90W7.5Ni2.5Cu tungsten alloy rod is used where the combination of high heat resistance, high electrical and/or thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. 90W7.5Ni2.5Cu tungsten alloy rod is also used in electrodes for electrical discharge machining and electrochemical machining.
The properties of 90W7.5Ni2.5Cu tungsten alloy rod are:
AMS-T-21014: Class 1
ASTM B777-07: Class 1
AMS 7725 E: Class 1, Type 1
Density: 17.0 g/cc
Magnetic Properties: NIL
Vickers hardness: 300 HV10
Young’s Modulus: 340MPa
Ultimate Tensile Strength: 850 MPa
Yield Strength Min (0.2% offset): 600 MPa
EL, min: 6% 25mm gauge
Application: WHA grade offering the lowest magnetic permeability.
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