C65500 Silicon Bronze

Chemical Composition:

Si: 2.80-3.80%

Ni+Co: 0.6%Max
Mn: 0.50-1.30%
Fe: 0.80% Max.
Zn: 1.50% Max.
Pb: 0.05% Max.
Cu: Balance
Note: Copper plus additions equal 99.50% minimum.

Typical Physical Properties:

Specific Gravity: 8.53 g/cm3
Coefficient of Thermal Expansion per °C: 18 x 10-6 (20-100°C)
Electrical Conductivity (% IACS): 7 % @ 68 F
Thermal Conductivity: 21.0.0 Btu · ft/(hr · ft2·oF)at 68F
Modulus of Elasticity in tension: 15000 ksi

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

International Specification:

Rods/Bars: UNS.C65500, CDA655, ASTM B98 / B124

Wire: ASTM B99, B105

European Standards: CuSi3Mn1, DIN EN 13347/14640, CW116C to EN