Tungsten Alloys Properties

tungsten alloy mechanical physical properties specifications chemistry

Tungsten Alloys are alloys with a high Tungsten content above ninety percent by weight. Below are the physical and mechanical properties of Tungsten Alloys we supply.

Tungsten Alloy are commonly referred to as Heavy Metal Tungsten Alloy.  ASTM B777 defined four different classes for this alloy. The classes are differentiated by their nominal densities.

They can be supplied as either a magnetic or non-magnetic. The difference is the use of either Iron or Copper as a binder. The magnetic variation uses Iron as the binder. If non-magnetism is needed, Copper is used as a binder. Ed Fagan Inc. stocks Tungsten Alloy under the name EF 17. It is named for it’s specific gravity, which is a nominal 17 gm/CC.  It is specified in ASTM B777 as Class 1.

We also can source Class 2 (17.5 gm/cc), Class 3 (18 gm/cc), Class 2 (18.5 gm/cc).  Call us at 1-800-628-6268 if you require these densities.

Heavy Metal Tungsten Alloys have particularly high density which:

  1. give it the ability to absorb radiation and can be a more environmentally friendly alternative to Lead as a shield.
  2. make it  the ideal material for a wide range of applications found in aerospace, automotive, medical engineering, and construction industry.
  3. are used for vibration damping in machine tools.

Benefits of Heavy Metal Tungsten Alloys

  • High density of 17.0 to 18.8 g/cm3 (similar to pure Tungsten)
  • Better machinability compared to pure Tungsten
  • Inexpensive manufacture of complex products and components
  • High Young’s modulus and very good mechanical properties
  • High absorption capacity for X-rays and gamma rays
  • Harmless to the health and environment

For a Tungsten Alloy data sheet, or any other Refractory Metals & Alloys data sheets, please go to our Alloys and Metals Literature Library section.

Tungsten Alloys Properties   
EFI GradeEF17EF175EF18EF185
ASTM B777-15Class 1Class 2Class 3Class 4
Nominal % Tungsten9092.59597
Nominal Density GM/CC17.0017.5018.0018.50
Minimum* Ultimate Tensile Strength UTS (KSI)110110105100
Minimum* Elongation %5532
Modulus of Elasticity (KSI)45,00048,00050,00052,000

*Note: Non-magnetic compositions (N) conforming to EF17, EF175 and EF18 shall have minimum properties of 94 KSI minimum ultimate tensile strength. Minimum elongation shall be 2 percent on EF17 and EF175 and 1 percent on EF18.

Tungsten Heavy Metal Alloys Physical Properties        
EFI GradeEF17EF17EF175EF175EF18EF18EF185
Class 1Class 1Class 2Class 2Class 3Class 3Class 4
Composition90% W90% W92.5% W95% W95% W95% W97% W
6% Ni7% Ni5.0% Ni5.25% Ni3.5% Ni3.5% Ni2.1% Ni
4% Cu3% Fe2.5% Cu2.25% Fe1.5% Cu1.5% Fe0.9% Fe
Tungsten Heavy Metal Alloys
ASTM B777-15AMS 7725CMIL T-21014SAE-AMS T-21014

For additional information on specifications of the materials distributed by Ed Fagan Inc., please visit the websites of the international standards organizations that develops and publishes technical standards, ASTM International and ASM International.