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Description

SNB7 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: SNB7
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel SNB7
STK540
STK55
SCM415TK
SCM418TK
SCM420TK
SCM430TK
SCM435TK
SCM440TK
SCr420TK
SNB5

Chemical composition(mass fraction)(wt.%) of the SNB7

C
Si
Mn
P
S
Cr Ni
0.38-0.48 0.2-0.35 0.75-1.0 0.04 0.04 0.8-1.1  
Mo Al Cu Nb Ti V Ce
0.15-0.25            
N Co Pb B Other    
             
             

Mechanical Properties of steel grade SNB7

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)
895 (≥) 395 (≥) 22 11 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade SNB7

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 - -     0.12 -  
993 342 - 41.3 214   -  
442 - 44 31.2   424 214

Heat Treatment of steel grade SNB7

Heat treated : 1228°C - 1265°C

Technological Curves of steel grade SNB7

Cross Reference Table (Equivalent Grade) of SNB7

Grade Standard Country Application
SNB7-2 China China Taiwan Structural steel

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