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Russia GOST 20H Structural alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20H / 20H
Category Grade Standard Region/Area Standard Content
Metals 20H GOST 4543 Russia Structural alloy steel bars. Specifications

Chemical composition(mass fraction)(wt.%) of the 20H

Element Min Max Similar
Si 0.1700 0.3700 -
Mn 0.5000 0.8000 -
Cr 0.7000 1.0000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 20H

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
277 (≥) 432 (≥) 11 44 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade 20H

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
44 - -     0.42 -  
121 759 - 12.3 434   -  
644 - 42 11.2   133 211

Heat Treatment of steel grade 20H

Heat treated : 1788°C - 1461°C

Technological Curves of steel grade 20H

Cross Reference Table (Equivalent Grade) of 20H

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