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Japan JIS SUM12 易切削碳钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SUM12 / SUM 12
Category Grade Standard Region/Area Standard Content
Metals SUM 12 JIS G4804 Japan 易切削碳钢

Chemical composition(mass fraction)(wt.%) of the SUM 12

Element Min Max Similar
Si - - -
S 0.0800 0.1300 -
P - 0.0400 -
Mn 0.6000 0.9000 -
C 0.0800 0.1300 -

Mechanical Properties of steel grade SUM 12

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)
847 (≥) 631 (≥) 34 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade SUM 12

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
33 - -     0.11 -  
281 727 - 43.3 331   -  
854 - 33 21.2   311 323

Heat Treatment of steel grade SUM 12

Heat treated : 1563°C - 1449°C

Technological Curves of steel grade SUM 12

Cross Reference Table (Equivalent Grade) of SUM 12

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