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France AFNOR NF D4p Dispersoid steels for hot forging. Semi-finished products and bars and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: D4p / D 4p
Category Grade Standard Region/Area Standard Content
Metals D 4p NF A33-111 France Dispersoid steels for hot forging. Semi-finished products and bars

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

Element Min Max Similar
V+Nb 0.0800 0.2000 -
V 0.0800 0.2000 -
Si 0.1000 0.4000 -
S - 0.0250 -
P - 0.0350 -
Mn 1.4000 1.9000 -
C 0.3000 0.4000 -

Mechanical Properties of steel grade D 4p

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)
543 (≥) 131 (≥) 13 43 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade D 4p

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
31 - -     0.22 -  
732 688 - 42.3 134   -  
298 - 14 42.2   221 112

Heat Treatment of steel grade D 4p

Heat treated : 1676°C - 1189°C

Technological Curves of steel grade D 4p

Cross Reference Table (Equivalent Grade) of D 4p

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