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Tungsten Base Alloys




Two times heavier than steel and more than 50% of lead, tungsten alloys with a copper or nickel matrix are essential for a wide variety of aerospace, military, radiation and nuclear shielding applications. They are produced by processes based on powder technology and subsequent sintering. 




Class 1 - SYNTES 1 in WNiFe and WNiCu with density 17g/cm³
Class 2 - SYNTES 2 in WNiFe and WNiCu with density 17,6g/cm³
Class 3 - SYNTES 3 in WNiFe and WNiCu with density 18 g/cm³
Class 4 - SYNTES 4 in WNiFe with density 18,5 g/cm³




Alloys manufactured with reference to ASTM B777 - 15 standards


1 Syntes 1 90 16,85 - 17,25 32
2 Syntes 2 92,5 17,15 - 17,85 33
3 Syntes 3 95 17,75 -18,35 34
4 Syntes 4 97 18,25 - 18,85 35

Tab.1 - Composizione - Densità - Durezza






1 Syntes 1 758 517 5
2 Syntes 2 758 517 5
3 Syntes 3 724 517 3
4 Syntes 4 689 517 2

Tab.2 - Mechanical physical properties



Many applications requiring high specific weight masses (such as weighing weights for a given system, inertial masses, high power penetrators, radiation screens, etc ...) use tungsten heavy alloys as they are the ideal compromise between bulk , cost and performance. Similar to features is uranium, but its potential hazard strongly limits its use.


Their most relevant property is given by the high density values of 17-19 g / cm³. Comparable densities are achieved only by precious metals such as platinum but obviously at an extremely high cost. Other advantages of these heavy alloys are their high level of elasticity, which gives them a high degree of workability far superior to the one of pure tungsten.

Heavy Alloys

Tungsten alloys can be machined to obtain both intermediate semi-finished  for further processing by the customer or as finished product in accordance with the drawing specifications. The use of alternative materials and production cycles and the absence of polluting metals such as lead within these alloys, gives them the purpose of diminishing or abandoning the use of hazardous materials and substances for man and the environment. Here below their main application :

· Balancing weights for the aircraft, helicopter rotors and missiles.

· High power penetrants for heavy armored vehicles

· Medical sector

· Containers of radioactive isotopes

· Radar components

· Automotive sector