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France AFNOR NF NC20TA Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: NC20TA / NC 20 TA
Category Grade Standard Region/Area Standard Content
Metals NC 20 TA NF A35-579 France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the NC 20 TA

Element Min Max Similar

Mechanical Properties of steel grade NC 20 TA

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)
579 (≥) 798 (≥) 32 24 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade NC 20 TA

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
33 - -     0.32 -  
428 963 - 43.3 242   -  
971 - 44 42.2   322 433

Heat Treatment of steel grade NC 20 TA

Heat treated : 1322°C - 1287°C

Technological Curves of steel grade NC 20 TA

Cross Reference Table (Equivalent Grade) of NC 20 TA

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