Custom Brass Machining
Brass CNC Machining Services
Brass delivers excellent machinability, low friction, corrosion resistance and a clean decorative finish. Send your drawing for grade selection, manufacturability review and a clear production quote.
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Material Profile
Key Properties of Brass
Brass properties vary by alloy, temper and product form. These ranges cover commonly machined wrought and free-cutting grades.
| Density | 8.2–8.7 g/cm³ |
|---|---|
| Tensile Strength | 300–700 MPa |
| Yield Strength | 100–550 MPa |
| Elongation | 5–50% |
| Hardness | 60–200 HB |
| Electrical Conductivity | 12–30% IACS |
| Thermal Conductivity | 100–160 W/m·K |
Brass Material Selection
Choose the Right Brass Grade
Select the grade by forming route, machinability, corrosion exposure and regulatory requirements. Final material condition is confirmed from the drawing and service environment.
C26000 Cartridge Brass
A 70/30 copper-zinc brass with excellent cold-forming response, good corrosion resistance and a clean decorative appearance.
- Best for
- Deep-drawn housings, terminals, clips and stamped components
- Production route
- Cold forming followed by controlled secondary machining
- Machining note
- Confirm temper before cutting formed or thin-wall parts
- Common finish
- Polishing, plating or clear protective coating
C36000 Free-Cutting Brass
A leaded brass engineered for fast, stable machining with short chips, accurate threads and consistent turned surfaces.
- Best for
- Fittings, valve parts, fasteners and high-volume turned components
- Production route
- CNC turning, milling and screw-machine production
- Machining note
- Excellent machinability supports efficient repeat production
- Common finish
- As-machined, polishing, nickel plating or tin plating
C36000 contains lead. Confirm regulatory requirements before specifying it for potable-water or lead-restricted applications.
C37700 Forging Brass
A leaded forging brass with excellent hot forgeability and strong follow-up machinability for near-net-shape parts.
- Best for
- Valve bodies, hardware, forged fittings and shaped components
- Production route
- Hot forging followed by datum-controlled machining
- Machining note
- Establish final machining datums from the forged blank
- Common finish
- Polishing, nickel plating or clear protective coating
C46400 Naval Brass
A tin-containing brass selected for seawater corrosion resistance, useful strength and dependable marine service.
- Best for
- Marine hardware, shafts, valve stems and fasteners
- Production route
- Turning and milling from bar, rod or formed stock
- Machining note
- Use rigid tooling and controlled cutting parameters
- Common finish
- Polishing, cleaning, lacquer or nickel plating
C69300 Lead-Free Silicon Brass
A lead-free silicon brass combining high strength, good machinability and corrosion resistance for fluid-service components.
- Best for
- Valves, fittings and potable-water hardware subject to certification
- Production route
- Forging, CNC turning and precision secondary machining
- Machining note
- Confirm temper, lead-free specification and market compliance
- Common finish
- As-machined, polishing, cleaning or nickel plating
Mechanical properties, corrosion performance and compliance depend on product form, temper and certification. Include the service environment and applicable standard with the drawing.
Machining Capability
Brass CNC Machining Parameters
Final capability is confirmed from the brass grade, temper, geometry, feature depth and inspection method.
| Maximum Part Size | 2000 × 1000 × 1000 mm |
|---|---|
| Minimum Part Size | 5 × 5 × 5 mm |
| Minimum Diameter | Ø0.5 mm |
| Minimum Wall Thickness | 0.5 mm |
| Standard Tolerance | ±0.05 mm |
| Precision Features | Down to ±0.01 mm |
| Precision Roundness | Down to 0.003 mm |
| Surface Roughness | Ra 0.4–3.2 μm |
Machining Guidance
Control Chips, Burrs and Thin Features
Select the Right Grade
Match machinability, strength, corrosion exposure and compliance before programming begins.
Control Burr Formation
Use sharp tools, clean cutting exits and accessible deburring around small features.
Support Thin Walls
Stable workholding and staged cutting protect wall thickness and finished geometry.
Confirm Service Conditions
Review fluid contact, temperature, conductivity and regulatory requirements.
Surface Finishing
Finishes for Brass Parts
Choose the finish according to appearance, wear, conductivity, corrosion protection and assembly requirements.
Polishing & Brushing
Controls gloss, texture and visible surface quality.
Sandblasting
Creates a uniform matte texture before final coating.
Nickel or Chrome
Adds wear resistance and a controlled decorative finish.
Tin Plating
Supports solderability and selected electrical applications.
Clear Coat or Patina
Preserves the color or creates a specified aged appearance.
Custom Projects
Custom CNC-Machined Brass Parts
Custom brass components for electrical, fluid-control, automotive, industrial and decorative applications—from prototypes to repeat production.
Machining & Inspection
From Process Review to Final Inspection
Machining, grinding, EDM and dimensional inspection support controlled production from prototypes to repeat orders.
Project Questions
Brass Machining FAQ
Does brass turn green?
Brass can develop green or brown surface products when copper reacts with moisture, salts or chemicals. Polishing, clear coating or plating can control its appearance.
Is brass magnetic?
Most common copper-zinc brass alloys are non-magnetic. Confirm the exact grade for magnetic-sensitive equipment because composition, cold work and contamination can affect measured response.
Can brass be used for potable-water parts?
Use a brass grade and finish that meet the applicable potable-water and lead-content requirements for the target market. Provide the required compliance standard during quotation.
How can dezincification be reduced?
Select a dezincification-resistant or suitable lead-free grade and confirm the fluid chemistry, temperature and service conditions before production.