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CEW Grade 620

India IS CEWGrade620 Boiler and supherheater tubes for marine and naval purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: CEWGrade620 / CEW Grade 620
Category Grade Standard Region/Area Standard Content
Metals CEW Grade 620 IS 2416 India Boiler and supherheater tubes for marine and naval purposes

Chemical composition(mass fraction)(wt.%) of the CEW Grade 620

Element Min Max Similar

Mechanical Properties of steel grade CEW Grade 620

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)
879 (≥) 492 (≥) 21 44 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade CEW Grade 620

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
23 - -     0.22 -  
191 143 - 42.3 321   -  
439 - 33 23.2   144 443

Heat Treatment of steel grade CEW Grade 620

Heat treated : 1869°C - 1729°C

Technological Curves of steel grade CEW Grade 620

Cross Reference Table (Equivalent Grade) of CEW Grade 620

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