Mosten Alloy Co., Ltd.

Leading Supplier of Molybdenum and Tungsten
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Semiconductor, Solar Energy,
Medical and Aerospace etc.


Tungsten Heavy Alloy

  • Tungsten Heavy Alloy Balls
  • Balance Weight Molds
  • Dart Heads

Tungsten-based high-density alloy is a kind of alloy based on tungsten (85%~99% tungsten content) and added with elements such as nickel, iron, copper, cobalt, molybdenum, chromium.

The density of tungsten heavy alloy is as high as 16.5~19.0g/cm3, which is twice that of steel. Thermal expansion coefficient of tungsten heavy alloy is low, but tungsten heavy alloy has high absorption capacity and high energy ray.

Tungsten heavy alloy belongs to refractory metals.

The classify of tungsten heavy alloy

Due to the different material properties and alloy applications, tungsten heavy alloys can be divided into the following types with different compositions: W-Ni-Fe or W-Ni-Cu, W-Ni-Cu-Fe or W-Cu:

W-Ni-Fe or W-Ni-Cu: They belong to liquid phase-sintered alloys. They are made by mixing three metal powders together and fusing low-melting nickel, iron or copper onto high-melting tungsten.
W-Ni-Fe and W-Ni-Cu not only retain the advantages of tungsten but also improve the disadvantage of pure tungsten that is hard and fragile.

W-Cu: It belongs to infiltrated metal. The high melting tungsten is first burned to porous sintered base by high temperature, and then the low melting point copper is melted and penetrated into the tungsten base.
W-Cu has good electrical conductivity and is mainly used as a welding material.

We are a professional supplier of tungsten heavy alloys. We own excellent facilities including hot rolling mills and four-high cold rolling mills. We produce tungsten heavy alloys through rolling, rotary forging, wire drawing and other production processes. The mainly production methods we use are high-temperature infiltration technology, liquid-phase sintering technology and back-casting technology.

The application of tungsten heavy alloy

1. Sporting equipment industry: Tungsten heavy alloy is suitable to be uses as balance weight molds because of its high density and resistance to fragility. Therefore, it is widely used in sporting goods such as dart heads, heavy arrows, golf club heads, and pressure carriers for marine model cabins. Of course, the most common is tungsten alloy darts that are favored by professional players. Tungsten heavy alloy balls can also be used in shotguns.

2. Medical industry: Tungsten heavy alloy has very good performance of radiation shielding. So it can be used to manufacture X-ray and γ-ray shielding materials. Because it is non-toxic and safer to the human body than lead metal as a shielding material, it is an ideal substitute for the lead. Now, tungsten heavy alloy is widely used in the field of radiological medicine. Tungsten heavy alloy is also used in the production of components for CT machines such as tungsten anti-scatter grid, collimators.

Density and Hardness Properties, ASTM B777
Class Tungsten Purity, %  Density, g/cc  Hardness, Rockwell"C", max
Class 1 90 16.85-17.25 32
Class 2 92.5 17.15-17.85 33
Class 3 95 17.75-18.35 34
Class 4 97 18.25-18.85 35
Mainly of tungsten adds powder such as copper, nickel or iron.

Mechanical Properties, ASTM B777
Class Tungsten Purity, %  Ultimate Tensile Strength Yield Strength at 0.2% Off-set Elongation,%
ksi MPa ksi MPa
Class 1 90 110 ksi 758 MPa 75 ksi 517 MPa 5%
Class 2 92.5 110 ksi 758 MPa 75 ksi 517 MPa 5%
Class 3 95 105 ksi 724 MPa 75 ksi 517 MPa 3%
Class 4 97 100 ksi 689 MPa 75 ksi 517 MPa 2%
Mainly of tungsten adds powder such as copper, nickel or iron.

Package Inspection

After the production is completed, we will conduct quality inspection and provide the quality inspection sheet which includes the material name, chemical composition analysis, mechanical properties, dimensions, etc. Our products are packed in specialized export wooden cases. All the products in the cases are separated by moisture-proof paper.

If you would like to purchase tungsten heavy alloy from China, please don't hesitate to Contact Us.