Shanghai Unique Alloy Co.Ltd 

Focus on Copper Alloy 

C54400 Free Cutting Phosphor Bronze


Diameter: min.1.0mm 


Chemical Composition:

Sn: 3.50-4.50%
Pb: 3.50-4.50%
Zn: 3.50-4.50%
P:  0.01-0.50%
Fe: 0.10% Max.
Zn: Balance

Note: Copper plus additions equal 99.50% minimum.


Typical Physical Properties:
Specific Gravity: 8.89 g/cm3
Coefficient of Thermal Expansion per °C: 17.30 x 10-6 (20-300°C)
Electrical Conductivity (% IACS): 19.00 % @ 68 F
Thermal Conductivity: 50.00 Btu · ft/(hr · ft2·oF)at 68F
Modulus of Elasticity in tension: 15000 ksi

1). the units are based upon US Customary.
2). the typical physical properties apply to age hardened products.

International Specification:

Rods/Bars: UNS.C54400, CDA544, ASTM B139, B103
European Standards: CuSn4Zn4Pb4,JIS H3270, EN 12164 CW 456 K