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Description

4118H Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: 4118H
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel 4118H
20NiCrMo2
B29
20NiCrMo7
20NiCrMo7
B30
18CrNiMo7-6
B31
18NiCrMo14-6
B32
16NiCrMo16-5

Chemical composition(mass fraction)(wt.%) of the 4118H

C
Si
Mn
P
S
Cr Ni
 0.17-0.23 0.15-0.35   0.6-1.0  0.025 0.015  0.3-0.7  
Mo Al Cu Nb Ti V Ce
 0.08-0.15 ≤ 0.05 ≤0.3     +    
N O2 Pb B Other    
  ≤0.002           
             

Mechanical Properties of steel grade 4118H

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)
462 (≥) 432 (≥) 11 11 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade 4118H

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
41 - -     0.32 -  
388 412 - 41.3 141   -  
967 - 31 44.2   414 444

Heat Treatment of steel grade 4118H

Heat treated : 1324°C - 1295°C

Technological Curves of steel grade 4118H


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