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C21000 copper plates are available in diverse forms (sheets, coils, panels) with the following standard dimensions:
Notes:
- Thin sheets/coils (0.01–2.0 mm thickness) are also produced for precision applications .
Tolerances are tightly controlled (e.g., ±0.02 mm for thin strips) .
International Standards
C21000 copper plates conform to the following global standards:
Key Cross-References:
- ASTM C21000 ↔ GB H95/H96 ↔ JIS C2100 ↔ DIN CuZn5 .
- ASTM B152-2009 and JIS H3250-2006 also apply to general brass plate specifications
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:
Key Points:
- C21000 is distinct from nickel-containing alloys (e.g., [31] incorrectly mention nickel; this appears to be an error, as other ASTM sources confirm it is a Cu-Zn alloy).
The alloy is often referenced as H95 in Chinese standards (GB/T 5231) and CuZn5 in European standards [35](#user-content-ref-22).
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
C21000 copper plate production process and product advantages:
1. Production process
Basic processing flow:
The production of C21000 copper plate follows the typical copper alloy plate and strip process, which mainly includes the following steps:
Ingot supply and smelting: The raw materials are formed into alloy ingots through batching and smelting.
Hot rolling and cold rolling: Hot rolling is carried out at 775~850℃, and then cold rolling further refines the material structure.
Annealing and pickling: The annealing temperature is controlled at 540~600℃ to eliminate internal stress and improve ductility; pickling is used to remove the surface oxide layer.
Finishing and finishing: The dimensional accuracy and surface quality of the plate are ensured through multiple passes of finishing and straightening.
Inspection and packaging: The final product must be packaged and stored after mechanical property testing and surface inspection.
Special process requirements:
The annealing process after hot working is crucial to the ductility of the material, and the annealing temperature must be strictly controlled at 540~600℃.
Some manufacturers (such as Jintian Copper) use horizontal continuous casting technology to improve the uniformity of ingots.
2. Product advantages
Excellent mechanical properties:
High strength and high ductility: tensile strength ≥ 205 MPa, elongation δ10 ≥ 35%, suitable for high-load scenarios.
Good hot and cold processability: supports a variety of forming processes such as cold bending, stamping, forging, etc., suitable for complex parts manufacturing.
Physical and chemical properties:
Electrical and thermal conductivity: copper content reaches 95%, and the conductivity is close to pure copper, suitable for electrical components and heat exchangers.
Corrosion resistance: excellent performance in marine environment and humid conditions, suitable for ship hardware and outdoor buildings.
Environmental protection and versatility:
Low-lead environmental protection options: Some manufacturers provide low-lead or lead-free products that meet EU RoHS standards to meet environmental protection requirements.
Diversified applications: from key blanks, gaskets to electronic connectors, artworks, covering industrial and consumer fields.
Process adaptability:
Support customized production, including material hardness, thickness, surface treatment, etc., to meet the needs of different customers
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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