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Germany DIN GG-25 Flake graphite cast iron (grey cast iron); properties and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GG-25 / GG-25
Category Grade Standard Region/Area Standard Content
Metals GG-25 DIN 1691 Germany Flake graphite cast iron (grey cast iron); properties

Chemical composition(mass fraction)(wt.%) of the GG-25

Element Min Max Similar

Mechanical Properties of steel grade GG-25

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 (≥) 817 (≥) 43 14 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade GG-25

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
21 - -     0.43 -  
916 264 - 13.3 323   -  
972 - 14 22.2   133 113

Heat Treatment of steel grade GG-25

Heat treated : 1342°C - 1422°C

Technological Curves of steel grade GG-25

Cross Reference Table (Equivalent Grade) of GG-25

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