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Description

France AFNOR NF A 35-579, NC20TA Specialsteel Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: NC20TA
Category Class Grade Standard Country Application
Steel GradesSpecialsteel NC20TA AFNOR France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the NC20TA

C Si Mn P S Cr Ni Mo Al Ti Fe Co Cu B
0.04 -0.10 ≤1.00 ≤1.00 ≤0.020 ≤0.015 18.00 -21.00 ≤remaining ≤ ≥ 1.00 -1.80 1.80 -2.70 ≤3.00 ≤2.00 ≤0.20 ≤0.0080

Mechanical Properties of steel grade NC20TA

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)
492 (≥) 737 (≥) 12 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade NC20TA

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
21 - -     0.23 -  
746 522 - 44.3 344   -  
194 - 31 21.2   421 332

Heat Treatment of steel grade NC20TA

Heat treated : 1465°C - 1535°C

Technological Curves of steel grade NC20TA

Cross Reference Table (Equivalent Grade) of NC20TA

Grade Standard Country Application
NC20TA

Relevant standard of NC20TA

NF A 35-579 Valve steels and alloys for internal combustion engines NF-A-35-579.pdf

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