Tungsten Silver Alloy with High Conductivity

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China Mainland
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Description

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Tungsten Silver WAg alloy as high-voltage electrical contact material

Silver Tungsten alloy (W-Ag alloy), The silver and tungsten composite group combines the high thermal and electrical conductivity of silver with the high erosion resistance of the high melting tungsten. These materials are also characterized by their high strength and their resistance to welding or sticking. They are principally made by infiltration and the nominal silver content varies from 20-50%. By increasing the amount of tungsten, the hardness and welding is reduced. This composite group of alloys is specially preferred for use in air.

Silver tungsten contain between 25-50% silver and are mainly used for electrical contacts—generally heavy-duty devices subject to high current. Silver tungsten combines the high thermal and electrical conductivity of silver with the arc resistance of tungsten.

Silver Tungsten ring as electrical contact

Silver Tungsten ring.png

Specification

Grade	Chemical Composition %			Mechanical properties
Grade	Ag	Impurities	W	Density (g/cm3)	Conductivity (IACS)	Hardness (HB=)	Flexural strength (MPa)
AgW40	60±1.5	0.5	Balance	12.4	---	66	85
AgW50	50±2.0	0.5	Balance	13.15	---	57	105
AgW55	45±2.0	0.5	Balance	13.55	---	54	115
AgW60	40±2.0	0.5	Balance	14	---	51	125
AgW65	35±2.0	0.5	Balance	14.5	---	48	135
AgW70	30±2.0	0.5	Balance	14.9	45	150	657
AgW75	25±2.0	0.5	Balance	15.4	41	165	686
AgW80	20±2.0	0.5	Balance	16.1	37	180	726