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Japan JIS STKM18C 机械结构用碳素钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STKM18C / STKM18C
Category Grade Standard Region/Area Standard Content
Metals STKM18C JIS G3445 Japan 机械结构用碳素钢管

Chemical composition(mass fraction)(wt.%) of the STKM18C

Element Min Max Similar

Mechanical Properties of steel grade STKM18C

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)
921 (≥) 822 (≥) 22 33 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade STKM18C

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
41 - -     0.23 -  
191 623 - 34.3 141   -  
587 - 42 13.2   233 223

Heat Treatment of steel grade STKM18C

Heat treated : 1822°C - 1847°C

Technological Curves of steel grade STKM18C

Cross Reference Table (Equivalent Grade) of STKM18C

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