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A320 B8PA Class 1

America ASTM A320B8PAClass1 低温用合金钢螺栓材料规格 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A320B8PAClass1 / A320 B8PA Class 1
Category Grade Standard Region/Area Standard Content
Metals A320 B8PA Class 1 ASTM A320/A320M America 低温用合金钢螺栓材料规格

Chemical composition(mass fraction)(wt.%) of the A320 B8PA Class 1

Element Min Max Similar
Si - 1.0000 -
S - 0.0300 -
P - 0.0450 -
Ni 10.5000 13.0000 -
Mn - 2.0000 -
Cr 17.0000 19.0000 -
C - 0.0800 -

Mechanical Properties of steel grade A320 B8PA Class 1

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)
931 (≥) 257 (≥) 12 13 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade A320 B8PA Class 1

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 - -     0.23 -  
622 672 - 42.3 334   -  
949 - 43 31.2   122 134

Heat Treatment of steel grade A320 B8PA Class 1

Heat treated : 1727°C - 1143°C

Technological Curves of steel grade A320 B8PA Class 1

Cross Reference Table (Equivalent Grade) of A320 B8PA Class 1

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