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France AFNOR NF P920B Pressure vessels. Seamless steel gas vessels. Types of steels. Semi finished products and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: P920B / P 920 B
Category Grade Standard Region/Area Standard Content
Metals P 920 B NF A49-900 France Pressure vessels. Seamless steel gas vessels. Types of steels. Semi finished products

Chemical composition(mass fraction)(wt.%) of the P 920 B

Element Min Max Similar
V 0.1600 0.2600 -
Si 0.1500 0.3500 -
S - 0.0150 -
P - 0.0200 -
Ni 0.1500 0.2500 -
Mo 0.1500 0.3000 -
Mn 0.4500 0.6500 -
Cr 2.2500 2.7500 -
C 0.2800 0.3500 -

Mechanical Properties of steel grade P 920 B

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)
398 (≥) 579 (≥) 21 33 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 214

Physical Properties of steel grade P 920 B

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
44 - -     0.43 -  
467 876 - 23.3 424   -  
351 - 31 34.2   114 443

Heat Treatment of steel grade P 920 B

Heat treated : 1992°C - 1463°C

Technological Curves of steel grade P 920 B

Cross Reference Table (Equivalent Grade) of P 920 B

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