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Description

China CNS SNCM439 China Taiwan Structural steel and SNCM439 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: SNCM439
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel SNCM439 CNS China China Taiwan Structural steel
STKM18B
STKM18C
STKM19A
STKM19C
STKM20A
SNCM220
SNCM240
SNCM415
SNCM420
SNCM431

Chemical composition(mass fraction)(wt.%) of the SNCM439

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) Cu(%)
0.36-0.43 0.15-0.35 0.60-0.90 0.030 0.030 0.60-1.00 1.60-2.00 0.15-0.30 0.30

Mechanical Properties of steel grade SNCM439

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)
324 (≥) 232 (≥) 23 13 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade SNCM439

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 - -     0.31 -  
551 285 - 34.3 111   -  
762 - 34 43.2   242 122

Heat Treatment of steel grade SNCM439

Heat treated : 1589°C - 1797°C

Technological Curves of steel grade SNCM439

Cross Reference Table (Equivalent Grade) of SNCM439

Grade Standard Country Application
SNCM439 CNS China China Taiwan Structural steel

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