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France AFNOR NF D5r Dispersoid steels for hot forging. Semi-finished products and bars and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: D5r / D 5r
Category Grade Standard Region/Area Standard Content
Metals D 5r NF A33-111 France Dispersoid steels for hot forging. Semi-finished products and bars

Chemical composition(mass fraction)(wt.%) of the D 5r

Element Min Max Similar
V+Nb 0.0800 0.2000 -
V 0.0800 0.2000 -
Si 0.1000 0.4000 -
S 0.0600 0.0950 -
P - 0.0350 -
Mn 1.2000 1.7000 -
C 0.3500 0.4500 -

Mechanical Properties of steel grade D 5r

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)
157 (≥) 442 (≥) 31 34 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade D 5r

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
23 - -     0.23 -  
559 224 - 43.3 132   -  
451 - 11 23.2   124 122

Heat Treatment of steel grade D 5r

Heat treated : 1178°C - 1253°C

Technological Curves of steel grade D 5r

Cross Reference Table (Equivalent Grade) of D 5r

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