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Korea KS STR38 Heat - resisting steel bars and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STR38 / STR 38
Category Grade Standard Region/Area Standard Content
Metals STR 38 KS D 3731 Korea Heat - resisting steel bars

Chemical composition(mass fraction)(wt.%) of the STR 38

Element Min Max Similar
B 0.0010 0.0100 -
Mo 1.8000 2.5000 -
Ni 10.0000 12.0000 -
Cr 19.0000 21.0000 -
P 0.1800 0.2500 -
S - 0.0300 -
Mn - 1.2000 -
Si - 1.0000 -
C 0.2500 0.3500 -
Si - 1.0000 -
S - 0.0300 -
P 0.1800 0.2500 -
Ni 10.0000 12.0000 -
Mo 1.8000 2.5000 -
Mn - 1.2000 -
Cr 19.0000 21.0000 -
C 0.2500 0.3500 -
B 0.0010 0.0100 -

Mechanical Properties of steel grade STR 38

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)
278 (≥) 443 (≥) 21 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade STR 38

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
22 - -     0.44 -  
193 245 - 12.3 213   -  
945 - 42 22.2   321 222

Heat Treatment of steel grade STR 38

Heat treated : 1595°C - 1559°C

Technological Curves of steel grade STR 38

Cross Reference Table (Equivalent Grade) of STR 38

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