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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

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