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40 NCD 7-03

France AFNOR NF 40NCD7-03 Non alloy and alloy steel bolting for pressure equipement - Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 40NCD7-03 / 40 NCD 7-03
Category Grade Standard Region/Area Standard Content
Metals 40 NCD 7-03 NF E 29-043 France Non alloy and alloy steel bolting for pressure equipement - Specifications

Chemical composition(mass fraction)(wt.%) of the 40 NCD 7-03

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Ni 1.6500 2.0000 -
Mo 0.2000 0.3000 -
Mn 0.6000 0.8500 -
Fe - - -
Cr 0.7000 0.9000 -
C 0.3800 0.4300 -

Mechanical Properties of steel grade 40 NCD 7-03

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)
133 (≥) 457 (≥) 42 13 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade 40 NCD 7-03

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
24 - -     0.44 -  
427 965 - 33.3 144   -  
212 - 14 33.2   421 431

Heat Treatment of steel grade 40 NCD 7-03

Heat treated : 1697°C - 1978°C

Technological Curves of steel grade 40 NCD 7-03

Cross Reference Table (Equivalent Grade) of 40 NCD 7-03

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