Iron Tungsten Contact
Iron Tungsten Contact of soft, high-conductivity materials used as the makeup of electrical components. They are the materials in a system through which an electrical current flows; such as:

  • Circuit breakers
  • miniature circuit breakers
  • earth leakage breakers
Iron Tungsten Contact comes in a variety of sizes. You can find options both small to extremely large, depending on your voltage requirements and usage.
Iron Tungsten Contact are typically made from any metal with high electrical conductivity. However, in applications such as high-power equipment where mechanical wear is expected, a conductive metal may be used. Common electrical contact materials include:
  • Silver
  • Copper
  • Gold
  • Brass

Iron Tungsten Contact Material Properties

When choosing the best Iron Tungsten Contact for your application, it is important to keep in mind the Four most important properties:

  • Electrical Conductivity
  • Corrosion Resistance
  • Hardness
  • Density

Iron Tungsten Contact Conductivity

Conductivity refers to the measure of a materials ability to conduct or carry an electric current. You will see this as a percent of a Iron standard , which has the highest conductivity. The tungsten content is designated by the first number e.g. AgWC50 in weight percent.

Corrosion Resistance

Corrosion resistance of contacts refers to a material’s ability to resist chemical decay. Any material with little corrosion resistance will decay faster than ones with high resistance.


This measures how resistant materials are to various kinds of permanent deformations from an applied force. It is dependant on five factors:

  • Ductility
  • Elasticity
  • Plasticity
  • Tensile Strength
  • Toughness
Tungsten composition
  • Silver Tungsten
  • Silver Tungsten Carbide


This information refers to silver based contact material with tungsten as the second main component manufactured by inifitration of molten silver into a porous tungsten preform.


The tungsten content is designated in weight percent. It can be adjusted between 40 to 8o %


  • circuit breakers
  • earth leakage breakers
  • miniature circuit breakers
  • power Line relays


  • lowest arc erosion of all contact materials
  • low electrical conductivity
  • high contact resistance by formation of tungsten oxides as well as silver-tungsten
  • poor arc migration properties
  • very hard


A higher amount of tungsten leads to a more regulat’ distribution of the components.

Physical Properties

Material AgW40 AgW50 AgW60 AgW65 AgW70
Density [g/cm3] 12.5 13.2 14.0 14.4 14.9
Electrical Conductivity [m/(Ω.mm2)] 41 38 34 32 31
Hardness Soft [HRB] 50 80 85 90 90
RS Alloys and Metals Pvt Ltd. Iron Tungsten Contact offering includes Iron Tungsten Contact, Tungsten Contact, Iron Rivets Tungsten Contact, Tungsten Contact Electrical, tungsten contact point, Steel Tungsten Electrical Contacts