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Z12CKNDWNb21-20-20

Description

France AFNOR NF A 35-579, Z12CKNDWNb21-20-20 Specialsteel Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: Z12CKNDWNb21-20-20
Category Class Grade Standard Country Application
Steel GradesSpecialsteel Z12CKNDWNb21-20-20 AFNOR France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the Z12CKNDWNb21-20-20

C Si Mn P S Cr Ni Mo Co W Nb N
0.08 -0.16 ≤1.00 1.00 -2.00 ≤0.040 ≤0.030 20.00 -22.50 19.00 -21.00 2.50 -3.50 18.50 -21.00 2.00 -3.00 0.75 -1.25 0.10 -0.20

Mechanical Properties of steel grade Z12CKNDWNb21-20-20

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)
494 (≥) 866 (≥) 12 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade Z12CKNDWNb21-20-20

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 - -     0.41 -  
252 884 - 12.3 233   -  
491 - 41 43.2   231 232

Heat Treatment of steel grade Z12CKNDWNb21-20-20

Heat treated : 1597°C - 1477°C

Technological Curves of steel grade Z12CKNDWNb21-20-20

Cross Reference Table (Equivalent Grade) of Z12CKNDWNb21-20-20

Grade Standard Country Application
Z12CKNDWNb21-20-20
Z12CKNDWNb21-20-20

Relevant standard of Z12CKNDWNb21-20-20

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

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