Tungsten-based composites are high-strength refractory metal materials manufactured through a tightly controlled process that includes pressing, sintering, and infiltration of copper or silver.

They have strong heat resistance, arc resistance, wear resistance, and deformation resistance during high-temperature welding, flash butt welding and spot welding. They also have excellent electrical and thermal conductivity. The properties of tungsten composites are related to the ratio of copper/silver to tungsten. If the tungsten content is increased, the arc and wear resistance are improved, but the thermal and electrical conductivity are reduced. Due to their unique properties, tungsten-based composites are widely used in applications that require a combination of good electrical and thermal conductivity and low thermal deformation, such as:

Electrical contacts

heat sink

EDM and ECM electrodes

AgW75, this composite material is one of the high refractory content tungsten-silver materials made by the press sintering infiltration method. It usually has high resistance to arc erosion. It is commonly used as an arc-quenching contact in large air and oil circuit breakers, line disconnects, reclosers, and high-current switches and contacts. The contact resistance is low enough to protect the higher conductivity current-carrying contacts from arc damage. Its resistance to welding makes it a good short-circuit contact for bimetallic protection of circuit breakers.

AgW70 and AgW50, these composites contain more silver than AgW75, providing higher conductivity and lower contact resistance. They are widely used in various circuit breakers. In this application, a single pair of contacts serves a dual function: carrying current without overheating, and interrupting current flow without excessive arc corrosion. They are also used for high-current contacts where resistance to contact welding and arc erosion is required. They resist metal transfer in a variety of DC applications.

AgW50, this composite material has the highest silver content among pressed-sintered-pressed tungsten silver materials. It has good resistance to contact welding and is used for current-carrying contacts in power circuit breakers with high transient currents.

Properties for our tungsten silver products

Composites

Nominal composition (% Weight)

Density (g/cm3, ≥)

Electrical resistivity (20ºC, μΩ.cm, ≤)

Electrical conductivity (IACS%, ≥)

W50Ag

50W, 50Ag

13.15

3.0

57

W55Ag

55W, 45Ag

13.35

3.2

54

W60Ag

60W, 40Ag

14.00

3.4

51

W65Ag

65W, 35Ag

14.50

3.6

48

W70Ag

70W, 30Ag

14.90

3.8

45

W75Ag

75W, 25Ag

15.40

4.2

41

W80Ag

80W, 20Ag

16.10

4.6

37

Specifications for our tungsten silver products

Type

Length (mm)

Width (mm)

Thickness (mm)

Diameter (mm)

Rod

2 ~ 300

2 ~ 320

Plate

10 ~ 300

10 ~ 300

2 ~ 200

Other parts

Cube, ring,  block, electrode and other customized parts

Silver
Tungsten Silver Parts
Tungsten Copper Electrode
Tungsten Copper Electorde
Tungsten Caribide Silver
Tungsten Carbide Silver

Edgetech Industries LLC offers copper tungsten, copper tungsten carbide, silver tungsten and silver tungsten carbide in various compositions for high pressure and high temperature applications. We offer tungsten-copper parts for EDM and resistance welding, and we also make custom heat sinks for the semiconductor sector. The composition of tungsten composites can be customized.

Tungsten composite products include:

Material: tungsten copper, tungsten copper carbide, tungsten silver

Ingredients: Customized containing tungsten 50-90%

Special-shaped products: sheets, plates, rods, bars, plates, etc.

Customized parts: radiators, electrical contacts, resistance welding electrodes, parts according to drawings

Please send your request to sales@edge-techind.com.