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Skip to content Custom copper and brass components for electrical, thermal, and mechanical applications. TENGHUI provides in-house CNC milling and turning, supported by sheet metal fabrication and coordinated surface finishing for prototypes and production orders.
Send your drawings, material specifications, and quantity requirements for a quotation and manufacturability review.
Choose a material based on electrical conductivity, thermal performance, machinability, forming requirements, and operating conditions. The required grade, material condition, and stock availability are reviewed during quotation.
| Material Grade | Common Manufacturing Processes | Key Characteristics & Selection Notes | Typical Applications |
|---|---|---|---|
| C11000 Electrolytic Tough-Pitch Copper | CNC milling, turning, cutting, and bending | High electrical and thermal conductivity. Its ductility requires attention to burr control, workholding, and deformation. Formability depends on material condition and thickness. | Electrical terminals, conductive plates, busbars, and thermal components |
| C10200 Oxygen-Free Copper | CNC machining and selected fabrication processes | High-conductivity, oxygen-free copper for applications with specific purity, joining, or operating requirements. Material specifications should be confirmed before production. | Vacuum equipment components, electrical contacts, thermal components, and electronic equipment parts |
| C36000 Free-Cutting Brass | CNC turning and milling | Excellent machinability for detailed features and threaded parts. This is a lead-containing brass; projects with lead-content restrictions require a separately specified material. | Threaded fittings, inserts, spacers, fasteners, and precision turned components |
| C26000 Cartridge Brass | Cutting, stamping, bending, and drawing | Good cold-forming capability in suitable material conditions. Less suited to high-speed machining than free-cutting brass. | Formed contacts, stamped components, covers, and decorative hardware |
| C26800 Yellow Brass | Cutting, stamping, and bending | Suitable for a range of formed sheet components. Bend geometry, material condition, and surface requirements should be reviewed together. | Sheet metal parts, formed hardware, trim, and equipment components |
*Material grades are not automatically interchangeable. If your drawing specifies a different national or international designation, include the applicable standard so composition and material condition can be checked.
The following comparison provides general selection guidance. Actual properties depend on material grade, condition, product form, thickness, and manufacturing history.
| Selection Factor | C11000 Copper | C10200 Oxygen-Free Copper | C36000 Brass | C26000 / C26800 Brass |
|---|---|---|---|---|
| Main Advantage | Electrical and thermal conductivity | Conductivity with specified oxygen-free composition | Efficient machining of detailed components | Cold forming of sheet components |
| Electrical Applications | Common choice for conductive parts | Selected where oxygen-free copper is specified | Conductive, but substantially less conductive than pure copper | Used where forming and mechanical requirements suit the application |
| CNC Machining | Requires careful chip and burr control | Requires careful chip and burr control | Well suited to milling and turning | Machinable, but less free-cutting than C36000 |
| Bending & Forming | Depends on material condition, thickness, and bend radius | Depends on material condition, thickness, and bend radius | Generally not the first choice for extensive cold forming | Common choices in suitable conditions |
| Surface Appearance | Reddish metallic finish; can discolor during exposure | Reddish metallic finish; can discolor during exposure | Yellow metallic finish | Yellow metallic finish |
| Key Selection Consideration | Conductivity, flatness, and contact-surface requirements | Required purity, specification, and joining conditions | Lead content and application suitability | Formability, spring properties, and dimensional requirements |
Surface finishing can help manage tarnishing, wear, solderability, contact performance, and appearance. The appropriate process depends on the material, operating environment, and function of each surface. TENGHUI coordinates finishing requirements with machining and inspection, including coating thickness, masking, and finished dimensions.
Parts retain visible machining marks and the natural color of the material. This is a practical option for functional components that do not require an additional surface coating.
Tin plating is commonly considered for solderable surfaces and electrical connection components. It provides a protective surface layer to help shield the underlying copper substrate.
Provides a protective surface for applications requiring corrosion protection, wear resistance, or a uniform metallic appearance. Electrolytic and electroless options are available.
Selected for high-reliability electrical contacts, RF shielding, and specialized applications requiring low contact resistance and high corrosion immunity.
Chemical inhibition treatments help delay oxidation and cosmetic discoloration during manufacturing, shipping, clean-room handling, and temporary storage.
Mechanical buffing and chemical brightening reduce roughness and elevate gloss for visible architectural hardware, precision instrumentation, and decorative trim.
Produces an even, non-reflective satin texture while subduing machining tool marks. Texture density is tailored using specific media and air-pressure parameters.
Specialized clear lacquers and sealants help preserve polished copper/brass coloration against atmospheric sulfur, fingerprints, and ambient oxidation.
Copper and brass offer different combinations of conductivity, machinability, formability, and appearance. Selecting the right grade helps balance component function with manufacturing cost.
Copper is commonly selected when electrical or thermal conductivity is the main requirement. Brass may be more suitable when machinability, threaded features, appearance, or forming performance takes priority.
The specific grade matters. Free-cutting brass and forming brass have different manufacturing characteristics, so the choice should follow the component’s function and drawing requirements.
Selected CNC-machined features can achieve tolerances as tight as ±0.01 mm, subject to engineering review.
Achievable tolerances depend on part size, geometry, material condition, workholding, and surface finishing. Sheet metal and bent components require separate tolerance assessment.
Mark critical dimensions, fits, flatness, and inspection requirements on your 2D drawing. Dimensional reports and CMM inspection can be discussed during quotation.
The finish depends on contact conditions, solderability, operating environment, and service requirements.
Tin may be considered for solderable surfaces and electrical connections. Nickel, silver, or gold may suit other functional requirements. No single finish is best for every electrical component.
Please specify coating thickness, contact surfaces, masking areas, and any required performance tests.
We plan tooling, machining sequence, and workholding around the part’s geometry and material condition. Deburring and inspection focus on features such as hole edges, slots, threads, and contact surfaces.
For thin or easily distorted parts, the design and inspection method may need additional review. Identify sensitive edges and areas where loose burrs are unacceptable on your drawing.
Copper busbars can be reviewed for cutting, drilling, machining, bending, and plating according to the drawing.
Please provide the material grade and condition, thickness, bend dimensions, hole locations, contact-surface requirements, and finish specification.
If insulation or electrical testing is required, include the applicable requirements so the manufacturing and inspection scope can be evaluated before quotation.
No. C36000 is a lead-containing free-cutting brass.
If your project has lead-content restrictions, state them in your inquiry. A suitable material must be specified and confirmed rather than assuming that different brass grades are interchangeable.
Straightforward CNC prototypes can often be completed in approximately 3–7 working days. Medium and larger production orders commonly require around 15–20 working days.
Material availability, complexity, plating, and inspection requirements affect the schedule. Lead times for formed parts and specialized materials are reviewed separately.
The delivery plan is confirmed after reviewing your files and order requirements.
Please provide:
If the exact material or finish is undecided, describe the application so manufacturing options can be reviewed.
Upload your 2D drawings (PDF/DWG/DXF) and 3D CAD files (STEP/IGES). We evaluate part geometry, materials, and tolerances within 24 hours.
Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.
