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India IS ERW320 Carbon steel boiler tubes and superheater tubes. Part 4: Specific requirements for electric resistance welded and cold drawn electric resistance welded carbon steel boiler tubes and superheater tubes for design metal metal temperature not exceeding 454° and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: ERW320 / ERW 320
Category Grade Standard Region/Area Standard Content
Metals ERW 320 IS 1914-4 India Carbon steel boiler tubes and superheater tubes. Part 4: Specific requirements for electric resistance welded and cold drawn electric resistance welded carbon steel boiler tubes and superheater tubes for design metal metal temperature not exceeding 454°

Chemical composition(mass fraction)(wt.%) of the ERW 320

Element Min Max Similar

Mechanical Properties of steel grade ERW 320

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)
726 (≥) 458 (≥) 23 23 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade ERW 320

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 - -     0.44 -  
724 734 - 14.3 443   -  
783 - 44 31.2   421 241

Heat Treatment of steel grade ERW 320

Heat treated : 1284°C - 1453°C

Technological Curves of steel grade ERW 320

Cross Reference Table (Equivalent Grade) of ERW 320

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