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Description

China GBT 55CrMnA China structural steel and alloy steel and 55CrMnA Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 55CrMnA
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 55CrMnA GBT China China structural steel and alloy steel
GB 70
GB 85
65Mn
55Si2Mn
55Si2MnB
55SiMnVB
60Si2Mn
60Si2MnA
60Si2CrA
60Si2CrVA

Chemical composition(mass fraction)(wt.%) of the 55CrMnA

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.52-0.60 0.17-0.37 0.65-0.95 0.03 0.03 0.65-0.95 Max 0.35

Mechanical Properties of steel grade 55CrMnA

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)
387 (≥) 467 (≥) 31 44 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade 55CrMnA

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
44 - -     0.24 -  
927 687 - 32.3 141   -  
493 - 31 41.2   411 441

Heat Treatment of steel grade 55CrMnA

Heat treated : 1951°C - 1743°C

Technological Curves of steel grade 55CrMnA

Cross Reference Table (Equivalent Grade) of 55CrMnA

Grade Standard Country Application
55CrMnA GBT China China structural steel and alloy steel

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