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China GB 55Si2Mn 弹簧钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55Si2Mn / 55Si2Mn
Category Grade Standard Region/Area Standard Content
Metals 55Si2Mn GB/T 1222 China 弹簧钢

Chemical composition(mass fraction)(wt.%) of the 55Si2Mn

Element Min Max Similar

Mechanical Properties of steel grade 55Si2Mn

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)
981 (≥) 647 (≥) 21 12 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 55Si2Mn

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
43 - -     0.21 -  
782 868 - 22.3 424   -  
395 - 21 11.2   141 433

Heat Treatment of steel grade 55Si2Mn

Heat treated : 1188°C - 1335°C

Technological Curves of steel grade 55Si2Mn

Cross Reference Table (Equivalent Grade) of 55Si2Mn

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