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Russia GOST 12HN Structural alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 12HN / 12HN
Category Grade Standard Region/Area Standard Content
Metals 12HN GOST 4543 Russia Structural alloy steel bars. Specifications

Chemical composition(mass fraction)(wt.%) of the 12HN

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni 0.5000 0.8000 -
Mn 0.3000 0.6000 -
Cu - 0.3000 -
Cr 0.4000 0.7000 -
C 0.0900 0.1500 -
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni 0.5000 0.8000 -
Mn 0.3000 0.6000 -
Cu - 0.3000 -
Cr 0.4000 0.7000 -
C 0.0900 0.1500 -

Mechanical Properties of steel grade 12HN

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)
539 (≥) 631 (≥) 34 44 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade 12HN

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
34 - -     0.44 -  
265 495 - 22.3 224   -  
737 - 32 11.2   112 112

Heat Treatment of steel grade 12HN

Heat treated : 1887°C - 1922°C

Technological Curves of steel grade 12HN

Cross Reference Table (Equivalent Grade) of 12HN

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