Copper-Zinc Alloy C21000 – Electrical Materials

UNS C21000 copper-zinc alloy is best known for its excellent corrosion resistance. C21000 possesses superior corrosion resistance, good deep-drawing properties, ductility, and moderate electrical conductivity, while also exhibiting good strength. Typical applications of C21000 include ammunition components, coins, medals, and a wide variety of other applications. C21000 is a copper-zinc alloy that is stronger and more durable than copper alloys. C21000 is a metal with excellent corrosion resistance, ductility, and high electrical conductivity, suitable for industrial and electrical applications.

ASTM B134 – Standard Specification for Brass Wire

ASTM B36 – Standard Specification for Brass Sheets, Sheets, Strips and Rolled Bars

ASTM B587 – Standard Specification for Welded Brass Tubes

SAE J461 – For Cast Copper Alloys to Maintain Electrical and Thermal Conductivity, Mechanical Properties, Yield Strength, Fatigue Characteristics, Formability and Machinability

SAE J463 – Specification for Forged Copper and Copper Alloys

The main components of C21000 brass are copper (Cu) and zinc (Zn), with copper content ranging from 94.0% to 96.0% and zinc as the balance. It also contains trace amounts of iron (Fe<=0.05%), lead (Pb<=0.05%), nickel (Ni=0.5%), and other elements, with the total impurities not exceeding 0.3%. This composition design allows C21000 brass to maintain high strength while also possessing good electrical and thermal conductivity and corrosion resistance.

Density: Approximately 8.86 g/cm³.

Electrical Conductivity: >=54% IACS (International Standard for Annealed Copper), with a conductivity up to 31.32 MS/m.

Thermal Conductivity: 234 W/(m·K), exhibiting excellent thermal conductivity.

Coefficient of Thermal Expansion: 18.0 × 10⁻⁶/K.

Elastic Modulus: 115 GPa.

Electrical Industry: Used in the manufacture of wires, cables, electrical connectors, etc. Its high conductivity ensures efficient current transmission.

Thermal Industry: Used in the manufacture of radiators, heat exchangers, etc. Its high thermal conductivity facilitates rapid heat transfer and dissipation.

Automotive Industry: Used in the manufacture of various fasteners, decorative parts, etc. Its high strength and wear resistance ensure long-term stable operation of components.

Construction Industry: Used in the manufacture of water pipes, heating pipes, decorative materials, etc. Its corrosion resistance and aesthetics allow these components to be used for a long time in harsh environments while maintaining a good appearance.

Marine Industry: Due to its excellent corrosion resistance and resistance to seawater corrosion and oxidation, C21000 brass has wide applications in marine cables, electrical appliances, and heat exchangers.

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.