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A765 Grade IV

America ASTM A765GradeIV 具有强制性韧性要求的碳素钢及低合金钢压力容器部件锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A765GradeIV / A765 Grade IV
Category Grade Standard Region/Area Standard Content
Metals A765 Grade IV ASTM A765/A765M America 具有强制性韧性要求的碳素钢及低合金钢压力容器部件锻件

Chemical composition(mass fraction)(wt.%) of the A765 Grade IV

Element Min Max Similar
V - 0.0600 -
Si 0.1500 0.5000 -
S - 0.0200 -
P - 0.0200 -
Ni - 0.5000 -
Mo - 0.1000 -
Mn 1.0000 1.6000 -
Cu - 0.3500 -
Cr - 0.4000 -
C - 0.2000 -
Al - 0.0500 -

Mechanical Properties of steel grade A765 Grade IV

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)
876 (≥) 163 (≥) 44 21 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade A765 Grade IV

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
31 - -     0.13 -  
814 563 - 34.3 344   -  
515 - 21 34.2   442 412

Heat Treatment of steel grade A765 Grade IV

Heat treated : 1111°C - 1213°C

Technological Curves of steel grade A765 Grade IV

Cross Reference Table (Equivalent Grade) of A765 Grade IV

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