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Description

B-4 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: B-4

Chemical composition(mass fraction)(wt.%) of the B-4

C
Si
Mn
P
S
Cr Ni
0.01 0.05 1.50 0.04 0.01 0.5-1.5 ...
Mo Al Cu Nb Ti V Ce
26.0-30.0 0.1-0.5 ≤0.5        
N Co Pb B Other    
  ≤2.50     Fe 1-6    
             

Mechanical Properties of steel grade B-4

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)
144 (≥) 844 (≥) 13 41 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade B-4

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
31 - -     0.33 -  
217 717 - 14.3 234   -  
568 - 31 22.2   244 234

Heat Treatment of steel grade B-4

Heat treated : 1157°C - 1415°C

Technological Curves of steel grade B-4

Cross Reference Table (Equivalent Grade) of B-4

Grade Standard Country Application
B-4 ASTM USA Steel Castings, Austenitic Manganese
B-4 ASTM USA Steel Castings, Austenitic Manganese

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