W-Heavy metals

[WNiFe, WNiCu, WNiFeMo]

Tungsten heavy metals are high-density materials based on tungsten that are characterized by very high strength and good toughness. Additives such as nickel, iron, copper and molybdenum create alloys with specific properties - such as magnetic (NiFe) or non-magnetic (NiCu). They are used wherever compact dimensions, reliable shielding and high mechanical strength are required. At MOLYTUN, these materials are known as DensM® (NiFe-bonded) and DensM® P (NiCu-bonded). Detailed information on composition, nominal density and mechanical properties can be found in the grade overview and in the data sheets.

Grades & data sheets

Variety	Composition	Nominal density	Brief info	Available as	Data sheet
DensM®170	90% W + 10% NiFe	17.0 ± 0.15 g/cm³	ASTM B777 Class 1	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®170 P	90% W + 10% NiCu	17.0 ± 0.15 g/cm³	non-magnetic, ASTM B777 class 1	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®170 M	90% W + 10% NiFeMo	17.0 ± 0.2 g/cm³	Mechanically reinforced	Bars & rods (in stock), plates, finished parts according to drawing	On request
DensM®175	92.5% W + 7.5% NiFe	17.5 ± 0.2 g/cm³	ASTM B777 Class 2	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®175 P	92.5% W + 7.5% NiCu	17.0 ± 0.2 g/cm³	non-magnetic, ASTM B777 class 2	Bars & rods (in stock), plates, finished parts according to drawing	On request
DensM®180	95% W + 5% NiFe	18.0 ± 0.2 g/cm³	ASTM B777 Class 3	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®180 P	95% W + 5% NiCu	18.0 ± 0.2 g/cm³	non-magnetic, ASTM B777 class 3	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®185	97.5% W + 2.5% NiFe	18.5 ± 0.2 g/cm³	ASTM B777 Class 4	Bars & rods (in stock), plates, finished parts according to drawing	PDF
DensM®185 P	97.5% W + 2.5% NiFe	18.5 ± 0.3 g/cm³	non-magnetic	Bars & rods (in stock), plates, finished parts according to drawing	On request
DensM®190	98.5% W + 1.5% NiFe	18.8 ± 0.2 g/cm³	Very high density	Bars & rods (in stock), plates, finished parts according to drawing	On request

Tungsten heavy metals are high-performance materials based on tungsten that impress with their extreme density and outstanding mechanical properties. The combination of tungsten with additional elements such as nickel, iron, copper and molybdenum produces materials that are ideal for a wide range of industrial and military applications. MOLYTUN GmbH offers these tungsten heavy metals under the brand names DensM® and DensM® P, which are tailored to specific requirements. For detailed information on the material properties, available dimensions and tolerances, please refer to the following table or the corresponding material data sheets.

The key features are as follows: High density (17.0-18.8 g/cm³), magnetic (NiFe) / non-magnetic (NiCu), ASTM B777

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Density: 18.0 g/cm³

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Thermal conductivity: 90 W/m·K

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Electrical conductivity: ≈ 6-10 ×10^6 S/m (10-17 %IACS); NiCu non-magnetic S/m

Supply programme

Bars and rods (in stock), panels and finished parts according to customer drawings.

Properties

- Very high density (typically 17.0-18.8 g/cm³) with a compact design - High tensile strength (≈ 650-1000 N/mm²) and good elongation at break (≈ 1-25 %) - NiFe binder: slightly magnetic; NiCu binder: non-magnetic - Very good radiation shielding (X/gamma), good vibration and shock absorption - Good machinability compared to pure tungsten

Applications

- Balancing and inertia masses, precision weights - Radiation protection modules/inserts (medical, industrial) - Components with non-magnetic environment (NiCu variants) - Clamping/molding elements and highly stressed precision components - Aerospace, mechanical/equipment engineering (compact masses, damping)

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Specifications / standards

- ASTM B777-15 (Tungsten Base, High-Density Metal) - AMS-T-21014 (Tungsten Base Metal, High Density) - 2008 canceled

Questions? We’re happy to help.

Molytun supplies leading companies worldwide from industry & research

As a specialised partner for tungsten and molybdenum, we offer more than just metals: we deliver the highest quality, fast response times and solutions that match your requirements exactly.

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Global network

We supply customers worldwide and ensure reliable availability — even for large requirements.

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Made in Germany

Tungsten products manufactured in Germany: maximum precision, tested quality and production to the latest standards.

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Delivery from stock

Thanks to efficient logistics and large inventory, many products are available immediately — for fast and reliable supply.

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Customisation

Whether powders, semi-finished products or components — we deliver exactly to your technical specifications.