What is C21000 brass?
C21000 brass strip possesses excellent corrosion resistance, is not easily corroded or oxidized by seawater, and is therefore widely used in the marine industry. Secondly, this material exhibits excellent electrical and thermal conductivity, making it suitable for the manufacture of marine cables, electrical appliances, and heat exchangers. Furthermore, C21000 brass strip has good processing properties, allowing it to be manufactured into various shapes and specifications through cold rolling, hot rolling, and other processing techniques to meet the needs of different fields.
Key Features
High Conductivity: 56% IACS, ideal for electrical components.
Corrosion Resistance: Stable in atmosphere, freshwater, and seawater.
Machinability: Suitable for cold/hot working, welding, and forging.
Eco-Friendly: RoHS-compliant, Pb ≤0.03%47.
Product Forms & Dimensions
|
Form |
Size Range |
|
Rod |
Diameter 1mm–350mm, Length 0.5–30m |
|
Plate |
Thickness 0.5–80mm, Width 650–2000mm |
|
Wire |
Diameter 0.1–15mm, Coil ≥5kg |
|
Tube |
OD 6–530mm, Wall Thickness 0.5–50mm |
|
Strip |
Thickness 0.1–3mm, Width ≤305mm |
Chemical Composition
|
Element |
Content (%) |
Standard Range |
|
Cu |
95.0–97.0 |
Main Component |
|
Zn |
Balance |
Balance |
|
Pb |
≤0.03 |
JIS H 3100-2018 |
|
Fe |
≤0.10 |
|
|
Impurities |
≤0.2 |
Physical Properties
|
Property |
Value/Description |
|
Density |
8.86 g/cm³ |
|
Melting Point |
950–1000℃ |
|
Electrical Conductivity |
56% IACS |
|
Thermal Conductivity |
135 W/(m·K) |
|
Thermal Expansion |
10×10⁻⁶/℃ (20–300℃) |
Mechanical Properties
|
Condition |
Tensile Strength (MPa) |
Elongation (%) |
Hardness (HRB) |
|
Annealed |
≥205 |
≥33 |
50 HRB |
|
1/4 Hard |
225–305 |
≥23 |
70 HRB |
|
Hard |
≥305 |
- |
85 HRB |
Core Advantages
Cost-Effective: Higher strength than pure copper at lower cost.
Versatility: Supports cutting, heat treatment, and custom processing.
Certifications: Meets international environmental standards.
Applications
Electrical: Busbars, cables, connectors.
Heat Exchangers: Condenser tubes, radiators.
Architecture: Decorative panels, hardware.
Processing Guidelines
Hot Working: 820–870℃, avoid intermediate brittleness (200–700℃).
Annealing: 600–700℃ to relieve stress.
Cold Working: Control deformation to prevent cracking.
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.
