Tungsten (VA)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
В |
| Designation GOST Latin |
B |
| Transliteration |
V |
| The chemical elements |
В |
| Name |
The value |
| Designation GOST Cyrillic |
ВА |
| Designation GOST Latin |
BA |
| Transliteration |
VA |
| The chemical elements |
В |
Description
Tungsten is used: for the production by powder metallurgy drawn bars forged and used for the manufacture of electronic devices, screens, high-temperature furnaces; wire for light sources.
Standards
| Name |
Code |
Standards |
| Wire of non-ferrous metals and their alloys |
В74 |
GOST 19671-91 |
| Bars |
В55 |
TU 11-77 |
| Sheets and stripes |
В53 |
TU 48-19-106-91 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
TU 48-19-153-83 |
Chemical composition
| Standard |
Si |
Fe |
Al |
Mo |
Ca |
W |
| TU 11-77 |
- |
- |
- |
- |
- |
≥99.95 |
| GOST 19671-91 |
0.001-0.006 |
≤0.005 |
0.001-0.004 |
≤0.03 |
≤0.005 |
≥99.95 |
W is the basis.
According to TU 11-77, the content of tungsten is indicated including the content of thorium oxide. The sum of impurities and additives is ≤ 0.050%. The sum of impurities and additives includes the following elements: iron, calcium, molybdenum, potassium, silicon, aluminum.
According to GOST 19671-91 the chemical composition is given for tungsten grade VA.
Mechanical characteristics
| Section, mm |
σB, MPa |
| Wire in the delivery state according to GOST 19671-91. The cross-sectional diameter of the wire is specified in microns |
| 17.5-25.5 |
2671-4165 |
| 127-250 |
1871-3430 |
| 25.5-50 |
2156-4108 |
| 50-77 |
2058-3773 |
| 77-128 |
1871-3577 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
