{"id":13101,"date":"2026-08-06T07:53:39","date_gmt":"2026-08-06T07:53:39","guid":{"rendered":"https:\/\/weldomachining.com\/?p=13101"},"modified":"2026-08-06T07:54:23","modified_gmt":"2026-08-06T07:54:23","slug":"4340-steel-guide","status":"publish","type":"post","link":"https:\/\/weldomachining.com\/ja\/4340-steel-guide\/","title":{"rendered":"\u200c4340\u5408\u91d1\u92fc\u306e\u5b9f\u7528\u30ac\u30a4\u30c9\u200c"},"content":{"rendered":"<p class=\"wp-block-paragraph\">4340\u306f\u3001\u4e2d\u70ad\u7d20\u30cb\u30c3\u30b1\u30eb\u30fb\u30af\u30ed\u30e0\u30fb\u30e2\u30ea\u30d6\u30c7\u30f3\u5408\u91d1\u92fc\u3067\u3042\u308b\u3002.<br>AISI\/SAE\u898f\u683c\u306e\u30b0\u30ec\u30fc\u30c9\uff1a4340\u3002UNS\u756a\u53f7\uff1aG43400\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u6ce8\u90e8\u54c1\u306e\u8abf\u9054\u5206\u91ce\u306b\u304a\u3044\u3066\u30014340\u306f\u300c\u9ad8\u5f37\u5ea6\uff0b\u9ad8\u976d\u6027\u300d\u3068\u3044\u3046\u7dcf\u5408\u7684\u306a\u6027\u80fd\u3067\u5b9a\u8a55\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u92fc\u306b\u5206\u985e\u3055\u308c\u3001\u71b1\u51e6\u7406\u5de5\u7a0b\u306b\u3088\u3063\u3066\u305d\u306e\u6a5f\u68b0\u7684\u7279\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u6750\u6599\u306e\u7279\u6027\u3001\u52a0\u5de5\u8981\u4ef6\u3001\u304a\u3088\u3073\u71b1\u51e6\u7406\u304c\u6027\u80fd\u306b\u53ca\u307c\u3059\u5f71\u97ff\u3092\u628a\u63e1\u3059\u308b\u3053\u3068\u3067\u3001\u90e8\u54c1\u306e\u904b\u7528\u30b3\u30b9\u30c8\u3084\u4ed8\u5c5e\u54c1\u306e\u8010\u7528\u5e74\u6570\u3092\u3088\u308a\u9069\u5207\u306b\u7ba1\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u3053\u306e\u6750\u6599\u306b\u3064\u3044\u3066\u5305\u62ec\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering.webp\" alt=\"\u713c\u623b\u3057\u51e6\u7406\u3092\u65bd\u3057\u305f4340\u92fc\u306e\u5c0f\u30ed\u30c3\u30c8\u90e8\u54c1\" class=\"wp-image-12005\" style=\"width:600px\" srcset=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering.webp 800w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering-300x300.webp 300w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering-150x150.webp 150w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering-768x768.webp 768w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/07\/small-batch4340-steel-part-with-Tempering-12x12.webp 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">\u713c\u623b\u3057\u51e6\u7406\u3092\u65bd\u3057\u305f4340\u92fc\u306e\u5c0f\u30ed\u30c3\u30c8\u90e8\u54c1<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u306e\u5316\u5b66\u6210\u5206\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u8aac\u660e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u306b\u3088\u308b\u3068\u3001 <a href=\"https:\/\/www.solitaire-overseas.com\/blog\/astm-a29-steel\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM A29<\/a> \u898f\u683c\u306b\u3088\u308c\u3070\u30014340\u5408\u91d1\u92fc\u306e\u5316\u5b66\u6210\u5206\u7bc4\u56f2\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30a8\u30ec\u30e1\u30f3\u30c8<\/th><th>\u5185\u5bb9\u7bc4\u56f2<\/th><th>\u4e2d\u6838\u6a5f\u80fd<\/th><\/tr><\/thead><tbody><tr><td>\u30ab\u30fc\u30dc\u30f3\uff08C\uff09<\/td><td>0.38% \u2013 0.43%<\/td><td>\u713c\u5165\u308c\u786c\u3055\u306e\u4e0a\u9650\u3092\u6c7a\u5b9a\u3057\u3001\u88ab\u524a\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b<\/td><\/tr><tr><td>\u30cb\u30c3\u30b1\u30eb\uff08Ni\uff09<\/td><td>1.65% \u2013 2.00%<\/td><td>\u976d\u6027\u3092\u9ad8\u3081\u3001\u4f4e\u6e29\u885d\u6483\u7279\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b<\/td><\/tr><tr><td>\u30af\u30ed\u30e0\uff08Cr\uff09<\/td><td>0.70% \u2013 0.90%<\/td><td>\u713c\u5165\u308c\u6027\u3092\u5411\u4e0a\u3055\u305b\u3001\u8010\u6469\u8017\u6027\u3092\u9ad8\u3081\u308b<\/td><\/tr><tr><td>\u30e2\u30ea\u30d6\u30c7\u30f3 (Mo)<\/td><td>0.20% \u2013 0.30%<\/td><td>\u7d50\u6676\u7c92\u7d44\u7e54\u3092\u5fae\u7d30\u5316\u3057\u3001\u713c\u623b\u3057\u8106\u5316\u3092\u6291\u5236\u3059\u308b<\/td><\/tr><tr><td>\u30de\u30f3\u30ac\u30f3 (Mn)<\/td><td>0.60% \u2013 0.80%<\/td><td>\u8131\u9178\u7d20\u30fb\u8131\u786b\u3092\u884c\u3044\u3001\u71b1\u9593\u52a0\u5de5\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b<\/td><\/tr><tr><td>\u30b1\u30a4\u7d20 (Si)<\/td><td>0.15% \u2013 0.35%<\/td><td>\u8131\u9178\u5264\u3001\u88dc\u5f37\u5264<\/td><\/tr><tr><td>\u30ea\u30f3 (P)<\/td><td>\u22640.035%<\/td><td>\u4e0d\u7d14\u7269\u2015\u2015\u5c11\u306a\u3044\u307b\u3069\u826f\u3044<\/td><\/tr><tr><td>\u786b\u9ec4 (S)<\/td><td>\u22640.040%<\/td><td>\u4e0d\u7d14\u7269\u3067\u3059\u304c\u3001\u9069\u5207\u306a\u91cf\u3067\u3042\u308c\u3070\u52a0\u5de5\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u4e3b\u306a\u89e3\u91c8\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u306f\u30014340\u30924140\u306e\u3088\u3046\u306a\u30af\u30ed\u30e0\u30fb\u30e2\u30ea\u30d6\u30c7\u30f3\u92fc\u3068\u533a\u5225\u3059\u308b\u6700\u5927\u306e\u9055\u3044\u3067\u3059\u3002 