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Class 2 1B

Japan JIS Class21B 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: Class21B / Class 2 1B
Category Grade Standard Region/Area Standard Content
Metals Class 2 1B 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 1B

Element Min Max Similar

Mechanical Properties of steel grade Class 2 1B

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)
254 (≥) 259 (≥) 33 21 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade Class 2 1B

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
24 - -     0.31 -  
121 537 - 14.3 212   -  
558 - 22 23.2   243 144

Heat Treatment of steel grade Class 2 1B

Heat treated : 1122°C - 1294°C

Technological Curves of steel grade Class 2 1B

Cross Reference Table (Equivalent Grade) of Class 2 1B

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