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Germany DIN 1.7255 Steels for larger forgings for components in turbine and generator installations and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 1.7255 / 1.7255
Category Grade Standard Region/Area Standard Content
Metals 1.7255 SEW 555 Germany Steels for larger forgings for components in turbine and generator installations

Chemical composition(mass fraction)(wt.%) of the 1.7255

Element Min Max Similar

Mechanical Properties of steel grade 1.7255

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)
729 (≥) 185 (≥) 41 12 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade 1.7255

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 - -     0.21 -  
675 653 - 13.3 224   -  
156 - 33 42.2   442 323

Heat Treatment of steel grade 1.7255

Heat treated : 1637°C - 1786°C

Technological Curves of steel grade 1.7255

Cross Reference Table (Equivalent Grade) of 1.7255

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