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A618 Grade Ⅱ

America ASTM A618GradeⅡ 热成形焊接及无缝高强度低合金结构管材规格 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A618GradeⅡ / A618 Grade Ⅱ
Category Grade Standard Region/Area Standard Content
Metals A618 Grade Ⅱ ASTM A618/A618M America 热成形焊接及无缝高强度低合金结构管材规格

Chemical composition(mass fraction)(wt.%) of the A618 Grade Ⅱ

Element Min Max Similar

Mechanical Properties of steel grade A618 Grade Ⅱ

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)
119 (≥) 651 (≥) 11 11 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade A618 Grade Ⅱ

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
11 - -     0.32 -  
182 982 - 12.3 111   -  
948 - 33 21.2   411 223

Heat Treatment of steel grade A618 Grade Ⅱ

Heat treated : 1754°C - 1243°C

Technological Curves of steel grade A618 Grade Ⅱ

Cross Reference Table (Equivalent Grade) of A618 Grade Ⅱ

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