Features

Ag W is one kind of silver-base electrical contact materials with tungsten frame which is produced by powder metallurgy method. It combines the excellent thermal and electrical conductivities of silver and the high melting point and small burning loss of tungsten. It has high hardness, low mechanical abrasion, excellent arc erosion resistance and fusion welding resistance. The AgW material has high brazed area ratio and welding strength, the small size contact can be used in automotive welding, and the large size contact with brazing material is easy and efficient to weld.

Properties and Application

Material	Density (g/cm3)	Resistivity (μΩ·cm)	Hardness(HB)	Metallography
AgW(40)	≥12.40	≤2.6	≥85
AgW(50)	≥13.15	≤3.0	≥105
AgW(60)	≥14.00	≤3.4	≥125
AgW(65)	≥14.50	≤3.6	≥135
AgW(70)	≥15.40	≤4.2	≥165

The material is mainly applied in medium-/low-voltage circuit breaker, residual current circuit breaker, heavy current switch contact, heavy-duty industrial relay, air circuit breaker, switchgear of the crane controller and switch of electric locomotive etc.