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Poland PN 18HGM Structural alloy steel -- Carburizing steel -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18HGM / 18 HGM
Category Grade Standard Region/Area Standard Content
Metals 18 HGM PN H84030-02 Poland Structural alloy steel -- Carburizing steel -- Grades

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

Element Min Max Similar
P+S - 0.0600 -
Ti - 0.0500 -
W - 0.2000 -
V - 0.0500 -
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mo 0.2000 0.3000 -
Mn 0.9000 1.2000 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.1600 0.2300 -

Mechanical Properties of steel grade 18 HGM

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)
166 (≥) 946 (≥) 13 13 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade 18 HGM

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
21 - -     0.43 -  
886 825 - 34.3 341   -  
874 - 34 22.2   133 412

Heat Treatment of steel grade 18 HGM

Heat treated : 1815°C - 1828°C

Technological Curves of steel grade 18 HGM

Cross Reference Table (Equivalent Grade) of 18 HGM

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