W-200 (CW112C)

Copper Nickel Silicon (CuNiCrSi).

W-200 is a heat treated copper alloy with high mechanical values for strength and conductivity. A very good alternative to copper alloys that contains beryllium, however a slightly softer alloy.

Areas of use
Electrodes for resistance and spot welding, dies, die casting ram, details for plastic mould injection tool








Chemical composition (nom.)
– Cu Rest
– Ni >2.5%
– Si 0.7-1.0%
– Cr <0.6%

Max impurities:                                                                                                                                                                 – Other 0,5% max

Physical properties (nom.)
Mean linear coefficient of thermal expansion (10-6/K): 16
Thermal conductivity (W/mK): 200
Electrical conductivity (m/W ohm mm²): 26-28
Elastisity modulus E (kN/mm²): 137
Density (g/cm3): 8.7

Mechanical properties
Yield strength (Rp N/mm²): 475-517 N/mm²
Tensile strength (Rm N/mm²): 655-689 N/mm²
Elongation in % A5: 9.0-13.0%
Hardness/Brinell: 217-240 HB
Hardness/Rockwell: 90-95 HRB

Additional information