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Japan JIS STKM19A 机械结构用碳素钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STKM19A / STKM19A
Category Grade Standard Region/Area Standard Content
Metals STKM19A JIS G3445 Japan 机械结构用碳素钢管

Chemical composition(mass fraction)(wt.%) of the STKM19A

Element Min Max Similar
Si - 0.5500 -
S - 0.0400 -
P - 0.0400 -
Other - - -
Mn - 1.5000 -
C - 0.2500 -

Mechanical Properties of steel grade STKM19A

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)
392 (≥) 331 (≥) 12 34 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade STKM19A

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
34 - -     0.43 -  
334 297 - 22.3 321   -  
368 - 32 21.2   111 424

Heat Treatment of steel grade STKM19A

Heat treated : 1187°C - 1294°C

Technological Curves of steel grade STKM19A

Cross Reference Table (Equivalent Grade) of STKM19A

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