C21000 brass Dimensional Specifications
C21000 copper wire is available in round wire form, with diameter ranges depending on manufacturing capabilities:
Standard diameter range: 0.05 mm to 40 mm .
Customizable sizes: Some manufacturers offer diameters from 0.03 mm to 3 mm, tailored for specialized applications like electronics and fine instrumentation .
Note: Flat or tubular forms (e.g., flat copper tubes) are excluded as per the user's request.
International Standards
C21000 copper wire complies with the following key international standards:
| Standard | Region/Organization | Specification |
|---|---|---|
| ASTM B134/B134M | USA | Covers round, hexagonal, and rectangular brass wire, including C21000 . |
| JIS C2100 | Japan | Equivalent to C21000, specifying brass wire for electrical and mechanical uses . |
| EN CuZn5 | Europe | Defines brass wire with 94–96% Cu (C21000 equivalent) . |
| GB/T 5231 | China | Corresponds to H95 brass, equivalent to C21000 in composition and properties . |
Additional standards include SAE J461/J463 (USA) and ISO 426-1 (international), which align with C21000's mechanical and chemical requirements
Chemical Composition
C21000 is a high-copper brass alloy (also classified as "red brass") with a primary composition of copper (Cu) and zinc (Zn), along with trace elements. The exact chemical limits are standardized under ASTM specifications such as ASTM B36/B36M and ASTM B587. Here is the detailed composition:
| Element | Content Range (wt%) | Notes |
|---|---|---|
| Copper (Cu) | 94.0–96.0% | Primary constituent |
| Zinc (Zn) | Balance | Typically 4–6% (residual) |
| Lead (Pb) | ≤0.05% | Strictly controlled impurity |
| Iron (Fe) | ≤0.05% | Impurity limit per ASTM B36 |
| Other Impurities | ≤0.3% (total) | Includes P, Sb, Bi, etc. [1](#user-content-ref-4), [3](#user-content-ref-6), [18](#user-content-ref-12), [31](#user-content-ref-22) |
Mechanical Properties
C21000 exhibits a combination of high strength, ductility, and excellent cold-working capabilities. Properties vary depending on temper (annealed, cold-rolled, etc.):
Typical Room-Temperature Mechanical Properties
| Property | Annealed (Soft) State | Cold-Worked (Hard) State |
|---|---|---|
| Tensile Strength (σb) | 205–290 MPa | 400–610 MPa |
| Yield Strength (σ₀.₂) | 70–120 MPa | 350–400 MPa |
| Elongation (δ) | 35–42% (δ10) | 10–25% (δ10) |
| Shear Strength | 221–260 MPa | – |
| Hardness (Rockwell B) | 20–48 HRB | 60–85 HRB |
Applications of C21000 Copper
Due to its excellent performance, C21000 copper is widely used in various industrial fields. In electronic component manufacturing, its high conductivity makes it an ideal material for connectors, terminals, and other components. In the power transmission field, the conductivity and mechanical strength of C21000 copper make it the first choice for high-voltage cables, busbars, and other components. Furthermore, in the fields of architectural decoration and automotive manufacturing, C21000 copper is also highly favored for its aesthetic appearance and superior performance.
Our factory
Our supply scope covers a comprehensive range of high-performance copper and copper alloy products tailored to diverse industrial applications. We provide precision-engineered copper tubes for HVAC and refrigeration systems, sheets and plates for architectural cladding and electrical components, rods and bars for machining and fabrication, wires for conductive and mechanical purposes, as well as strips and foils for electronic and automotive industries. All products are available in various alloys - including pure copper, brass, bronze, phosphor bronze, copper-nickel, and specialty alloys - and can be supplied in standard sizes or customized dimensions, tempers, and finishes to meet your exact specifications.
