Tungsten Copper Electrical Contacts

Tungsten-Copper alloy is a two-element alloy mainly based on tungsten and supplemented by copper. It is a composite metal material. As metal copper and metal tungsten have a large difference in physical properties, it’s impossible to adopt casting process for production. Now the industry generally uses copper infiltration technology for production. Our infiltration copper technology is of the mostly historical research and skillful manufacturing experience in China.

Physical Properties of Tungsten & Copper

Properties	Density g/cm3	Thermal Expansion Coefficient	Heat Conductivity w/(m·k)	Thermal Capacity J/(kg°C)	Modulus of Elasticity GPa	Poisson Density	Melting Point °C	Strength MPa
Tungsten	19.32	4.5	174	136	411	0.28	3410	550
Copper	8.93	16.6	403	385	145	0.34	1083	120

Except for particular specify, our tungsten copper sheet hold common tolerance, thickness(0,+0.7)mm,length(0,+3)mm.

Physical & Mechanical Properties of Tungsten Copper Alloy Sheeting

Item	Chemical composition % --Cu	Chemical composition %-Impurity	Chemical composition %-W	Density	TRS	Resistivity	Electric Conductivity	Hardness
WCu50	50±2.0	≤0.5	allowance	11.9-12.3	390	≤3.2	≥55	115
WCu40	40±2.0	≤0.5	allowance	12.8-13.0	480	≤3.7	≥47	140
WCu30	30±2.0	≤0.5	allowance	13.8-14.4	790	≤4.1	≥42	175
WCu20	20±2.0	≤0.5	allowance	15.2-15.6	980	≤5.0	≥34	220
WCu10	10±2.0	≤0.5	allowance	16.8-17.2	1160	≤6.5	≥27	260
WCu7	7±2.0	≤0.5	allowance	17.3-17.8	1120	≤7.0	≥26	275