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Japan JIS STKM18A 机械结构用碳素钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STKM18A / STKM18A
Category Grade Standard Region/Area Standard Content
Metals STKM18A JIS G3445 Japan 机械结构用碳素钢管

Chemical composition(mass fraction)(wt.%) of the STKM18A

Element Min Max Similar

Mechanical Properties of steel grade STKM18A

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)
492 (≥) 474 (≥) 14 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade STKM18A

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
11 - -     0.13 -  
943 411 - 31.3 344   -  
866 - 23 13.2   444 132

Heat Treatment of steel grade STKM18A

Heat treated : 1782°C - 1264°C

Technological Curves of steel grade STKM18A

Cross Reference Table (Equivalent Grade) of STKM18A

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