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France AFNOR NF 30CND8 Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 30CND8 / 30 CND 8
Category Grade Standard Region/Area Standard Content
Metals 30 CND 8 NF A35-556 France Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes

Chemical composition(mass fraction)(wt.%) of the 30 CND 8

Element Min Max Similar
Si 0.1000 0.4000 -
S - 0.0250 -
P - 0.0300 -
Ni 1.8000 2.2000 -
Mo 0.3000 0.5000 -
Mn 0.3000 0.6000 -
Cr 1.8000 2.2000 -
C 0.2600 0.3300 -

Mechanical Properties of steel grade 30 CND 8

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)
715 (≥) 633 (≥) 32 14 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 30 CND 8

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
43 - -     0.43 -  
333 993 - 33.3 124   -  
637 - 22 43.2   142 231

Heat Treatment of steel grade 30 CND 8

Heat treated : 1865°C - 1563°C

Technological Curves of steel grade 30 CND 8

Cross Reference Table (Equivalent Grade) of 30 CND 8

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