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A579 Grade 75

America ASTM A579Grade75 超高强度合金钢锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A579Grade75 / A579 Grade 75
Category Grade Standard Region/Area Standard Content
Metals A579 Grade 75 ASTM A579/A579M America 超高强度合金钢锻件

Chemical composition(mass fraction)(wt.%) of the A579 Grade 75

Element Min Max Similar
C - 0.0300 -
Mn - 0.1000 -
P - 0.0100 -
S - 0.0100 -
Si - 0.1200 -
Ni 11.5000 12.5000 -
Cr 4.7500 5.2500 -
Mo 2.7500 3.2500 -
Ca - - 0.0600
Ti 0.1000 0.2500 -
Zr - - 0.0200
B - - 0.0030
Al 0.3500 0.5000 -

Mechanical Properties of steel grade A579 Grade 75

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)
974 (≥) 328 (≥) 44 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade A579 Grade 75

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
41 - -     0.31 -  
398 169 - 34.3 244   -  
147 - 43 41.2   111 333

Heat Treatment of steel grade A579 Grade 75

Heat treated : 1777°C - 1289°C

Technological Curves of steel grade A579 Grade 75

Cross Reference Table (Equivalent Grade) of A579 Grade 75

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