NC20TA Stainless Steels to NF A 35-579

NC20TA - Specification & Application

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

Valve steels and alloys for internal combustion engines

Chemical composition(wt.%) of NC20TA grade: to NF A 35-579

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.04 0.10
Si - 1.00
Mn - 1.00
P - 0.020
S - 0.015
Cr 18.00 21.00
Ni - remaining
Mo - -
Al 1.00 1.80
Ti 1.80 2.70
Fe - 3.00
Co - 2.00
Cu - 0.20
B - 0.0080

NC20TA - Detail

Valve steels and alloys for internal combustion engines

Mechanical properties of grade NC20TA NF A 35-579

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
692 (≥) 176 (≥) 24 44 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical properties of grade NC20TA NF A 35-579

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
968 (≥) 649 (≥) 12 42 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 442
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
519 651 165

Equivalent Grade

Equivalent Products

We can customize the production of NC20TA grade, contact us for the best solution.
sales@specificsteel.com