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Japan DAIDO GF78 热间工具钢(锻造型) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GF78 / GF78
Category Grade Standard Region/Area Standard Content
Metals GF78 DAIDO HWTS Japan 热间工具钢(锻造型)

Chemical composition(mass fraction)(wt.%) of the GF78

Element Min Max Similar

Mechanical Properties of steel grade GF78

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)
719 (≥) 184 (≥) 14 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade GF78

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
23 - -     0.44 -  
864 364 - 32.3 441   -  
593 - 44 21.2   442 341

Heat Treatment of steel grade GF78

Heat treated : 1931°C - 1763°C

Technological Curves of steel grade GF78

Cross Reference Table (Equivalent Grade) of GF78

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