What is C21000 brass?
Copper is relatively easy to mine and refine. It can be obtained from the ores cuprite, chalcocite, malachite, tenorite, covellite, and bornite. Today, the largest consumer of copper is in the building industry.
UNS C21000 is a copper-zinc alloy. It is a type of brass metal with good formability and corrosion resistance.
UNS C21000 Chemical Composition
The chemical composition of UNS C21000 copper alloy is outlined in the following table.
| Elements | Content (%) |
|---|---|
| Copper, Cu | 94-96 |
| Iron, Fe | 0.05 |
| Lead, Pb | 0.05 |
| Zinc, Zn | Balance |
UNS C21000 Physical Properties
The following table discusses the physical properties of copper UNS C21000.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.86 g/cm3 | 0.320 lb/in3 |
| Melting point | 1049°C | 1920°F |
UNS C21000 Mechanical Properties
The mechanical properties of UNS C21000 copper flat products (H01-temper) are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 290MPa | 42 ksi |
| Yield strength | 221 MPa | 32 ksi |
| Elongation | 25% | 25% |
| Shear strength | 221 MPa | 32 ksi |
UNS C21000 Thermal Properties
The thermal properties of C21000 are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-300°C/68-572°F) | 18 µm/m°C | 10 µin/in°F |
| Thermal conductivity (@20°C/68°F) | 234 W/mK | 1620 BTU in/hr.ft².°F |
Equivalent materials to UNS C21000 copper alloy are
ASTM B134
ASTM B36
ASTM B587
ASTM B698
QQ W321
SAE J461
SAE J463
UNS C21000 Fabrication
Machinability - The machinability of copper UNS C21000 alloy is rated at 20.
Welding - Welding methods such as soldering and brazing are ideal for this alloy. However butt welding, oxyacetylene welding and gas shielded arc welding can also be used. Methods like coated metal arc welding, spot welding and seam welding are not recommended.
Forging - The forging temperature for copper UNS C21000 alloy ranges between 760 and 871°C (1400 and 1600° F).
Hot working - Copper UNS C21000 alloy has good hot working abilities, which includes coining, drawing, blanking, piercing and punching, shearing, spinning, squeezing, and swaging, and stamping.
Cold working - Copper UNS C21000 alloy has excellent cold working properties.
Annealing - copper UNS C21000 alloy is annealed at temperatures ranging between 427 and 788°C (800 and 1450 °F).
UNS C21000 Applications
Ammunition components
Coinage
Rectifiers
Lead-in wires
Tokens
Fuse caps
Primers
Base for gold plate
Medallions, emblems, and plaques.
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.
