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BZ4 | CuSn4Pb4Zn4 | C54400

CuSn4Pb4Zn4

BZ4 | CuSn4Pb4Zn4 | C54400
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  • ISO composition : CuSn4Pb4Zn4
  • European standards :

    CW456K 

  • UNS :

    C54400

  • Other norms :

    AMS 4520

Product forms

Wires & Small Rods

Applications

Industry parts for high temperature, pressure and wear resistance
High performance electric connectors

BZ4 | CuSn4Pb4Zn4 | C54400 | CW456K | AMS 4520 key properties 

BZ4 | CuSn4Pb4Zn4 | C54400 | CW456K | AMS 4520 is a multi‑alloy bronze combining tin, lead and zinc, engineered for applications requiring high strength, excellent wear resistance and good machinability. Its balanced composition makes it particularly suitable for precision components where durability and dimensional consistency are essential. Designated as CW456K, this alloy meets established requirements for wrought bronzes used in high‑performance mechanical and electrical applications. 

BZ4 | CuSn4Pb4Zn4 | C54400 | CW456K | AMS 4520 exhibits good corrosion resistance, including resistance to stress corrosion in industrial, rural and marine environments, ensuring reliable performance in demanding conditions. Designed for cold working, soldering and welding operations, this alloy enables the production of complex components with consistent mechanical behavior and good surface quality. Aligned with AMS 4520, BZ4 confirms its suitability for applications requiring durable performance and reliable machinability. 

As a multi‑alloy bronze, BZ4 delivers a balanced combination of strength, wear resistance and machinability, making it a dependable solution for precision components and electrical applications. 

Designation
Available forms
Composition
UNS
AMS & ASTM
Other norms
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BZ4
CuSn4Pb4Zn4

C54400

AMS 4520

CW456K

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datasheet
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BZ4 | CuSn4Pb4Zn4 | C54400 | CW456K | AMS 4520 applications 

Electrical connectors 
BZ4 | CuSn4Pb4Zn4 | C54400 | CW456K | AMS 4520 is used for spring contacts in electrical connectors and coldworked parts, where durability, wear resistance and machinability are essential.