Z55CMN20-08Az Stainless Steels to NF A 35-579

Z55CMN20-08Az - 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 Z55CMN20-08Az grade: to NF A 35-579

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.50 0.60
Si - 0.25
Mn 7.00 10.00
P - 0.040
S - 0.030
Cr 19.50 21.50
Ni 1.50 2.75
Mo - -
N 0.20 0.40

Z55CMN20-08Az - Detail

Valve steels and alloys for internal combustion engines

Mechanical properties of grade Z55CMN20-08Az 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)
212 (≥) 383 (≥) 33 41 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical properties of grade Z55CMN20-08Az 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
516 (≥) 336 (≥) 42 33 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 333
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
164 714 627

Equivalent Grade

Equivalent Products

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