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Poland PN 45H Structural alloy steel -- Steel for heat treatment (quenching + tempering) and surface hardening-Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 45H / 45 H
Category Grade Standard Region/Area Standard Content
Metals 45 H PN H84030-04 Poland Structural alloy steel -- Steel for heat treatment (quenching + tempering) and surface hardening-Grades

Chemical composition(mass fraction)(wt.%) of the 45 H

Element Min Max Similar
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mn 0.5000 0.8000 -
Cu - 0.3000 -
Cr 0.8000 1.1000 -
C 0.4100 0.4900 -
Ti - 0.0500 -
W - 0.2000 -
V - 0.0500 -
Mo - 0.1000 -
Si 0.1700 0.3700 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mn 0.5000 0.8000 -
Cu - 0.3000 -
Cr 0.8000 1.1000 -
C 0.4100 0.4900 -

Mechanical Properties of steel grade 45 H

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)
951 (≥) 412 (≥) 12 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade 45 H

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
12 - -     0.23 -  
622 213 - 31.3 343   -  
611 - 31 11.2   114 234

Heat Treatment of steel grade 45 H

Heat treated : 1193°C - 1673°C

Technological Curves of steel grade 45 H

Cross Reference Table (Equivalent Grade) of 45 H

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