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

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

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

Element Min Max Similar
W - 0.2000 -
V - 0.0500 -
Mo - 0.1000 -
Ti 0.0500 0.1200 -
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mn 0.8000 1.1000 -
Cu - 0.3000 -
Cr 1.0000 1.3000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 18 HGT

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)
195 (≥) 627 (≥) 11 24 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical Properties of steel grade 18 HGT

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 - -     0.44 -  
541 553 - 44.3 421   -  
268 - 43 23.2   322 214

Heat Treatment of steel grade 18 HGT

Heat treated : 1511°C - 1276°C

Technological Curves of steel grade 18 HGT

Cross Reference Table (Equivalent Grade) of 18 HGT

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