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A372 Grade E Class 55

America ASTM A372GradeEClass55 压力容器薄壁碳素钢和合金钢锻件 and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals A372 Grade E Class 55 ASTM A372/A372M America 压力容器薄壁碳素钢和合金钢锻件

Chemical composition(mass fraction)(wt.%) of the A372 Grade E Class 55

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0250 -
P - 0.0250 -
Mo 0.1500 0.2500 -
Mn 0.4000 0.9000 -
Cr 0.8000 1.1500 -
C 0.2500 0.3500 -

Mechanical Properties of steel grade A372 Grade E Class 55

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)
251 (≥) 837 (≥) 42 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical Properties of steel grade A372 Grade E Class 55

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
41 - -     0.21 -  
399 887 - 21.3 444   -  
899 - 23 41.2   334 112

Heat Treatment of steel grade A372 Grade E Class 55

Heat treated : 1536°C - 1964°C

Technological Curves of steel grade A372 Grade E Class 55

Cross Reference Table (Equivalent Grade) of A372 Grade E Class 55

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