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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)
134 (≥) 554 (≥) 23 43 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

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
31 - -     0.14 -  
354 425 - 33.3 133   -  
255 - 42 42.2   343 414

Heat Treatment of steel grade Class 2 2B

Heat treated : 1679°C - 1784°C

Technological Curves of steel grade Class 2 2B

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

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