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Steel on-5

Designation

Name The value
Designation GOST Cyrillic ВКЛ-5
Designation GOST Latin BKL-5
Transliteration VKL-5
The chemical elements WCoBe-5

Description

Steel on-5 is used: for the manufacture of casting parts of aviation, accurate methods of casting in ceramic form of constant models.

Note

Alloy structural steel case hardening steel.

Standards

Name Code Standards
Classification, nomenclature and general norms В20 OST 1 90005-91
Castings, steel В82 OST 1 90093-82

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al V Mo W Ce
OST 1 90093-82 0.14-0.2 ≤0.02 ≤0.02 0.6-1.2 1-1.8 1-1.5 0.8-1.2 The rest ≤0.3 ≤0.015 ≤0.08 0.05-0.2 1.6-2.1 0.7-1.1 0.05-0.1
Fe is the basis.

Mechanical characteristics

t отпуска, °C sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa HRC
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
- - 830-980 - - - 229-302 -
- - - - - - 341-445 37-43
Casting. Normalization at 1000-1050 °C, leave at 640-660 °C, air cooling + Tempering in oil 870-920 °C + Vacation
340-360 ≥880 ≥1180 ≥7 ≥20 ≥392 353-445 -
670-690 ≥735 ≥835 ≥10 ≥30 ≥490 229-302 -

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness
HRC Rockwell hardness (indenter diamond spheroconical)

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