1.65%\uff5e2.00%\u306e\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u306b\u3088\u308a\u30014340\u306f\u512a\u308c\u305f\u976d\u6027\u3068\u713c\u5165\u308c\u6027\u3092\u5099\u3048\u3066\u304a\u308a\u3001\u65ad\u9762\u7a4d\u306e\u5927\u304d\u306a\u88ab\u52a0\u5de5\u7269\u306b\u304a\u3044\u3066\u3082\u5747\u4e00\u306a\u786c\u5ea6\u5206\u5e03\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e2\u30ea\u30d6\u30c7\u30f3\u306e\u5f79\u5272\u306f\u3001\u3057\u3070\u3057\u3070\u904e\u5c0f\u8a55\u4fa1\u3055\u308c\u304c\u3061\u3067\u3059\u30020.20%\uff5e0.30%\u306e\u30e2\u30ea\u30d6\u30c7\u30f3\u306f\u3001\u713c\u304d\u623b\u3057\u8106\u5316\u3092\u52b9\u679c\u7684\u306b\u6291\u5236\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u304c\u30014340\u92fc\u304c\u9ad8\u6e29\u713c\u304d\u623b\u3057\u5f8c\u3082\u6025\u901f\u51b7\u5374\u3092\u5fc5\u8981\u3068\u3059\u308b\u7406\u7531\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u70ad\u7d20\u542b\u6709\u91cf\u306f0.38%\uff5e0.43%\u306e\u7bc4\u56f2\u306b\u5236\u5fa1\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u4e2d\u70ad\u7d20\u92fc\u306e\u7bc4\u7587\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002\u3053\u306e\u7bc4\u56f2\u3067\u306f\u3001\u52a0\u5de5\u6027\u3092\u7dad\u6301\u3057\u3064\u3064\u3001\u5f37\u5ea6\u3068\u976d\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u53d6\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u306e\u8010\u98df\u6027\u89e3\u6790<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u76f4\u63a5\u7684\u306a\u7d50\u8ad6\uff1a4340\u306f\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u8010\u98df\u6027\u306b\u306f\u9650\u754c\u304c\u3042\u308b\u3002.<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4340\u306e\u30af\u30ed\u30e0\u542b\u6709\u91cf\u306f\u308f\u305a\u304b0.70%\uff5e0.90%\u3067\u3042\u308a\u3001\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306e\u6700\u4f4e\u30af\u30ed\u30e0\u542b\u6709\u91cf\u8981\u4ef6\u3067\u3042\u308b12%\u3092\u306f\u308b\u304b\u306b\u4e0b\u56de\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5b89\u5b9a\u3057\u305f\u4e0d\u52d5\u614b\u76ae\u819c\u3092\u5f62\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u5b9f\u7e3e\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u6c17\u4e2d\u3067\u306f\u30014340\u306e\u8010\u98df\u6027\u306f\u901a\u5e38\u306e\u70ad\u7d20\u92fc\u3088\u308a\u3082\u308f\u305a\u304b\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u5dee\u306f\u305d\u308c\u307b\u3069\u5927\u304d\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u6e7f\u6c17\u306e\u591a\u3044\u74b0\u5883\u3001\u5869\u6c34\u5674\u9727\u3001\u3042\u308b\u3044\u306f\u9178\u6027\u30fb\u30a2\u30eb\u30ab\u30ea\u6027\u306e\u5a92\u4f53\u4e0b\u3067\u306f\u3001\u6025\u901f\u306b\u9306\u3073\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u4fdd\u8b77\u51e6\u7406\u3092\u65bd\u3057\u3066\u3044\u306a\u3044\u6a5f\u68b0\u52a0\u5de5\u6e08\u307f\u30ef\u30fc\u30af\u30d4\u30fc\u30b9\u306f\u3001\u4f5c\u696d\u5834\u74b0\u5883\u4e0b\u3067\u306f\u6570\u65e5\u4ee5\u5185\u306b\u8868\u9762\u306b\u9306\u306e\u6591\u70b9\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u4fdd\u8b77\u306b\u95a2\u3059\u308b\u63a8\u5968\u4e8b\u9805\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5404\u5de5\u7a0b\u306e\u5408\u9593\u306b\u9632\u9306\u6cb9\u3092\u5857\u5e03\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5b8c\u6210\u54c1\u306b\u306f\u8868\u9762\u51e6\u7406\u3092\u65bd\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9ed2\u8272\u5316\u51e6\u7406\u3001\u30ea\u30f3\u9178\u5869\u51e6\u7406\u3001\u30af\u30ed\u30e0\u30e1\u30c3\u30ad\u3001\u307e\u305f\u306f\u4e9c\u925b\u30e1\u30c3\u30ad\u306e\u3044\u305a\u308c\u3082\u8a31\u5bb9\u3055\u308c\u307e\u3059\u3002\u8150\u98df\u6027\u306e\u9ad8\u3044\u74b0\u5883\u3067\u4f7f\u7528\u3055\u308c\u308b\u90e8\u54c1\u306b\u3064\u3044\u3066\u306f\u3001\u4ee3\u308f\u308a\u306b\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3092\u76f4\u63a5\u63a1\u7528\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u4e00\u822c\u7684\u306a\u6750\u6599\u3068\u306e\u6bd4\u8f03\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7d20\u6750<\/th><th>\u30af\u30ed\u30e0\u542b\u6709\u91cf<\/th><th>\u8010\u98df\u6027\u8a55\u4fa1<\/th><\/tr><\/thead><tbody><tr><td>1045 \u70ad\u7d20\u92fc<\/td><td>\u306a\u3057<\/td><td>\u8ca7\u3057\u3044<\/td><\/tr><tr><td>4340\u5408\u91d1\u92fc<\/td><td>0.70%-0.90%<\/td><td>\u70ad\u7d20\u92fc\u3088\u308a\u308f\u305a\u304b\u306b\u512a\u308c\u3066\u3044\u308b<\/td><\/tr><tr><td>4140\u5408\u91d1\u92fc<\/td><td>0.80%-1.10%<\/td><td>4340\u3068\u540c\u69d8<\/td><\/tr><tr><td>304\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc<\/td><td>18%-20%<\/td><td>\u7d20\u6674\u3089\u3057\u3044<\/td><\/tr><tr><td>316\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc<\/td><td>16%-18%<\/td><td>\u5091\u51fa\u3057\u3066\u3044\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4.webp\" alt=\"AISI 4340\u88fd\u30af\u30e9\u30f3\u30d7\u30cd\u30b8\u306e\u5074\u9762\u56f3\" class=\"wp-image-10050\" style=\"width:600px\" srcset=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4.webp 800w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4-300x300.webp 300w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4-150x150.webp 150w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4-768x768.webp 