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STY-R2 Class 1

Japan JIS STY-R2Class1 铁路机车车辆的碳钢轮 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STY-R2Class1 / STY-R2 Class 1
Category Grade Standard Region/Area Standard Content
Metals STY-R2 Class 1 JIS E5401 Japan 铁路机车车辆的碳钢轮

Chemical composition(mass fraction)(wt.%) of the STY-R2 Class 1

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0500 -
P - 0.0450 -
Mn 0.5000 0.9000 -
Cu - 0.3000 -
C 0.6000 0.7500 -
Si 0.1500 0.3500 -
S - 0.0500 -
P - 0.0450 -
Mn 0.5000 0.9000 -
Cu - 0.3000 -
C 0.6000 0.7500 -

Mechanical Properties of steel grade STY-R2 Class 1

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)
744 (≥) 276 (≥) 12 34 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade STY-R2 Class 1

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
14 - -     0.33 -  
115 291 - 12.3 241   -  
261 - 43 34.2   214 124

Heat Treatment of steel grade STY-R2 Class 1

Heat treated : 1929°C - 1337°C

Technological Curves of steel grade STY-R2 Class 1

Cross Reference Table (Equivalent Grade) of STY-R2 Class 1

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