Products

Silver Tungsten Alloy rod, plate

Description

Silver tungsten alloys, also known as silver tungsten carbides, are used in industrial and domestic circuit breaker applications where good weld and erosion resistance is important. The higher silver grades have higher conductivity, and the higher tungsten grades have greater erosion and weld resistance.

High contact pressures are required to ensure effective operation if used for frequent high current switching, and mixed oxides of silver tungsten can be formed to give high contact resistance.

Silver tungsten alloy has proven to be an excellent material because of its ability to resist contact "sticking" or welding and also because of its resistance to oxidation. We produces AgWC materials ranging from 35% silver and 65% tungsten carbide to 60% silver and 40% tungsten carbide. In some instances, it is advantageous to have a combination of tungsten and tungsten carbide mixed with silver. 

Application

Silver tungsten alloys contain between 15-70% silver and are mainly used for electrical contacts—generally heavy-duty devices subject to high current, such as moving contact for circuit-breakers between 100 and 800 A, earth leakage breakers, moving contact for air circuit breaker between 1000 and 10000 A, thermostats, miniature circuit breakers, arcing contact for large size contactors, moulded-case circuit breakers and heavy-load AC/DC contactors, resistance welding electrode etc.
Performance of Silver Tungsten

Name

Chemical Symbol

Chemical Composition(%)

Physical and Mechanical Properties

Ag

Impurity

W

Density/
     
(g/cm3)
     

Hardness
     
HB
     

Resistivity
     
(μΩ·cm)
     

Silver-tungsten (30)

AgW (30)

70±1.5

≤0.5

Allowance

11.75

75

2.3

Silver-tungsten (40)

AgW (40)

60±1.5

≤0.5

Allowance

12.4

85

2.6

Silver-tungsten (50)

AgW (50)

50±2.0

≤0.5

Allowance

13.15

105

3

Silver-tungsten (55)

AgW (55)

45±2.0

≤0.5

Allowance

13.55

115

3.2

Silver-tungsten (60)

AgW (60)

40±2.0

≤0.5

Allowance

14

125

3.4

Silver-tungsten (65)

AgW (65)

35±2.0

≤0.5

Allowance

14.5

135

3.6

Silver-tungsten (70)

AgW (70)

30±2.0

≤0.5

Allowance

14.9

150

3.8

Silver-tungsten (75)

AgW (75)

25±2.0

≤0.5

Allowance

15.4

165

4.2

Silver-tungsten (80)

AgW (80)

20±2.0

≤0.5

Allowance

16.1

180

4.6

Silver-tungsten (85)

AgW (85)

15±2.0

≤0.5

Allowance

16.7

195

5

Technical Parameters of Silver Tungsten Carbide

Material Nominal Composition

Density g/cm³

Hardness HV10

Electrical Conductivity   %I.A.C.S

m/ mm²

WCAg 35

13.0

170

35

20

WCAg 50

12.2

150

39

22

WCAg 60

11.7

140

42

24

Package and Transportation
 We pack silver tungsten alloy in plywood case and send them by ocean or air.
 

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Tungsten Copper Alloy Products
Contact us
Zhuzhou Zhongtuo New Material Co., Ltd
Tel:+86-18073352310
E-mail:sales@zttungsten.com
Add.:No.2 plant, No.23 SANXIN R.D, TianYuan District, Zhuzhou Hunan P.R China
Add.:No.2 plant, No.23 SANXIN R.D, TianYuan District, Zhuzhou Hunan P.R China
Tel:+86-18073352310
E-mail:sales@zttungsten.com