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Hungary MSZ KL7 Steels for boilers and pressure vessels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: KL7 / KL 7
Category Grade Standard Region/Area Standard Content
Metals KL 7 MSZ 1741 Hungary Steels for boilers and pressure vessels

Chemical composition(mass fraction)(wt.%) of the KL 7

Element Min Max Similar

Mechanical Properties of steel grade KL 7

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)
746 (≥) 729 (≥) 21 41 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade KL 7

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
34 - -     0.44 -  
812 591 - 13.3 221   -  
869 - 23 42.2   423 341

Heat Treatment of steel grade KL 7

Heat treated : 1226°C - 1523°C

Technological Curves of steel grade KL 7

Cross Reference Table (Equivalent Grade) of KL 7

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