What is C21000 brass?
C21000 copper alloy combines high strength with excellent ductility, boasting a tensile strength of 400-500 MPa and an elongation exceeding 10%, making it suitable for both cold and hot working. Its corrosion resistance is outstanding in both freshwater and marine environments, particularly exhibiting strong resistance to stress corrosion cracking. Furthermore, this alloy possesses moderate electrical conductivity (approximately 27% IACS), good thermal conductivity, and good machinability. A dense oxide film can form on its surface, further enhancing its corrosion resistance.
UNS C21000 Applications
1. Plumbing Systems: Widely used in the manufacture of valves, pipe fittings, and pump bodies, benefiting from its resistance to seawater corrosion and dezincification.
2. Machinery Manufacturing: Suitable for wear-resistant parts such as gears, bearings, and nuts; its high strength and toughness meet dynamic load requirements.
3. Architectural Decoration: Commonly used in door and window hardware, sculptures, and decorative panels; the surface can be polished or plated, combining aesthetics and durability.
4. Electrical Applications: As a conductive connector or terminal material, it balances conductivity and cost-effectiveness.
UNS C21000 Physical Properties
| Physical Properties | Metric | English |
|---|---|---|
| Density | 8.86 g/cc | 0.320 lb/in³ |
UNS C21000 Mechanical Properties
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Rockwell B | 70 | 70 | |
| Hardness, Rockwell 30T | 64 | 64 | |
| Tensile Strength, Ultimate | 420 MPa | 60900 psi | |
| Tensile Strength, Yield | 380 MPa | 55100 psi | |
| Elongation at Break | 4.0 % | 4.0 % | In 50 mm |
| Modulus of Elasticity | 115 GPa | 16700 ksi | |
| Poissons Ratio | 0.307 | 0.307 | |
| Machinability | 20 % | 20 % | UNS C36000 (free-cutting brass) = 100% |
| Shear Modulus | 44.0 GPa | 6380 ksi | |
| Shear Strength | 270 MPa | 39200 psi |
UNS C21000 Electrical Properties
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Electrical Resistivity | 0.00000244 ohm-cm @Temperature 1100 °C |
0.00000244 ohm-cm @Temperature 2010 °F |
liquid phase |
| 0.00000310 ohm-cm @Temperature 20.0 °C |
0.00000310 ohm-cm @Temperature 68.0 °F |
annealed | |
| Magnetic Susceptibility | -0.0000125 - -1.00e-6 | -0.0000125 - -1.00e-6 | SI units |
UNS C21000 Thermal Properties
| Thermal Properties | Metric | English |
|---|---|---|
| CTE, linear | 18.0 µm/m-°C @Temperature 20.0 - 300 °C |
10.0 µin/in-°F @Temperature 68.0 - 572 °F |
| Specific Heat Capacity | 0.380 J/g-°C | 0.0908 BTU/lb-°F |
| Thermal Conductivity | 234 W/m-K @Temperature 20.0 °C |
1620 BTU-in/hr-ft²-°F @Temperature 68.0 °F |
| Melting Point | 1050 - 1065 °C | 1920 - 1949 °F |
| Solidus | 1050 °C | 1920 °F |
| Liquidus | 1065 °C | 1949 °F |
UNS C21000 Processing Properties
| Processing Properties | Metric | English |
|---|---|---|
| Annealing Temperature | 425 - 800 °C | 797 - 1470 °F |
| Hot-Working Temperature | 750 - 875 °C | 1380 - 1610 °F |
Our factory
Our factory is a modern, specialized manufacturer of copper and copper alloy products with over 19 years of experience. We integrate R&D, production, and sales into one seamless operation. Equipped with advanced production lines-including continuous casting and rolling, precision drawing, cold rolling, and automated finishing equipment-we strictly adhere to the ISO 9001 quality management system and international standards such as ASTM and EN. We focus on producing high-quality copper tubes, sheets, plates, rods, wires, and strips.
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Copper product packaging
We are committed to providing safe and efficient end-to-end logistics support for every order you place. Upon completion of production, all products are professionally and custom-packaged according to their shape and transportation requirements: copper tubes are lined with moisture-proof padding and secured in reinforced wooden cases or heavy-duty steel strapping; sheets and strips are sealed with waterproof stretch film and fixed on reinforced wooden pallets, with corner protectors added to the edges; wires and rods are bundled and coated with anti-rust protection. All packaging meets export standards and can withstand long-distance sea freight and complex land transportation. We offer a variety of trade terms, including EXW, FOB, and CIF, and collaborate with multiple international logistics companies to arrange door-to-door delivery and provide real-time shipment tracking, ensuring your goods arrive at your designated destination on time and in perfect condition.
