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Japan DAIDO GFA 工具钢产品列表 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GFA / GFA
Category Grade Standard Region/Area Standard Content
Metals GFA DAIDO TSPL Japan 工具钢产品列表

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

Element Min Max Similar
V - - 0.1300
Mo - - 0.5000
Cr - - 1.2000
Ni - - 2.0000
Mn - - 1.0000
Si - - 0.2000
C - - 0.5000

Mechanical Properties of steel grade GFA

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)
186 (≥) 532 (≥) 43 32 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade GFA

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 - -     0.34 -  
741 477 - 43.3 214   -  
438 - 43 11.2   221 132

Heat Treatment of steel grade GFA

Heat treated : 1269°C - 1784°C

Technological Curves of steel grade GFA

Cross Reference Table (Equivalent Grade) of GFA

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