768w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-4-12x12.webp 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340 \u6a5f\u68b0\u7684\u7279\u6027\u89e3\u6790<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4340\u306e\u6a5f\u68b0\u7684\u7279\u6027\u306f\u3001\u71b1\u51e6\u7406\u6761\u4ef6\u306b\u5927\u304d\u304f\u5de6\u53f3\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u4e00\u822c\u7684\u306a\u7d0d\u5165\u6761\u4ef6\u306b\u57fa\u3065\u3044\u305f\u8aac\u660e\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u713c\u304d\u306a\u307e\u3057\u72b6\u614b\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u786c\u5ea6\u306f\u901a\u5e38HB 248\u4ee5\u4e0b\u3067\u3001\u5f15\u5f35\u5f37\u5ea6\u306f\u7d04650\uff5e750 MPa\u3067\u3059\u3002\u3053\u306e\u72b6\u614b\u3067\u306f\u52a0\u5de5\u6027\u304c\u6700\u3082\u826f\u597d\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u8352\u52a0\u5de5\u306f\u3053\u306e\u72b6\u614b\u3067\u884c\u3046\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u6b63\u898f\u5316\u6761\u4ef6\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u786c\u5ea6\u306f\u713c\u306a\u307e\u3057\u72b6\u614b\u3088\u308a\u308f\u305a\u304b\u306b\u9ad8\u304f\u3001\u7d50\u6676\u7c92\u7d44\u7e54\u306f\u3088\u308a\u5fae\u7d30\u3067\u3059\u3002\u3042\u308b\u7a0b\u5ea6\u306e\u5f37\u5ea6\u304c\u6c42\u3081\u3089\u308c\u308b\u534a\u88fd\u54c1\u306e\u72b6\u614b\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u51e6\u7406\u6e08\u307f\u72b6\u614b\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f4340\u306b\u304a\u3044\u3066\u6700\u3082\u4e00\u822c\u7684\u306b\u7528\u3044\u3089\u308c\u308b\u6761\u4ef6\u3067\u3059\u3002\u4ee3\u8868\u7684\u306a\u6a5f\u68b0\u7684\u7279\u6027\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7269\u4ef6\u6307\u6a19<\/th><th>\u4ee3\u8868\u5024<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/weldomachining.com\/ja\/tensile-strength\/\" data-type=\"post\" data-id=\"11869\">\u5f15\u5f35\u5f37\u5ea6<\/a><\/td><td>980 MPa\u4ee5\u4e0a<\/td><td>\u71b1\u51e6\u7406\u306b\u3088\u3063\u3066\u306f\u30011200 MPa\u3092\u8d85\u3048\u308b\u5834\u5408\u3082\u3042\u308b<\/td><\/tr><tr><td>\u964d\u4f0f\u5f37\u5ea6<\/td><td>835 MPa\u4ee5\u4e0a<\/td><td>\u6b69\u7559\u307e\u308a\u6bd4\u306f\u7d040.85\u3001\u5851\u6027\u4f59\u529b\u306b\u4f59\u88d5\u304c\u3042\u308b<\/td><\/tr><tr><td>\u4f38\u3073<\/td><td>\u226512%<\/td><td>\u4e00\u5b9a\u306e\u5851\u6027\u5909\u5f62\u80fd\u529b\u3092\u78ba\u4fdd\u3059\u308b<\/td><\/tr><tr><td>\u9762\u7a4d\u306e\u7e2e\u5c0f<\/td><td>\u226545%<\/td><td>\u305d\u306e\u6750\u6599\u306e\u976d\u6027\u30ec\u30d9\u30eb\u3092\u8868\u3057\u3066\u3044\u307e\u3059<\/td><\/tr><tr><td>\u885d\u6483\u30a8\u30cd\u30eb\u30ae\u30fc\uff08\u30b7\u30e3\u30eb\u30d4\u30fcV\u30ce\u30c3\u30c1\uff09<\/td><td>40J\u4ee5\u4e0a\uff08\u5ba4\u6e29\uff09<\/td><td>\u30cb\u30c3\u30b1\u30eb\u5143\u7d20\u304c\u3082\u305f\u3089\u3059\u4e3b\u306a\u5229\u70b9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u4e3b\u306a\u89e3\u91c8\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u964d\u4f0f\u6bd4\u306f\u7d040.85\u3067\u3042\u308a\u3001\u3053\u308c\u306f\u3053\u306e\u6750\u6599\u304c\u7834\u65ad\u3059\u308b\u524d\u306b\u8457\u3057\u3044\u5851\u6027\u5909\u5f62\u3092\u53d7\u3051\u3001\u8106\u6027\u7834\u58ca\u306e\u3088\u3046\u306b\u7a81\u7136\u7834\u65ad\u3059\u308b\u3053\u3068\u306f\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u30024140\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001\u540c\u3058\u786c\u5ea6\u30ec\u30d9\u30eb\u306b\u304a\u3044\u3066\u3088\u308a\u9ad8\u3044\u885d\u6483\u976d\u6027\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u306e\u9055\u3044\u306b\u76f4\u63a5\u8d77\u56e0\u3059\u308b\u3082\u306e\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u786c\u5ea6\u3068\u5f37\u5ea6\u306e\u63db\u7b97\uff1a<\/strong>\u200c<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u786c\u5ea6\uff08HRC\uff09<\/th><th>\u304a\u304a\u3088\u305d\u306e\u5f15\u5f35\u5f37\u5ea6\uff08MPa\uff09<\/th><\/tr><\/thead><tbody><tr><td>28<\/td><td>900<\/td><\/tr><tr><td>32<\/td><td>1000<\/td><\/tr><tr><td>36<\/td><td>1150<\/td><\/tr><tr><td>40<\/td><td>1280<\/td><\/tr><tr><td>44<\/td><td>1420<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u786c\u5ea6\u304cHRC 36\u3092\u8d85\u3048\u308b\u3068\u30014340\u306e\u52a0\u5de5\u96e3\u6613\u5ea6\u306f\u5927\u5e45\u306b\u9ad8\u307e\u308a\u307e\u3059\u3002\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u5f8c\u306e\u786c\u5ea6\u3092HRC 28\uff5e34\u306e\u7bc4\u56f2\u5185\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3.webp\" alt=\"aisi 4340 \u30b9\u30e9\u30a4\u30c9\u30ea\u30fc\u30c9\u30b9\u30af\u30ea\u30e5\u30fc\" class=\"wp-image-10048\" style=\"width:600px\" srcset=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3.webp 800w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3-300x300.webp 300w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3-150x150.webp 150w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3-768x768.webp 768w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/05\/aisi-4340-clamp-screw-3-12x12.webp 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">AISI 4340 \u30b9\u30e9\u30a4\u30c9\u7528\u30ea\u30fc\u30c9\u30b9\u30af\u30ea\u30e5\u30fc<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340 \u6a5f\u68b0\u52a0\u5de5\u306e\u5b9f\u8df5\u7684\u306a\u30a2\u30c9\u30d0\u30a4\u30b9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4340\u306e\u52a0\u5de5\u7279\u6027\uff1a\u976d\u6027\u306b\u512a\u308c\u308b\u304c\u3001\u71b1\u4f1d\u5c0e\u7387\u306f\u4f4e\u304f\u3001\u52a0\u5de5\u786c\u5316\u3092\u8d77\u3053\u3057\u3084\u3059\u304f\u3001\u5de5\u5177\u3078\u306e\u8981\u6c42\u304c\u53b3\u3057\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u52a0\u5de5\u6761\u4ef6\u3068\u5de5\u5177\u306e\u9078\u5b9a\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u713c\u920d\u72b6\u614b\u3067\u306e\u8352\u52a0\u5de5\u3092\u512a\u5148\u3057\u3001\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u5f8c\u306b\u4ed5\u4e0a\u3052\u52a0\u5de5\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u713c\u920d\u72b6\u614b\u3067\u306e\u8352\u65cb\u524a\u306b\u306fP30\/P40\u8d85\u786c\u30c1\u30c3\u30d7\u3092\u4f7f\u7528\u3057\u3001\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u72b6\u614b\u3067\u306e\u4ed5\u4e0a\u3052\u65cb\u524a\u306b\u306fTiAlN\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u65bd\u3057\u305fP10\/P20\u30a4\u30f3\u30b5\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u7a74\u3042\u3051\u52a0\u5de5\u306b\u306f\u30b3\u30d0\u30eb\u30c8\u7cfb\u9ad8\u901f\u5ea6\u92fc\u307e\u305f\u306f\u8d85\u786c\u30c9\u30ea\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3002\u6a19\u6e96\u7684\u306a\u30c9\u30ea\u30eb\u3067\u306f\u3001\u3059\u3050\u306b\u713c\u3051\u3066\u3057\u307e\u3046\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u5b9f\u8df5\u7684\u306a\u8981\u70b9\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u3001\u5341\u5206\u306a\u51b7\u5374\u304c\u5fc5\u8981\u3067\u3059\u30024340\u306f\u71b1\u4f1d\u5c0e\u7387\u304c\u4f4e\u3044\u305f\u3081\u3001\u51b7\u5374\u304c\u4e0d\u5341\u5206\u3060\u3068\u5de5\u5177\u304c\u3059\u3050\u306b\u713c\u3051\u3066\u3057\u307e\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u306b\u3001\u300c\u5de5\u5177\u306e\u3053\u3059\u308a\u300d\u3092\u907f\u3051\u308b\u3053\u3068\u3067\u3059\u3002\u9001\u308a\u901f\u5ea6\u304c\u4f4e\u3059\u304e\u305f\u308a\u3001\u5207\u308a\u8fbc\u307f\u6df1\u3055\u304c\u4e0d\u5341\u5206\u3060\u3063\u305f\u308a\u3059\u308b\u3068\u3001\u5de5\u5177\u306f\u5207\u524a\u3092\u884c\u3046\u4ee3\u308f\u308a\u306b\u88ab\u524a\u6750\u306e\u8868\u9762\u3092\u3053\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u3059\u3050\u306b\u52a0\u5de5\u786c\u5316\u304c\u751f\u3058\u3001\u305d\u306e\u5f8c\u306e\u5207\u524a\u304c\u3055\u3089\u306b\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e09\u306b\u3001\u5207\u308a\u304f\u305a\u306e\u5236\u5fa1\u3067\u3059\u30024340\u6750\u306f\u786c\u304f\u3001\u7c21\u5358\u306b\u5272\u308c\u307e\u305b\u3093\u3002\u5207\u308a\u304f\u305a\u7834\u65ad\u5f62\u72b6\u3092\u5099\u3048\u305f\u30a4\u30f3\u30b5\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3001\u9001\u308a\u901f\u5ea6\u3092\u9069\u5207\u306b\u4e0a\u3052\u3066\u3001\u5207\u308a\u304f\u305a\u306e\u7834\u65ad\u3092\u4fc3\u9032\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u56db\u306b\u3001\u7a74\u3042\u3051\u4f5c\u696d\u4e2d\u306f\u983b\u7e41\u306b\u30d4\u30c3\u30c1\u30f3\u30b0\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u6df1\u3044\u7a74\u3092\u6398\u308b\u5834\u5408\u30011\u56de\u306e\u30d4\u30c3\u30c1\u30f3\u30b0\u3042\u305f\u308a\u306e\u6df1\u3055\u306f\u30c9\u30ea\u30eb\u5f84\u306e3\u500d\u3092\u8d85\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8a70\u307e\u308a\u3092\u9632\u3050\u305f\u3081\u3001\u5207\u308a\u304f\u305a\u306f\u901f\u3084\u304b\u306b\u53d6\u308a\u9664\u3044\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u3088\u304f\u3042\u308b\u554f\u984c\u3068\u89e3\u6c7a\u7b56\uff1a<\/strong>\u200c<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u554f\u984c\u70b9<\/th><th>\u8003\u3048\u3089\u308c\u308b\u539f\u56e0<\/th><th>\u89e3\u6c7a\u7b56\u306e\u65b9\u5411\u6027<\/th><\/tr><\/thead><tbody><tr><td>\u5de5\u5177\u306e\u6b20\u3051<\/td><td>\u5207\u524a\u901f\u5ea6\u304c\u9ad8\u3059\u304e\u308b\u3001\u307e\u305f\u306f\u51b7\u5374\u304c\u4e0d\u5341\u5206<\/td><td>\u8868\u9762\u901f\u5ea6\u3092\u4e0b\u3052\u3001\u51b7\u5374\u5264\u306e\u6d41\u91cf\u3092\u5897\u3084\u3059<\/td><\/tr><tr><td>\u8868\u9762\u4ed5\u4e0a\u3052\u304c\u60aa\u3044<\/td><td>\u30a8\u30c3\u30b8\u306e\u5806\u7a4d\u3084\u5de5\u5177\u306e\u6469\u8017<\/td><td>\u5207\u524a\u901f\u5ea6\u3092\u4e0a\u3052\u308b\u3001\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u305f\u30a4\u30f3\u30b5\u30fc\u30c8\u306b\u4ea4\u63db\u3059\u308b<\/td><\/tr><tr><td>\u4f5c\u696d\u786c\u5316<\/td><td>\u9001\u308a\u901f\u5ea6\u304c\u4f4e\u3059\u304e\u308b\u305f\u3081\u3001\u5de5\u5177\u304c\u8868\u9762\u306b\u63a5\u89e6\u3057\u3066\u3044\u308b<\/td><td>\u9001\u308a\u91cf\u3092\u5897\u52a0\u3055\u305b\u3001\u5de5\u5177\u304c\u78ba\u5b9f\u306b\u300c\u98df\u3044\u8fbc\u3080\u300d\u3088\u3046\u306b\u3059\u308b\u201c<\/td><\/tr><tr><td>\u30c1\u30c3\u30d7\u306e\u91cf\u5b50\u3082\u3064\u308c<\/td><td>\u30c1\u30c3\u30d7\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u4e0d\u9069\u5408\u307e\u305f\u306f\u9001\u308a\u91cf\u306e\u4e0d\u8db3<\/td><td>\u30c1\u30c3\u30d7\u30d6\u30ec\u30fc\u30ab\u30fc\u4ed8\u304d\u30a4\u30f3\u30b5\u30fc\u30c8\u306b\u4ea4\u63db\u3057\u3001\u9001\u308a\u91cf\u3092\u9069\u5207\u306b\u5897\u3084\u3059<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u306e\u71b1\u51e6\u7406\u5de5\u7a0b\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u89e3\u8aac<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u71b1\u51e6\u7406\u306f\u30014340\u306e\u6027\u80fd\u3092\u5de6\u53f3\u3059\u308b\u300c\u9375\u300d\u3068\u306a\u308a\u307e\u3059\u3002\u540c\u3058\u6750\u6599\u3067\u3042\u3063\u3066\u3082\u3001\u7570\u306a\u308b <a href=\"https:\/\/weldomachining.com\/ja\/heat-treatment-guide\/\" data-type=\"post\" data-id=\"10014\">\u71b1\u51e6\u7406<\/a> \u6700\u7d42\u7684\u306a\u7279\u6027\u304c\u5927\u304d\u304f\u7570\u306a\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u713c\u5165\u308c\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">830\uff5e860\u00b0C\u307e\u3067\u52a0\u71b1\u3057\u3001\u5341\u5206\u306a\u6642\u9593\u4fdd\u6301\u3057\u305f\u5f8c\u3001\u6025\u901f\u306b\u51b7\u5374\u3059\u308b\u3002\u6cb9\u713c\u5165\u308c\u304c\u63a8\u5968\u3055\u308c\u308b\u30024340\u306f\u512a\u308c\u305f\u713c\u5165\u308c\u6027\u3092\u6709\u3057\u3066\u304a\u308a\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3092\u5f97\u308b\u306b\u306f\u6cb9\u713c\u5165\u308c\u3067\u5341\u5206\u3067\u3042\u308b\u3002\u6c34\u713c\u5165\u308c\u306f\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u3001\u8907\u96d1\u306a\u5f62\u72b6\u306e\u90e8\u54c1\u3067\u306f\u5272\u308c\u304c\u751f\u3058\u3084\u3059\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u713c\u304d\u623b\u3057\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u713c\u5165\u308c\u5f8c\u306f\u3001\u5fc5\u305a\u713c\u623b\u3057\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6e29\u5ea6\u306f\u3001\u76ee\u6a19\u3068\u3059\u308b\u786c\u5ea6\u306b\u57fa\u3065\u3044\u3066\u9078\u5b9a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u713c\u304d\u623b\u3057\u6e29\u5ea6\uff08\u00b0C\uff09<\/th><th>\u304a\u304a\u3088\u305d\u306e\u786c\u5ea6\uff08HRC\uff09<\/th><th>\u9069\u7528\u30b7\u30ca\u30ea\u30aa<\/th><\/tr><\/thead><tbody><tr><td>200-300<\/td><td>46-52<\/td><td>\u9ad8\u786c\u5ea6\u306e\u6469\u8017\u90e8\u54c1<\/td><\/tr><tr><td>350-450<\/td><td>40-45<\/td><td>\u4e2d\u786c\u5ea6\u306e\u69cb\u9020\u90e8\u54c1<\/td><\/tr><tr><td>500-550<\/td><td>34-38<\/td><td>\u4e00\u822c\u7684\u306a\u6a5f\u68b0\u90e8\u54c1<\/td><\/tr><tr><td>580-650<\/td><td>28-33<\/td><td>\u9ad8\u976d\u6027\u30fb\u9ad8\u8ca0\u8377\u7528\u90e8\u54c1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u713c\u5165\u308c\u8106\u5316\u2015\u2015\u7d76\u5bfe\u306b\u907f\u3051\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u843d\u3068\u3057\u7a74\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">350\uff5e450\u00b0C\u306e\u7bc4\u56f2\u3067\u713c\u304d\u623b\u3057\u3092\u884c\u3046\u304b\u3001550\u00b0C\u4ee5\u4e0a\u3067\u713c\u304d\u623b\u3057\u3092\u884c\u3063\u305f\u5f8c\u306b\u5f90\u51b7\u3059\u308b\u3068\u3001\u885d\u6483\u976d\u6027\u304c\u6025\u6fc0\u306b\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u5bfe\u7b56\uff1a\u713c\u304d\u623b\u3057\u4fdd\u6301\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u6cb9\u51b7\u307e\u305f\u306f\u6c34\u51b7\u3092\u7528\u3044\u3066\u6025\u901f\u306b\u51b7\u5374\u3057\u3001\u81ea\u7136\u51b7\u5374\u306f\u884c\u308f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u4ee3\u8868\u7684\u306a\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u5de5\u7a0b\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">850\u00b0C\u3067\u6cb9\u713c\u304d\u5165\u308c \u2192 580\uff5e620\u00b0C\u3067\u713c\u304d\u623b\u3057 \u2192 \u6025\u51b7\u3002\u786c\u5ea6 HRC 28\uff5e34\u3001\u5f15\u5f35\u5f37\u5ea6 900\uff5e1050 MPa\u3002\u3053\u308c\u306f4340\u92fc\u306b\u3068\u3063\u3066\u6700\u3082\u5178\u578b\u7684\u306a\u4f7f\u7528\u6761\u4ef6\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u8868\u9762\u71b1\u51e6\u7406\uff1a<\/strong>\u200c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5916\u5c64\u306e\u786c\u5ea6\u304c\u9ad8\u304f\u3001\u82af\u90e8\u3082\u5f37\u976d\u3067\u3042\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u308b\u90e8\u54c1\u306b\u3064\u3044\u3066\u306f\u3001\u7a92\u5316\u51e6\u7406\uff08\u8868\u9762\u786c\u5ea6 HV 600\uff5e700\uff09\u307e\u305f\u306f\u9ad8\u5468\u6ce2\u713c\u5165\u308c\uff08\u8868\u9762\u786c\u5ea6 HRC 50\uff5e55\uff09\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"525\" src=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2025\/11\/weldo-quality-assurance-center.webp\" alt=\"\u30a6\u30a7\u30eb\u30c9\u54c1\u8cea\u4fdd\u8a3c\u30bb\u30f3\u30bf\u30fc\" class=\"wp-image-3764\" style=\"width:600px\" srcset=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2025\/11\/weldo-quality-assurance-center.webp 700w, https:\/\/weldomachining.com\/wp-content\/uploads\/2025\/11\/weldo-quality-assurance-center-300x225.webp 300w, https:\/\/weldomachining.com\/wp-content\/uploads\/2025\/11\/weldo-quality-assurance-center-16x12.webp 