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France AFNOR NF TU42BT Steel tubes. Seamless tubes for ferritic non alloy and alloy steel heat exchangers. Dimensions. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: TU42BT / TU 42 BT
Category Grade Standard Region/Area Standard Content
Metals TU 42 BT NF A49-215 France Steel tubes. Seamless tubes for ferritic non alloy and alloy steel heat exchangers. Dimensions. Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the TU 42 BT

Element Min Max Similar
Si 0.1000 0.3500 -
S - 0.0400 -
P - 0.0400 -
Mn 0.3000 1.0500 -
Cu - 0.3000 -
C - 0.2200 -
Si - 0.4000 -
S - 0.0400 -
P - 0.0400 -
Mn - 1.1500 -
Cu - 0.3000 -
C - 0.2200 -

Mechanical Properties of steel grade TU 42 BT

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)
151 (≥) 215 (≥) 41 11 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 212

Physical Properties of steel grade TU 42 BT

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
14 - -     0.31 -  
937 854 - 41.3 331   -  
915 - 23 12.2   333 431

Heat Treatment of steel grade TU 42 BT

Heat treated : 1485°C - 1442°C

Technological Curves of steel grade TU 42 BT

Cross Reference Table (Equivalent Grade) of TU 42 BT

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