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Description

China CNS SN400B China Taiwan Structural steel and SN400B Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: SN400B
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel SN400B CNS China China Taiwan Structural steel
SMA490BW
SMA490CW
SMA490AP
SMA490BP
SMA490CP
SMA570W
SMA570P
SPA-H
SPA-C
SN400A

Chemical composition(mass fraction)(wt.%) of the SN400B

C(%) Si(%) Mn(%) P(%) S(%) Other(%)
0.20 0.35 0.60-1.40 0.03 0.015 CE Max 0.36

Mechanical Properties of steel grade SN400B

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)
469 (≥) 625 (≥) 22 43 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade SN400B

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 - -     0.42 -  
135 353 - 42.3 231   -  
238 - 13 23.2   323 234

Heat Treatment of steel grade SN400B

Heat treated : 1528°C - 1115°C

Technological Curves of steel grade SN400B

Cross Reference Table (Equivalent Grade) of SN400B

Grade Standard Country Application
SN400B CNS China China Taiwan Structural steel

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