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Description

40Mn4 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: 40Mn4
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel 40Mn4
Ck50
1.1241
C55E
1.1203
Ck55
1.1209
C60E
1.1221
Ck60
1.1223

Chemical composition(mass fraction)(wt.%) of the 40Mn4

 

C
Si
Mn
P
S
Cr Ni
0.36-0.44  0.25-0.50  0.80-1.10  0.035  0.035     
Mo Al Cu Nb Ti V Ce
             
N Co Pb B Other    
             
             

Mechanical Properties of steel grade 40Mn4

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)
729 (≥) 575 (≥) 23 42 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 40Mn4

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
23 - -     0.14 -  
535 269 - 43.3 342   -  
173 - 32 41.2   223 132

Heat Treatment of steel grade 40Mn4

Heat treated : 1269°C - 1829°C

Technological Curves of steel grade 40Mn4


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