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China GB 20Mn2B 合金结构钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20Mn2B / 20Mn2B
Category Grade Standard Region/Area Standard Content
Metals 20Mn2B GB 3077 China 合金结构钢

Chemical composition(mass fraction)(wt.%) of the 20Mn2B

Element Min Max Similar

Mechanical Properties of steel grade 20Mn2B

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)
532 (≥) 968 (≥) 32 22 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 212

Physical Properties of steel grade 20Mn2B

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
21 - -     0.42 -  
743 832 - 11.3 224   -  
119 - 31 24.2   123 212

Heat Treatment of steel grade 20Mn2B

Heat treated : 1318°C - 1334°C

Technological Curves of steel grade 20Mn2B

Cross Reference Table (Equivalent Grade) of 20Mn2B

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