Specializing in High Quality Heavy Metal Alloys


Tungsten heavy alloys are ideal for high-density applications or for use in radiation shielding.Heavy metal tungsten alloys are 90% to 97% pure tungsten in a matrix of nickel and copper or nickel and iron. The addition of these alloying elements improves both the ductility and machinability of these alloys over non-alloyed tungsten.


We supply alloy as:

  • rod
  • bar
  • plate
  • Sheet
  • Finish machined parts and assemblies

As we produce material on site we can provide short lead times.

Custom Alloy Machined Parts

MGS specialise in a “one stop shop” approach supplying not just material but also finish machined parts to customer drawings and specifications. As suppliers to the majority of F1 teams for their ballast requirements we are used to dealing with short lead time requirements in one of the most time critical industries.

As suppliers to key aircraft programmes both for fixed wing and rotor craft we work to the most stringent aerospace requirements including NADCAP approved NDT and painting were required.

As suppliers into some of the most demanding and well known scientific projects including CERN, the JET fusion project as well as many others MGS are proud to play our part in supporting new developments in science and industry.

As suppliers into the developing world of nuclear medicine, security scanners and oil well logging, MGS have supplied many of the collimators, isotope containers and syringe shields and shielding used by the leading developers, both academic and commercial in these fields.

Designation WH9570C WH9075C WH8035C WH9375F WH9560F WH9766F
Nominal density g/cm3 18 17.2 15.3 17.6 18.1 18.5
AMS 7725 Class 3 Class 1 N/A Class 2 Class 3 Class 4
Type 1 Type 1 Type 2 Type 2 Type 2
Typical Applications
Radiation Shielding Anti- vibration Tooling Balance Weights Anti- vibration Tooling Anti- vibration Tooling Radiation Shielding
Balance Weights Radiation Shielding Dynamic Balance Weights Radiation Shielding Balance Weights
Balance Weights Ballast Balance Weights Ballast
Chemical Composition
W 95 90 80 93 95 97
Ni 3.5 7.5 7 5.25 3 2
Cu 1.5 2.5 13
Fe 1.75 2 1
Hardness 34 32 30 33 34 35
Max Hrc
Tensile Strength N/mm2 600 700 700 926 900 900
Elongation % 1 3 2 20 15 2
Modulus of Elasticity KN/mm2 350 350 250 350 350 350
% Relative Reduction before Rupture
(Test D10 x 10) 30 50 20 >50 >50 >50
Electrical Resistiv- ity CM 11 13 15 16 13 11
Thermal Conduc- tivity
Wm-1 K-1 135 94 80 100 105 108
Magnetic Properties Non Ferro Magnetic Non Ferro Magnetic Non Ferro Magnetic Weakly Ferro Magnetic Weakly Ferro Magnetic Weakly Ferro Magnetic