What is C21000 brass?
First, let's examine the composition of C21000 copper alloy. C21000 is a multicomponent alloy based on copper, with the addition of appropriate amounts of alloying elements such as zinc, nickel, and manganese. Typically, copper accounts for over 90% of its composition, zinc around 5%, and nickel and manganese approximately 1% each. This distinctive composition ratio endows C21000 copper alloy with numerous exceptional properties.
Next, let's explore the characteristics of C21000 copper alloy.
First, it exhibits excellent mechanical properties, such as high strength, hardness, and good wear resistance, making it widely applicable across many fields.
Second, C21000 offers outstanding corrosion resistance, demonstrating strong anti-corrosion capabilities in environments such as the atmosphere, seawater, and various acidic or alkaline conditions.
Third, it possesses excellent electrical and thermal conductivity, enabling its extensive use in electronics, electrical appliances, chemical engineering, and construction industries.
C21000 copper alloy is widely used in electronics, electrical appliances, mechanical manufacturing, chemical equipment, architectural decoration, and other fields. For example, in electronics and electrical appliances, C21000 is utilized in the production of wires, cables, switches, and other components. In mechanical manufacturing, it is applied in wear-resistant parts, gears, shafts, and similar components. In chemical equipment, it is used to manufacture corrosion-resistant pipes, valves, and other parts. In architectural decoration, C21000 is employed in doors, windows, stair railings, and other decorative elements. Finally, let's discuss the prospects of C21000 copper alloy. With continuous technological advancements and increasing demands for the performance of metallic materials, the application areas of C21000 will continue to expand. Particularly in high-end equipment manufacturing, new energy, and new materials sectors, C21000 copper alloy is poised to play an increasingly important role.
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 |
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| Q: What are the mechanical properties of C21000? A: Typical mechanical properties of C21000 (annealed condition) include a tensile strength of about 38–45 ksi (260–310 MPa), yield strength around 10–15 ksi (70–105 MPa), and elongation of 45–55%. Hardness is approximately 45–55 HRB. |
| Q: What is the equivalent of C21000 in European standards? A: C21000 is roughly equivalent to CuZn5 in EN standards (EN 1652) and may correspond to C2100 in JIS (Japanese standards). However, exact equivalents depend on specific composition and application requirements. |
| Q: What is C21000 brass used for? A: C21000 is commonly used in architectural decoration, jewelry crafting, medals, nameplates, electrical connectors, and decorative hardware due to its aesthetic appeal, formability, and good conductivity. |
| Q: Can C21000 be welded or brazed? A: Yes, C21000 can be welded and brazed using appropriate techniques. Oxyacetylene welding, TIG, and resistance welding are suitable, while brazing with silver-based or phosphorus-copper fillers is common. |
| Q: Is C21000 corrosion resistant? A: C21000 offers good corrosion resistance in atmospheric, freshwater, and mild chemical environments. However, it is not recommended for prolonged exposure to seawater or highly acidic/alkaline conditions. |
| Q: What is the difference between C21000 and C26000? A: The primary difference is copper content: C21000 (~95% Cu) is softer and more ductile with a reddish-gold color, while C26000 (~70% Cu) is stronger and more widely used in cartridges and mechanical parts. |
| Q: Where can I buy C21000 brass sheet or strip? A: C21000 products are supplied by specialized metal distributors, mills, and online metal suppliers. Ensure the supplier provides certified Mill Test Reports (MTR) for quality assurance. |
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.
