With high strength, good formability, elasticity, resistance to stress relaxation, excellent corrosion resistance, superior electrical conductivity, and high beryllium-free safe cost, economical, and no heat treatment required, good stampability, C70250 (silicon bronze) is a copper alloy with added nickel, forming beryllium-free bronze alloys to hold exceptional properties. This alloy is also aesthetically appealing while maintaining good conductivity and high resistance to thermal and oxidation, with good resistance to ductility, fatigue, hardness, excellent strength, and good capabilities in plating and welding.

Properties Of Copper Alloy C70250 Relay Contact Sheet

• Density: 8.83 g/cm³

• Electrical conductivility: 40 IACS%(20°C)

• Modulus of elasticity: 130 GPa

• Coefficient of thermal expansion: 17.7 10-6/K

• Thermal conductivity: 190 W/(m*K)

• Tensile Strength: 608 - 860 MPa

• Yield Strength: ≥450 - 720

• Elongation: ≥5% - 10%

• Hardness HV: 180 - 260

• Bending Test(90°): GW(0 - 3); BW(0 -3)