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Description

20Cr4 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: 20Cr4
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel 20Cr4
A485 Grade3
A485 Grade4
52100
5195
K19526
1070M
5160
B20
20Cr3
B21

Chemical composition(mass fraction)(wt.%) of the 20Cr4

C
Si
Mn
P
S
Cr Ni
 0.17-0.23 0.4  0.6-0.9   0.025 0.015  0.9-1.2  
Mo Al Cu Nb Ti V Ce
   0.05 0.3       
N O2 Pb B Other    
  0.002           
             

Mechanical Properties of steel grade 20Cr4

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)
273 (≥) 757 (≥) 32 13 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade 20Cr4

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 - -     0.41 -  
362 275 - 32.3 421   -  
165 - 12 43.2   311 312

Heat Treatment of steel grade 20Cr4

Heat treated : 1321°C - 1743°C

Technological Curves of steel grade 20Cr4


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