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Japan JIS STKM12C 机械结构用碳素钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STKM12C / STKM12C
Category Grade Standard Region/Area Standard Content
Metals STKM12C JIS G3445 Japan 机械结构用碳素钢管

Chemical composition(mass fraction)(wt.%) of the STKM12C

Element Min Max Similar
Si - 0.3500 -
S - 0.0400 -
P - 0.0400 -
Other - - -
Mn - 0.6000 -
C - 0.2000 -

Mechanical Properties of steel grade STKM12C

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)
274 (≥) 954 (≥) 33 11 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade STKM12C

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 - -     0.11 -  
746 247 - 24.3 334   -  
818 - 23 12.2   244 312

Heat Treatment of steel grade STKM12C

Heat treated : 1667°C - 1623°C

Technological Curves of steel grade STKM12C

Cross Reference Table (Equivalent Grade) of STKM12C

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