Tungsten Heavy Alloy

Tungsten heavy alloys generally are refractory metal which have two-phase composites consisting of W-Ni-Fe or W-Ni-Cu or even W-Ni-Cu-Fe. Some tungsten alloy contains rare earth and/or other metals such as Co, Mo, and Cr, etc. Tungsten heavy alloy have very high melting point and have a density twice that of steel and are more than 50% heavier than lead. Tungsten content in conventional tungsten heavy alloys varies from 90 to 98 weight percent which lead to their high density (between 16.5 and 19.00g/cc). Nickel, iron and/or copper serve as a metal binder matrix, which holds the brittle tungsten grains together and which makes tungsten alloys ductile and easy to machine. Nickel-iron is the most popular additive, in a ratio of 7Ni:3Fe or 8Ni:2Fe (weight ratio).

Typical Applications:
High Energy Radiation Shielding – Nuclear, Medical & Industrial
Counterbalance for Vibration Dampening
Aircraft control surfaces
Auto racing industry
Boring bars
Bucking Bars
Down hole logging-Sinker bars
Engine components
Golf club weights
Helicopter rotor Systems
Ship ballasts

Contact Quken to determine which tungsten heavy alloy composite is best for your application or refer to the tungsten heavy alloy properties chart below for more detailed information.

Product Standard Composition Density
Tensile strength
ASTM B777 AMS 7725E Tungsten % Binder
QK90NM Class 1 Type 1 Class 1 90 Ni/Cu 17.1 805 24
QK93NM Class 2 Type 1 Class 2 93 Ni/Cu 17.6 830 24
QK95NM Class 3 Type 1 Class 3 95 Ni/Cu 17.9 805 24
QK90 Class 1 Type 2 Class 1 90 Ni/Fe 17.1 875 27
QK92.5 Class 2 Type 2 Class 2 92.5 Ni/Fe 17.5 900 24
QK95 Class 3 Type 2 Class 3 95 Ni/Fe 18.1 910 24
QK97 Class 4 Type 2 Class 4 97 Ni/Fe 18.5 915 24