Tungsten VM
Tungsten B (VA)
Tungsten BM
Alloy VNZH 7-3
Alloy VNZh-90
Alloy VNZh-95
Alloy VNZh-97 (VNZh 97.5)
Alloy VNM 3-2
Tungsten VRN
Tungsten VT-10
Tungsten VT-15
Tungsten BT-30
Tungsten BT-50
Tungsten BT-7
Alloy SVI-1
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ВМ |
| Designation GOST Latin | BM |
| Transliteration | VM |
| The chemical elements | ВCu |
Description
Tungsten VM is used: for production of wire for the manufacture of light sources.
Note
Thoriated tungsten (tungsten with thorium).
Standards
| Name | Code | Standards |
|---|---|---|
| Wire of non-ferrous metals and their alloys | В74 | GOST 19671-91 |
Chemical composition
| Standard | W | Th |
|---|---|---|
| GOST 19671-91 | ≥99.7 | 0.17-0.25 |
W is the basis.
According to GOST 19671-91, the chemical composition is given for a tungsten alloy of the brand VM. The Thorium (Th) column indicates the mass fraction of thorium oxide in the alloy, which should be in the range 0.17-0.25. The total mass fraction of impurities should not be more than 0.050%.
According to GOST 19671-91, the chemical composition is given for a tungsten alloy of the brand VM. The Thorium (Th) column indicates the mass fraction of thorium oxide in the alloy, which should be in the range 0.17-0.25. The total mass fraction of impurities should not be more than 0.050%.