16w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\">\u30a6\u30a7\u30eb\u30c9\u54c1\u8cea\u4fdd\u8a3c\u30bb\u30f3\u30bf\u30fc<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u92fc\u88fd\u90e8\u54c1\u306e\u4e3b\u306a\u8868\u9762\u51e6\u7406\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8868\u9762\u5f37\u5316<\/strong>\u200c\uff1a\u9ad8\u5468\u6ce2\u713c\u5165\u308c\u3068\u305d\u308c\u306b\u7d9a\u304f\u4f4e\u6e29\u713c\u623b\u3057\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u8868\u9762\u786c\u5ea6HRC 55\uff5e60\u3092\u5b9f\u73fe\u3057\u3001\u512a\u308c\u305f\u8010\u6469\u8017\u6027\u3068\u82af\u90e8\u306e\u976d\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u4e21\u7acb\u3055\u305b\u307e\u3059\u3002 500\uff5e550\u2103\u3067\u306e\u7a92\u5316\u51e6\u7406\u306b\u3088\u308a\u3001\u6b6a\u307f\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u304c\u30890.1\uff5e0.5mm\u306e\u9ad8\u786c\u5ea6\u5c64\u3092\u5f62\u6210\u3057\u3001\u9ad8\u7cbe\u5ea6\u3067\u9ad8\u8ca0\u8377\u304c\u304b\u304b\u308b\u90e8\u54c1\u306b\u6700\u9069\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>\u200c\uff1a\u786c\u8cea\u30af\u30ed\u30e0\u3081\u3063\u304d\u3067\u306f\u3001\u6c34\u7d20\u8106\u5316\u3092\u6392\u9664\u3059\u308b\u305f\u3081\u306b\u3001185\uff5e195\u2103\u3067\u306e\u5f8c\u51e6\u7406\u713c\u5165\u308c\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001HVOF\u6cd5\u3067\u5674\u5c04\u3055\u308c\u305fWC-Co\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u306f\u3001\u5727\u7e2e\u5fdc\u529b\u72b6\u614b\u306b\u3042\u308b\u305f\u3081\u3001\u75b2\u52b4\u7279\u6027\u3078\u306e\u60aa\u5f71\u97ff\u304c\u306f\u308b\u304b\u306b\u5c11\u306a\u304f\u3001\u6c34\u7d20\u9664\u53bb\u5de5\u7a0b\u3082\u4e0d\u8981\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u3001\u822a\u7a7a\u5b87\u5b99\u90e8\u54c1\u306b\u306f\u3053\u306e\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u597d\u3093\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u30b9\u30c8\u30ec\u30b9\u306e\u8abf\u7bc0<\/strong>\u200c\uff1a650\uff5e675\u2103\u3067\u306e\u5168\u9762\u713c\u920d\u306b\u3088\u308a\u3001\u6a5f\u68b0\u52a0\u5de5\u3084\u77ef\u6b63\u306e\u904e\u7a0b\u3067\u751f\u3058\u305f\u6b8b\u7559\u5fdc\u529b\u3092\u9664\u53bb\u3057\u3001\u4f7f\u7528\u4e2d\u306e\u5909\u5f62\u3092\u9632\u6b62\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u57fa\u672c\u7684\u306a\u8150\u98df\u9632\u6b62\u5bfe\u7b56<\/strong>\u200c\uff1a\u901a\u5e38\u306e\u4f7f\u7528\u74b0\u5883\u3067\u306f\u3001\u9ed2\u8272\u9178\u5316\u76ae\u819c\u51e6\u7406\u3084\u4e9c\u925b\u30e1\u30c3\u30ad\u304c\u3001\u4f4e\u30b3\u30b9\u30c8\u3067\u9632\u9306\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u8150\u98df\u304c\u6fc0\u3057\u3044\u74b0\u5883\u3067\u306f\u3001\u9ad8\u6027\u80fd\u306a\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u306e\u4f75\u7528\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u306e\u4ee3\u8868\u7684\u306a\u7528\u9014\u4f8b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4340\u306e\u6750\u6599\u9078\u5b9a\u306b\u304a\u3051\u308b\u57fa\u672c\u65b9\u91dd\uff1a\u9ad8\u5f37\u5ea6\uff0b\u9ad8\u976d\u6027\uff0b\u8010\u75b2\u52b4\u6027\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u81ea\u52d5\u8eca\u30fb\u30ec\u30fc\u30b9\uff1a<\/strong>\u200c \u30af\u30e9\u30f3\u30af\u30b7\u30e3\u30d5\u30c8\u3001\u30b3\u30cd\u30af\u30c6\u30a3\u30f3\u30b0\u30ed\u30c3\u30c9\u3001\u30cf\u30fc\u30d5\u30b7\u30e3\u30d5\u30c8\u3001\u30c9\u30e9\u30a4\u30d6\u30b7\u30e3\u30d5\u30c8\u3002\u30ec\u30fc\u30b7\u30f3\u30b0\u7528\u30b3\u30cd\u30af\u30c6\u30a3\u30f3\u30b0\u30ed\u30c3\u30c9\u306f\u3001\u307b\u307c\u4f8b\u5916\u306a\u304f4340\u92fc\u3067\u4f5c\u3089\u308c\u3066\u304a\u308a\u3001\u8efd\u91cf\u8a2d\u8a08\u3067\u3042\u3063\u3066\u3082\u75b2\u52b4\u5bff\u547d\u304c\u78ba\u4fdd\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u822a\u7a7a\u5b87\u5b99<\/strong>\u200c \u7740\u9678\u88c5\u7f6e\u306e\u69cb\u6210\u90e8\u54c1\u3002\u7740\u9678\u6642\u306b\u83ab\u5927\u306a\u885d\u6483\u8377\u91cd\u304c\u304b\u304b\u308b\u305f\u3081\u30014340\u92fc\u306e\u9ad8\u3044\u976d\u6027\u3068\u8010\u75b2\u52b4\u6027\u304c\u3001\u3053\u306e\u6750\u6599\u304c\u63a1\u7528\u3055\u308c\u305f\u4e3b\u306a\u7406\u7531\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u5de5\u5177\u304a\u3088\u3073\u6a5f\u68b0\uff1a<\/strong>\u200c \u30d8\u30d3\u30fc\u30c7\u30e5\u30fc\u30c6\u30a3\u30fc\u7528\u6b6f\u8eca\u300112.9\u7d1a\u9ad8\u5f37\u5ea6\u30dc\u30eb\u30c8\u3002\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u3092\u884c\u3063\u305f\u5f8c\u3001\u7a92\u5316\u51e6\u7406\u307e\u305f\u306f\u9ad8\u5468\u6ce2\u713c\u5165\u308c\u3092\u884c\u3046\u306e\u304c\u6a19\u6e96\u7684\u306a\u88fd\u9020\u5de5\u7a0b\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u77f3\u6cb9\u95a2\u9023\u6a5f\u5668\uff1a<\/strong>\u200c \u5751\u5185\u5de5\u5177\u3001\u30c9\u30ea\u30eb\u30d1\u30a4\u30d7\u7d99\u624b\u3002\u9ad8\u5727\u30fb\u9ad8\u30c8\u30eb\u30af\u306e\u74b0\u5883\u4e0b\u306b\u304a\u3044\u3066\u3001\u8868\u9762\u51e6\u7406\u3092\u65bd\u3057\u305f4340\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u92fc\u306f\u3001API\u898f\u683c\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u3068\u4ed6\u306e\u5408\u91d1\u92fc\u3068\u306e\u6bd4\u8f03\u304a\u3088\u3073\u9078\u5b9a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>4340 \u5bfe 4140\uff1a<\/strong>\u200c 4340\u306b\u306f\u30cb\u30c3\u30b1\u30eb\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u540c\u3058\u786c\u5ea6\u3067\u3042\u3063\u3066\u308230%-50%\u3088\u308a\u3082\u9ad8\u3044\u885d\u6483\u976d\u6027\u3092\u767a\u63ee\u3057\u307e\u3059\u30024140\u306f\u3001\u904e\u9177\u306a\u885d\u6483\u8377\u91cd\u3092\u53d7\u3051\u308b\u3053\u3068\u304c\u306a\u3044\u5834\u5408\u306b\u306f\u3001\u30b3\u30b9\u30c8\u304c\u4f4e\u304f\u3001\u3088\u308a\u7d4c\u6e08\u7684\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>4340 \u5bfe 8620\uff1a<\/strong>\u200c 8620\u306f\u8868\u9762\u786c\u5316\u92fc\u3067\u3042\u308a\u3001\u8868\u9762\u306f\u786c\u304f\u3001\u82af\u90e8\u306f\u976d\u6027\u304c\u9ad8\u3044\u305f\u3081\u3001\u6b6f\u8eca\u3084\u30ab\u30e0\u30b7\u30e3\u30d5\u30c8\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u30024340\u306f\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u92fc\u3067\u3042\u308a\u3001\u5168\u4f53\u3068\u3057\u3066\u9ad8\u3044\u5f37\u5ea6\u3068\u976d\u6027\u3092\u5099\u3048\u3066\u3044\u308b\u305f\u3081\u3001\u30af\u30e9\u30f3\u30af\u30b7\u30e3\u30d5\u30c8\u3084\u30b3\u30cd\u30af\u30c6\u30a3\u30f3\u30b0\u30ed\u30c3\u30c9\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>4340 \u5bfe 300M\uff1a<\/strong>\u200c 300M\u306f4340\u3092\u6539\u826f\u3057\u305f\u3082\u306e\u3067\u3001\u5f15\u5f35\u5f37\u5ea6\u306f1900\uff5e2100 MPa\u306b\u9054\u3057\u3001\u904e\u9177\u306a\u822a\u7a7a\u5b87\u5b99\u7528\u9014\u5411\u3051\u306b\u7279\u5225\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u30024340\u306f\u3001\u4e00\u822c\u7684\u306a\u7523\u696d\u7528\u9014\u306b\u306f\u5341\u5206\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u30af\u30a4\u30c3\u30af\u9078\u629e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7d20\u6750<\/th><th>\u5f37\u3055<\/th><th>\u30bf\u30d5\u30cd\u30b9<\/th><th>\u30b3\u30b9\u30c8<\/th><th>\u4ee3\u8868\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/th><\/tr><\/thead><tbody><tr><td>4340<\/td><td>\u9ad8\u3044<\/td><td>\u9ad8\u3044<\/td><td>\u30df\u30c7\u30a3\u30a2\u30e0-\u30cf\u30a4<\/td><td>\u30af\u30e9\u30f3\u30af\u30b7\u30e3\u30d5\u30c8\u3001\u30b3\u30cd\u30af\u30c6\u30a3\u30f3\u30b0\u30ed\u30c3\u30c9\u3001\u30ae\u30a2<\/td><\/tr><tr><td><a href=\"https:\/\/weldomachining.com\/ja\/aisi-4140-material\/\" data-type=\"post\" data-id=\"10044\">4140<\/a><\/td><td>\u30df\u30c7\u30a3\u30a2\u30e0-\u30cf\u30a4<\/td><td>\u30df\u30c7\u30a3\u30a2\u30e0<\/td><td>\u30df\u30c7\u30a3\u30a2\u30e0<\/td><td>\u8ef8\u3001\u30dc\u30eb\u30c8<\/td><\/tr><tr><td>8620<\/td><td>\u8868\u9762\u304c\u76db\u308a\u4e0a\u304c\u3063\u3066\u3044\u308b<\/td><td>\u30b3\u30a2\u90e8\u5206\u304c\u591a\u3044<\/td><td>\u30df\u30c7\u30a3\u30a2\u30e0<\/td><td>\u30ae\u30a2\u3001\u30ab\u30e0\u30b7\u30e3\u30d5\u30c8<\/td><\/tr><tr><td>3\u5104<\/td><td>\u6975\u3081\u3066\u9ad8\u3044<\/td><td>\u9ad8\u3044<\/td><td>\u9ad8\u3044<\/td><td>\u7740\u9678\u88c5\u7f6e\u3001\u822a\u7a7a\u6a5f\u69cb\u9020\u90e8\u54c1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4340\u6750\u306e\u8cfc\u5165\u306b\u95a2\u3059\u308b\u6ce8\u610f\u4e8b\u9805<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u6750\u6599\u306e\u8a8d\u8a3c\uff1a<\/strong>\u200c \u71b1\u756a\u53f7\u304c\u4e00\u81f4\u3059\u308b\u6750\u6599\u8a3c\u660e\u66f8\u3092\u63d0\u51fa\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c1.65%\uff5e2.00%\u306e\u7bc4\u56f2\u5185\u306b\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u91cd\u70b9\u7684\u306b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30cb\u30c3\u30b1\u30eb\u306f4340\u306b\u304a\u3044\u3066\u6700\u3082\u9ad8\u4fa1\u306a\u5408\u91d1\u5143\u7d20\u3067\u3042\u308a\u3001\u54c1\u8cea\u306e\u52a3\u308b\u6750\u6599\u3067\u306f\u3001\u3053\u306e\u70b9\u3067\u624b\u629c\u304d\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u914d\u9001\u6761\u4ef6\uff1a<\/strong>\u200c \u5165\u8377\u5f8c\u3059\u3050\u306b\u8352\u52a0\u5de5\u304c\u53ef\u80fd\u306a\u3001\u713c\u304d\u306a\u307e\u3057\u72b6\u614b\uff08HB 248\u4ee5\u4e0b\uff09\u306e\u88fd\u54c1\u3092\u512a\u5148\u3057\u3066\u8cfc\u5165\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u72b6\u614b\u306e\u88fd\u54c1\u306f\u30b3\u30b9\u30c8\u304c\u9ad8\u304f\u3001\u76f4\u63a5\u4ed5\u4e0a\u3052\u52a0\u5de5\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u8d85\u97f3\u6ce2\u691c\u67fb\uff1a<\/strong>\u200c \u91cd\u8981\u90e8\u54c1\u306b\u3064\u3044\u3066\u306f\u3001\u52a0\u5de5\u306e\u9014\u4e2d\u3067\u5185\u90e8\u6b20\u9665\u304c\u898b\u3064\u304b\u308b\u3053\u3068\u3092\u9632\u3050\u305f\u3081\u3001\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306b\u5bfe\u3057\u8d85\u97f3\u6ce2\u691c\u67fb\u5831\u544a\u66f8\u306e\u63d0\u51fa\u3092\u7fa9\u52d9\u4ed8\u3051\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u5bf8\u6cd5\u516c\u5dee\uff1a<\/strong>\u200c \u71b1\u51e6\u7406\u3092\u884c\u3046\u3068\u5909\u5f62\u304c\u751f\u3058\u307e\u3059\u3002\u7c97\u52a0\u5de5\u5f8c\u306f\u3001\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u3092\u884c\u3046\u524d\u306b0.5\uff5e1mm\u306e\u4f59\u88d5\u3092\u6301\u305f\u305b\u3001\u71b1\u51e6\u7406\u5f8c\u306b\u6700\u7d42\u5bf8\u6cd5\u306b\u306a\u308b\u3088\u3046\u4ed5\u4e0a\u3052\u52a0\u5de5\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u200c<strong>\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u9078\u5b9a\uff1a<\/strong>\u200c \u54c1\u8cea\u30de\u30cd\u30b8\u30e1\u30f3\u30c8\u30b7\u30b9\u30c6\u30e0\u306e\u8a8d\u8a3c\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u3092\u512a\u5148\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8f38\u51fa\u6ce8\u6587\u306b\u3064\u3044\u3066\u306f\u3001\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u304cEN 10204 3.1\u8a3c\u660e\u66f8\u3092\u767a\u884c\u3067\u304d\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"540\" src=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/03\/weldo-machining-center.webp\" alt=\"\u30a6\u30a7\u30eb\u30c9\u30de\u30b7\u30cb\u30f3\u30b0\u30bb\u30f3\u30bf\u30fc\" class=\"wp-image-7899\" style=\"width:600px\" srcset=\"https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/03\/weldo-machining-center.webp 800w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/03\/weldo-machining-center-300x203.webp 300w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/03\/weldo-machining-center-768x518.webp 768w, https:\/\/weldomachining.com\/wp-content\/uploads\/2026\/03\/weldo-machining-center-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u6982\u8981<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4340\u306f\u3001\u300c\u9069\u5207\u306a\u52a0\u5de5\u306b\u3088\u3063\u3066\u305d\u306e\u771f\u4fa1\u3092\u767a\u63ee\u3059\u308b\u300d\u7d20\u6750\u3067\u3059\u3002\u201c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u306e\u4e0a\u9650\u5024\u306f\u5316\u5b66\u6210\u5206\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u3001\u30af\u30ed\u30e0\u3001\u30e2\u30ea\u30d6\u30c7\u30f3\u306e\u76f8\u4e57\u52b9\u679c\u306b\u3088\u308a\u3001\u5f37\u5ea6\u3068\u976d\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u53d6\u308c\u3066\u3044\u307e\u3059\u3002 \u6a5f\u68b0\u52a0\u5de5\u3068\u71b1\u51e6\u7406\u304c\u305d\u306e\u4e0b\u9650\u3092\u6c7a\u5b9a\u3065\u3051\u308b\u3002\u713c\u920d\u72b6\u614b\u3067\u306e\u8352\u52a0\u5de5\u3001\u713c\u5165\u308c\u30fb\u713c\u623b\u3057\u5f8c\u306e\u4ed5\u4e0a\u3052\u52a0\u5de5\u3001\u305d\u3057\u3066\u713c\u623b\u3057\u5f8c\u306e\u6025\u51b7\u3068\u3044\u3063\u305f\u5de5\u7a0b\u3092\u9069\u5207\u306b\u884c\u3048\u3070\u30014340\u306f\u5947\u8de1\u7684\u306a\u6750\u6599\u3068\u306a\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3054\u8cfc\u5165\u306e\u969b\u306f\u3001\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u3068\u7d0d\u54c1\u72b6\u614b\u3092\u3057\u3063\u304b\u308a\u3068\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u826f\u8cea\u306a\u6750\u6599\u3068\u512a\u308c\u305f\u52a0\u5de5\u6280\u8853\u304c\u76f8\u307e\u3063\u3066\u3001\u826f\u8cea\u306a\u90e8\u54c1\u304c\u751f\u307e\u308c\u307e\u3059\u30024340\u6750\u306e\u7279\u6ce8\u90e8\u54c1\u306b\u3064\u3044\u3066\u304a\u898b\u7a4d\u3082\u308a\u3092\u3054\u5e0c\u671b\u306e\u5834\u5408\u306f\u3001 <a href=\"https:\/\/weldomachining.com\/ja\/%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89\/\" data-type=\"page\" data-id=\"843\">\u30b3\u30f3\u30bf\u30af\u30c8<\/a> \u79c1\u305f\u3061\u3068\u4e00\u7dd2\u306b<\/p>","protected":false},"excerpt":{"rendered":"<p>4340 is a medium-carbon nickel-chromium-molybdenum alloy steel.AISI\/SAE standard grade: 4340. UNS number: G43400. In the field of custom parts procurement, 4340 is renowned for its comprehensive performance of &#8220;high strength + high toughness&#8221;. It falls into the category of quenched and tempered steel, and its mechanical properties are highly enhanced by the heat treatment process. Mastering its material characteristics, processing requirements and the influence of heat treatment performance can make the service cost of your parts and the service life of accessories more controllable. Below I will give a comprehensive introduction around this material. Detailed Explanation of 4340 Chemical Composition According to the ASTM A29 standard, the chemical composition range [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":10050,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-13101","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/posts\/13101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/comments?post=13101"}],"version-history":[{"count":2,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/posts\/13101\/revisions"}],"predecessor-version":[{"id":13104,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/posts\/13101\/revisions\/13104"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/media\/10050"}],"wp:attachment":[{"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/media?parent=13101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/categories?post=13101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/weldomachining.com\/ja\/wp-json\/wp\/v2\/tags?post=13101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}