Copper tungsten materials

Copper tungsten alloy product is a sintered copper-tungsten material manufactured by powder metallurgy. It forms dense composite offering hardness, wear resistance and a high softening temperature of tungsten combined with the good electrical conductivity of copper.

Copper tungsten may be used as an electrical contact material. In the most severe applications associated with power generation and transmission the switch may be totally immersed in oil. In these cases there is no advantage in using the tarnish resistant silver-based materials, as oxidation is prevented by the exclusion of air. Copper tungsten contacts are widely used in these cases, the selection of the grade used being dependent on the relative importance of conductivity and arc resistance.

Copper tungsten data sheet

Grade	Cu%(WT)	W%(WT)	RWMA Class	Density (Min)	Electric Conductivity (Min)	Hardness (Min)
CuW55	45±2	Balance	10	12.30g/cm3	55%IACS	125HB
CuW60	40±2	Balance		12.75g/cm3	52%IACS	140HB
CuW65	35±2	Balance		13.30g/cm3	50%IACS	155HB
CuW70	30±2	Balance		13.80g/cm3	49%IACS	175HB
CuW75	25±2	Balance	11	14.50g/cm3	47%IACS	195HB
CuW80	20±2	Balance	12	15.15g/cm3	42%IACS	220HB
CuW85	15±2	Balance		15.90g/cm3	35%IACS	240HB

Copper WC data sheet

Grade	Cu%(WT)	WC%(WT)	Density (Min))	Electric Conductivity (Min)	Hardness (Min)
CuWC50	50±2	Balance	11.04g/cm3	48%IACS	80HRB
CuWC55	45±2	Balance	11.35g/cm3	45%IACS	85HRB
CuWC60	40±2	Balance	11.80g/cm3	38%IACS	90HRB
CuWC70	30±2	Balance	12.56g/cm3	33%IACS	98HRB
CuWC75	25±2	Balance	12.80g/cm3	31%IACS	28HRC
CuWC80	20±2	Balance	13.40g/cm3	28%IACS	34HRC