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Description

SN400A Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: SN400A
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel SN400A
SCM435TK
SCM440TK
SCr420TK
SNB5
SNB7
SNB16
SNB21-1~5
SNB22-1~5
SNB23-1~5
SNB24-1~5

Chemical composition(mass fraction)(wt.%) of the SN400A

C
Si
Mn
P
S
Cr Ni
0.24     0.05 0.05    
Mo Al Cu Nb Ti V Ce
             
N Co Pb B Other    
        Thickness 6~100/mm    
             

Mechanical Properties of steel grade SN400A

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)
744 (≥) 277 (≥) 24 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade SN400A

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
24 - -     0.32 -  
421 387 - 33.3 132   -  
727 - 14 12.2   412 311

Heat Treatment of steel grade SN400A

Heat treated : 1528°C - 1568°C

Technological Curves of steel grade SN400A

Cross Reference Table (Equivalent Grade) of SN400A

Grade Standard Country Application
SN400A China China Taiwan Structural steel

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