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Description

Korea KS D 3731 (2002), STR38 Specialsteel Heat - resisting steel bars and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STR38
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STR38 Austenite KS Korea Heat - resisting steel bars

Chemical composition(mass fraction)(wt.%) of the STR38

C Si Mn P S Cr Ni Mo N B
0.25 -0.35 ≤1.00 ≤1.20 0.18 -0.25 ≤0.030 19.00 -21.00 10.00 -12.00 1.80 -2.50 ≤ ≥ 0.001 -0.010

Mechanical Properties of steel grade STR38

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)
494 (≥) 158 (≥) 42 21 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade STR38

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 - -     0.22 -  
695 893 - 23.3 412   -  
747 - 43 34.2   142 413

Heat Treatment of steel grade STR38

Heat treated : 1628°C - 1383°C

Technological Curves of steel grade STR38

Relevant standard of STR38

D 3731 (2002) Heat - resisting steel bars D-3731-(2002).pdf

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