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SA-723 Grade 3 Class 2

America ASME SA-723Grade3Class2 压力部件用高强度合金钢锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals SA-723 Grade 3 Class 2 ASME SA-723/SA-723M America 压力部件用高强度合金钢锻件

Chemical composition(mass fraction)(wt.%) of the SA-723 Grade 3 Class 2

Element Min Max Similar
V - 0.2000 -
Si - 0.3500 -
S - 0.0150 -
P - 0.0150 -
Ni 3.3000 4.5000 -
Mo 0.4000 0.8000 -
Mn - 0.9000 -
Cr 0.8000 2.0000 -
C - 0.4000 -

Mechanical Properties of steel grade SA-723 Grade 3 Class 2

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)
271 (≥) 816 (≥) 44 22 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade SA-723 Grade 3 Class 2

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 -  
491 363 - 23.3 312   -  
845 - 42 23.2   313 431

Heat Treatment of steel grade SA-723 Grade 3 Class 2

Heat treated : 1821°C - 1992°C

Technological Curves of steel grade SA-723 Grade 3 Class 2

Cross Reference Table (Equivalent Grade) of SA-723 Grade 3 Class 2

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