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International ISO TW4 Steel products for pressure purposes - Quality requirements - Part 3: Electric resistance and induction-welded tubes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: TW4 / TW 4
Category Grade Standard Region/Area Standard Content
Metals TW 4 ISO 2604-3 International Steel products for pressure purposes - Quality requirements - Part 3: Electric resistance and induction-welded tubes

Chemical composition(mass fraction)(wt.%) of the TW 4

Element Min Max Similar

Mechanical Properties of steel grade TW 4

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)
634 (≥) 164 (≥) 32 34 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade TW 4

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 - -     0.14 -  
614 393 - 14.3 314   -  
189 - 44 24.2   144 243

Heat Treatment of steel grade TW 4

Heat treated : 1956°C - 1719°C

Technological Curves of steel grade TW 4

Cross Reference Table (Equivalent Grade) of TW 4

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