Tungsten grades
We supply Wolfmet tungsten alloy in two ranges – magnetic (the HE range) and non-magnetic (the HA range). With densities up to 18.5gcm, these grades are the prime choice for adding balance weights, ballast or vibration damping mass where space is limited.
The high density of Wolfmet tungsten alloy also delivers effective radiation shielding particularly against X-ray and gamma radiation.
We also provide a specialist Wolfmet tungsten alloy grade (HM 490) for hot metal applications which offers good hot wear resistance.
All Wolfmet tungsten alloy grades are reasonably corrosion resistant in both acid and alkaline environments and can easily be plated or painted if necessary. They are easy to clean, non-toxic and non-radioactive.
Magnetic tungsten alloy
Manufactured with a binder of iron and nickel, our magnetic alloys have a tungsten content of 90-97% by weight. These are suitable for many situations where a high density material is required.
Non-magnetic tungsten alloys
For non-magnetic alloys, copper and nickel are the binding agents, with a tungsten content in the range of 90-95%. These non-ferromagnetic alloys are used in a variety of applications, including medical scanners.
Technical data
Wolfmet tungsten alloy conforms to the internationally recognised standard ASTM B777-15 and AMS 7725E the Aerospace Materials Specification. The non-magnetic Wolfmet grades have been proven to be non-magnetic through independent tests.
| Grade | HA 190 | HA 1925 | HA 195 | HE 390 | HE 3925 | HE 395 | HE 397 | |
|---|---|---|---|---|---|---|---|---|
| Aerospace industry standards | ||||||||
| ASTM B777-15 | Non-magnetic Class 1 | Non-magnetic Class 2 | Non-magnetic Class 3 | Magnetic Class 1 | Magnetic Class 2 | Magnetic Class 3 | Magnetic Class 4 | |
| AMS 7725E | Type 1 Class 1 | Type 1 Class 2 | Type 1 Class 3 | Type 2 Class 1 | Type 2 Class 2 | Type 2 Class 3 | Type 2 Class 4 | |
| Typical properties* | Units | |||||||
| Tungsten | Nominal % | 90 | 92.5 | 95 | 90 | 92.5 | 95 | 97 |
| Binder | Ni/Cu | Ni/Cu | Ni/Cu | Ni/Fe | Ni/Fe | Ni/Fe | Ni/Fe | |
| Nominal density | g/cm3 lb/in3 | 17.1 0.62 | 17.5 0.63 | 17.9 0.65 | 17.1 0.62 | 17.5 0.63 | 18.1 0.65 | 18.5 0.67 |
| 0.2% proof stress | MPa ksi | 675 100 | 650 95 | 680 100 | 645 95 | 645 95 | 660 95 | 660 95 |
| Tensile strength | MPa ksi | 805 116 | 830 120 | 805 116 | 875 126 | 900 130 | 910 131 | 915 132 |
| Elongation on 25mm (1") | % | 7 | 9 | 4 | 25 | 27 | 22 | 12 |
| Hardness | HRC | 24 | 24 | 24 | 27 | 24 | 24 | 25 |
*Properties may vary according to size and shape of part and production conditions. Figures shown are rounded and are typical for coupons (to fig.19 of ASTM E8) measured in accordance with ASTM B777-15; they are offered without warranty or guarantee. Values may be altered without notice and do not constitute a specification and should not be used for design purposes without reference to M&I Materials Ltd. It is for the customer to satisfy itself of the suitability of the products for its own particular purposes and environmental conditions.
Download Wolfmet Tungsten Alloys Technical data
Wolfmet tungsten alloys can be used in a variety of applications including radiation shielding, balancing, ballast and anti-vibration devices.
To find out more, click download or contact us today.