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A320 B8MA Class 1

America ASTM A320B8MAClass1 低温用合金钢螺栓材料规格 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A320B8MAClass1 / A320 B8MA Class 1
Category Grade Standard Region/Area Standard Content
Metals A320 B8MA 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 B8MA Class 1

Element Min Max Similar

Mechanical Properties of steel grade A320 B8MA 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)
196 (≥) 787 (≥) 14 11 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade A320 B8MA 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
44 - -     0.14 -  
458 152 - 41.3 223   -  
227 - 43 21.2   244 141

Heat Treatment of steel grade A320 B8MA Class 1

Heat treated : 1956°C - 1883°C

Technological Curves of steel grade A320 B8MA Class 1

Cross Reference Table (Equivalent Grade) of A320 B8MA Class 1

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