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Korea KS PLH28 Steel forgings and rolled or forged bars for pressure purposes-Technical delivery conditions-Part 4:Weldable fine grain steels with high proof strength and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: PLH28 / PLH 28
Category Grade Standard Region/Area Standard Content
Metals PLH 28 KS D ISO 9327-4 Korea Steel forgings and rolled or forged bars for pressure purposes-Technical delivery conditions-Part 4:Weldable fine grain steels with high proof strength

Chemical composition(mass fraction)(wt.%) of the PLH 28

Element Min Max Similar
C - 0.2000 -
Mn 1.0000 1.7000 -
P - 0.0250 -
S - 0.0200 -
Si 0.1000 0.6000 -
Ni - 1.0000 -
Cr - 0.3000 -
Mo - 0.1000 -
Cu - 0.3000 -
V - 0.2000 -
Ti - 0.2000 -
Al 0.0200 - -
N - 0.0200 -
Nb - 0.0500 -
Nb+Ti+V - 0.2200 -

Mechanical Properties of steel grade PLH 28

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)
172 (≥) 892 (≥) 23 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical Properties of steel grade PLH 28

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
43 - -     0.34 -  
683 623 - 11.3 113   -  
926 - 32 24.2   323 134

Heat Treatment of steel grade PLH 28

Heat treated : 1371°C - 1457°C

Technological Curves of steel grade PLH 28

Cross Reference Table (Equivalent Grade) of PLH 28

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