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A542 Type E Class 4a

America ASTM A542TypeEClass4a 压力容器用经回火和淬火的铬钼、铬钼钒及铬钼钒钛硼合金钢板 and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals A542 Type E Class 4a ASTM A542/A542M America 压力容器用经回火和淬火的铬钼、铬钼钒及铬钼钒钛硼合金钢板

Chemical composition(mass fraction)(wt.%) of the A542 Type E Class 4a

Element Min Max Similar
V 0.1800 0.3300 -
Si - 0.1500 -
S - 0.0100 -
P - 0.0250 -
Other - - -
Ni - 0.2800 -
Mo 0.8500 1.1500 -
Mn 0.2500 0.6600 -
Cu - 0.2800 -
Cr 2.6300 3.3700 -
Cb 0.0100 0.0750 -
C 0.0800 0.1800 -

Mechanical Properties of steel grade A542 Type E Class 4a

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)
811 (≥) 216 (≥) 33 32 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical Properties of steel grade A542 Type E Class 4a

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
21 - -     0.23 -  
133 979 - 12.3 142   -  
432 - 12 22.2   442 313

Heat Treatment of steel grade A542 Type E Class 4a

Heat treated : 1714°C - 1344°C

Technological Curves of steel grade A542 Type E Class 4a

Cross Reference Table (Equivalent Grade) of A542 Type E Class 4a

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