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Description

B40 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B40
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel B40
4118H
4320H
4620H
4720H
4817H
4820H
5120H
8617H
8620H
9310H

Chemical composition(mass fraction)(wt.%) of the B40

C
Si
Mn
P
S
Cr Ni
0.52-0.6  0.4  0.6-0.9  0.025  0.015     
Mo Al Cu Nb Ti V Ce
  ≤0.05  ≤0.3     +    
N O2 Pb B Other    
  ≤0.002           
             

Mechanical Properties of steel grade B40

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)
818 (≥) 546 (≥) 23 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade B40

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
13 - -     0.33 -  
168 911 - 33.3 212   -  
991 - 23 22.2   423 311

Heat Treatment of steel grade B40

Heat treated : 1132°C - 1173°C

Technological Curves of steel grade B40

Cross Reference Table (Equivalent Grade) of B40

Grade Standard Country Application
51B40 Australia Structural steel

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