What is C21000 brass?
C21000 copper alloy is a high-performance copper-based material composed primarily of copper (Cu) as the base element, with small additions of other metallic elements to optimize its properties. Thanks to its unique compositional design, this alloy demonstrates excellent performance in electrical conductivity, thermal conductivity, and mechanical properties. With copper content exceeding 90%, it retains strong foundational conductive and thermal properties, while the precise ratio of trace alloying elements further enhances its performance in specific application environments.
Scientific Basis for Composition and Performance
Dominant Role of Copper: As the primary component of C21000, copper's high electrical and thermal conductivity forms the basis of the alloy's performance. Its atomic structure and electron configuration make it an outstanding conductive material widely used in power and electronics industries.
Optimization Through Trace Elements: In addition to copper, C21000 contains small amounts of other metallic elements such as zinc and tin. These additions not only increase the alloy's mechanical strength but also improve its corrosion resistance and workability. Precise control over the proportions of these trace elements is essential to ensure stable alloy performance.
Strict Control Over Composition Purity: To guarantee stable performance of C21000, the purity of its composition is strictly controlled during production. The absence of harmful impurities ensures that the alloy's performance does not degrade over time due to contaminant effects.
Composition Uniformity and Quality Consistency: The compositional uniformity of C21000 is a key factor in ensuring consistent quality. Advanced production processes and rigorous quality control measures ensure homogeneous composition and stable performance across all production batches.
Application Scenarios of C21000 Copper Alloy
Thanks to its excellent properties, C21000 is widely used across multiple industries. In electronic component manufacturing, its high conductivity makes it an ideal material for connectors, terminals, and similar parts. In power transmission applications, its combination of conductivity and mechanical strength makes it the preferred choice for high-voltage cables, busbars, and other components. Furthermore, in architectural decoration and automotive manufacturing, C21000 is highly valued for its appealing appearance and superior performance.
Industry Standards and Considerations
When selecting and using C21000 copper alloy, relevant industry standards must be followed. For example, electrical conductivity requirements should be tested and evaluated according to applicable national or international standards. During processing, parameters such as working temperature and speed must be carefully controlled to ensure optimal performance. Additionally, for components exposed to harsh environments over extended periods, regular maintenance and care are necessary to prolong service life.
C21000 vs. C11000
| Property | C21000 (Gilding Metal) | C11000 (ETP Copper) | Key Difference |
|---|---|---|---|
| Composition | 95% Cu, 5% Zn (Alloy) | 99.9% Cu (Pure metal) | C11000 is essentially pure copper. |
| Color | Red-gold | Classic copper red | C11000 has the distinctive reddish color of pure copper. |
| Mechanical | Higher strength than pure copper, excellent ductility | Lower strength, very high ductility and malleability | C21000 is stronger; C11000 is softer and more malleable. |
| Conductivity | ~80-85% IACS | ~101% IACS (Standard) | C11000 has significantly superior electrical/thermal conductivity. |
| Corrosion Resistance | Good | Excellent | Pure copper (C11000) generally has better overall corrosion resistance. |
| Primary Uses | Decorative, electrical connectors, jewelry | Electrical wire/ busbars, heat exchangers, roofing | C11000 for pure conductivity; C21000 for strength + color. |
| Cost | Lower than pure copper | Higher | C21000 is often a cost-effective alternative when conductivity requirements allow. |
How to Choose:
Choose C11000 when the application is primarily electrical or thermal (busbars, windings, heat exchangers) and requires maximum conductivity, or when pure copper's corrosion resistance is critical.
Choose C21000 when you need a balance of good (but not maximum) conductivity, higher strength than pure copper, and a durable, attractive gold-like appearance for decorative or structural-electrical parts.
Product Range of GNEE
| Product Category | Product Forms | Comprehensive Materials & Standards (UNS / Common Names) |
|---|---|---|
| Copper & Copper Alloy Tubes | Round, Square, Rectangular, Capillary, Coiled, Bundles, Straight Lengths | Pure Copper: C10200 (OFE), C11000 (ETP) Brass: C21000 (Gilding 95%), C23000 (Red Brass 85%), C26000 (Cartridge Brass 70/30), C28000 (Muntz Metal 60/40), C44300, C68700 (Arsenical Aluminum Brass) Bronze: C22000 (Commercial Bronze 90%), C38500 (Architectural Bronze) Copper-Nickel: C70600 (90/10), C71500 (70/30) Others: C12000 (DLP), C12200 (DHP) |
| Copper & Copper Alloy Sheets/Plates | Sheets, Plates, Rolls, Circles/Blanks, Embossed, Perforated | Pure Copper: C11000, C10200 Brass: C26000, C26800, C27200 (Yellow Brass 65/35),C21000 Phosphor Bronze: C51000 (A), C52100, C52400 Nickel Silver (German Silver): C75200 (65-18), C77000 (55-18) Beryllium Copper: C17200, C17500 High Copper Alloys: C19400 |
| Copper & Copper Alloy Rods/Bars | Round, Hex, Square, Flat, Rectangular, Forging Billets, Hollow Bars | Free-Cutting Brass: C36000 (CDA 360) Leaded Brass: C38500, C35600 Naval Brass: C46400, C48200, C48500 Bronze: C22000, C51000, C54400 (Free-Cutting Phosphor Bronze) Copper-Nickel: C71000, C71500 Pure Copper: C11000, C10100 |
| Copper & Copper Alloy Wires | Round, Flat, Square, Stranded, Bare, Tin-Plated, Annealed, Hard Drawn | Pure Copper Wire: C11000 (ETP), C10200 (OF) for magnet wire Brass Wire: C26000, C27200, C21000 Beryllium Copper Wire: C17200, C17500 Phosphor Bronze Wire: C51000, C52100 Resistance Welding Wire: C11000, C18200 (Chromium Copper) Spring Wire: Various tempers of C51000, C52100, C17200 |
| Copper & Copper Alloy Strips/Foils | Thin Strip, Foil (down to 0.05mm), Precision Slit Coils, Shim Stock, Finned Strip | Brass Strip: C26000, C26800, C22000,C21000 Phosphor Bronze Strip: C51000, C51900, C52100, C52400 Pure Copper Strip: C11000, C10200, C12000 Nickel Silver Strip: C75200, C77000 Electronic Alloys: C19400 (Lead Frame), C70250, C70350 Special Alloys: C72500 (Cu-Ni-Sn) |
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Copper product packaging
We are committed to providing comprehensive and reliable packaging solutions for your shipments. For standard products, we employ industrial-grade packaging: copper tubes are lined with moisture-proof paper and packed in sturdy wooden cases or secured with iron strapping; sheets, strips, and foils are sealed with waterproof plastic film, placed on wooden pallets, and reinforced with steel straps; rods and wires are bundled with anti-rust protection. All packaging is designed to withstand long-distance sea freight and multimodal transportation. We also offer customized services such as logo printing, vacuum packaging, or special inner lining protection upon request, ensuring the products arrive in perfect condition.
