TRIAMET® heavy metal
Tungsten-based heavy metal with a binder phase

TRIAMET® Heavy Metals – Buy Tungsten Heavy Alloy Directly from the Manufacturer

TRIAMET® is the tungsten heavy alloy of Wolfram Industrie: a tungsten-based composite material with a metallic binder phase, manufactured using powder metallurgical processes directly in Germany. All TRIAMET® heavy metals combine many of the extraordinary properties of tungsten with a precisely adjustable ductility – backed by over 100 years of experience in tungsten processing.

The binder phase varies depending on the TRIAMET® family and decisively determines the mechanical properties:

• TRIAMET® S: Tungsten, nickel and copper (paramagnetic, coercive force approx. 3–4 A/m)
• TRIAMET® G: Tungsten, nickel and iron (weakly ferromagnetic, coercive force 200–400 A/m)

Density and Mechanical Properties

The density of our TRIAMET® tungsten heavy alloys ranges from 13.9 to 18.9 g/cm³ – making TRIAMET® one of the densest industrially applicable materials available. The tungsten content varies by type between 71 and 98.2 wt.%. As the proportion of the binder phase increases, ductility and elongation at break rise; lower binder proportions result in higher densities and strengths. Tensile strength ranges from over 600 to up to 1,000 N/mm² depending on the type, with hardness values between 230 and 350 HV10.

If the residual magnetism of the G-family is undesirable in a given application, TRIAMET® of the „S” family is the recommended choice. Its nickel-copper binder is paramagnetic and exhibits only a negligible coercive force of approximately 3 A/m together with tungsten.

Economical Machining Despite High Density

Despite densities of up to 18.9 g/cm³, TRIAMET® tungsten heavy alloys can be machined efficiently and economically using conventional metal-cutting processes. Even complex components with the highest dimensional accuracy can be produced from suitable semi-finished products. The powder metallurgical manufacturing process enables material-saving production: green compacts already reach up to 80% of their final density, which is fully achieved through subsequent liquid-phase sintering at high temperatures.

Available supply forms include finished machined parts to drawing as well as semi-finished products in the form of rods, plates and blocks – including oversized lengths and special dimensions, round, octagonal or square, available at short notice worldwide. TRIAMET® tungsten heavy alloy meets the requirements of ASTM B777.

Damping, High-Temperature Strength and Thermal Expansion

The outstanding vibration damping properties of TRIAMET® tungsten heavy alloy are based on its high modulus of elasticity of up to 390 kN/mm² and its characteristic microstructure. Components of identical dimensions made from TRIAMET® exhibit approximately 40% less deflection compared to steel. In addition, TRIAMET® offers excellent high-temperature strength up to 1,000 °C and a low coefficient of thermal expansion – for the densest type G19, this is as low as 4.8 × 10⁻⁶/K (measured from 20 to 800 °C). This combination makes tungsten heavy alloy the ideal material for tooling in hot forming and joining technology.

Radiation Shielding with Tungsten Heavy Alloy

TRIAMET® heavy metals are used specifically for radiation shielding due to their high absorption capacity for high-energy electromagnetic radiation – particularly gamma and X-rays. With density values of up to 18.9 g/cm³, TRIAMET® enables compact shielding solutions that are simultaneously dimensionally stable, non-toxic and RoHS-compliant. Since tungsten requires no coating and is easy to clean and sterilize, tungsten heavy alloy is used in medical technology, radiation therapy and for isotope containers, among other applications.

TRIAMET® A – High-Performance Material for Light Metal Casting

Developed specifically for light metal casting, TRIAMET® A is a high-performance material that permanently resolves issues with dimensional stability, heat cracking and sticking. The TRIAMET® Mould family also offers tungsten alloys with particularly high corrosion resistance against aluminium, magnesium and copper alloys, combined with high thermal conductivity for rapid heat dissipation in casting tools.