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Russia GOST 18HG Structural alloy steel bars. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18HG / 18HG
Category Grade Standard Region/Area Standard Content
Metals 18HG GOST 4543 Russia Structural alloy steel bars. Specifications

Chemical composition(mass fraction)(wt.%) of the 18HG

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mn 0.9000 1.2000 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.1500 0.2100 -

Mechanical Properties of steel grade 18HG

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)
599 (≥) 722 (≥) 12 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade 18HG

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
23 - -     0.13 -  
374 796 - 33.3 342   -  
963 - 22 22.2   111 321

Heat Treatment of steel grade 18HG

Heat treated : 1827°C - 1987°C

Technological Curves of steel grade 18HG

Cross Reference Table (Equivalent Grade) of 18HG

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