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Class 2 2B

Japan JIS Class22B 平底铁轨和特殊轨道道岔和岔道非处理钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Class22B / Class 2 2B
Category Grade Standard Region/Area Standard Content
Metals Class 2 2B JIS E1101 Japan 平底铁轨和特殊轨道道岔和岔道非处理钢

Chemical composition(mass fraction)(wt.%) of the Class 2 2B

Element Min Max Similar

Mechanical Properties of steel grade Class 2 2B

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)
219 (≥) 972 (≥) 31 32 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade Class 2 2B

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
33 - -     0.33 -  
524 746 - 43.3 232   -  
391 - 33 32.2   231 221

Heat Treatment of steel grade Class 2 2B

Heat treated : 1532°C - 1579°C

Technological Curves of steel grade Class 2 2B

Cross Reference Table (Equivalent Grade) of Class 2 2B

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