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Z12CKNDWNb21-20-20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Z12CKNDWNb21-20-20

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AFNOR Z12CKNDWNb21-20-20

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This page is mainly introduced the Z12CKNDWNb21-20-20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Z12CKNDWNb21-20-20,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Valve steels and alloys for internal combustion engines

Steel Garde:Z12CKNDWNb21-20-20
Type:Stainless Steels
Country:France
Standard:AFNOR
Standard Number:

ITEM Standard Number Descriptions

1 NF A 35-579 Valve steels and alloys for internal combustion engines
Application:Valve steels and alloys for internal combustion engines

ITEM	Standard Number	Descriptions
1	NF A 35-579	Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.08	0.16
Si		1.00
Mn	1.00	2.00
P		0.040
S		0.030
Cr	20.00	22.50
Ni	19.00	21.00
Mo	2.50	3.50
Co	18.50	21.00
W	2.00	3.00
Nb	0.75	1.25
N	0.10	0.20

Mechanical Properties

Tensile strength	093～377	σb/MPa
Yield Strength	661	σ 0.2 ≥/MPa
Elongation	35	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	330～006	-
HRC	30	-

Physical Properties

Thermal expansion	13-01	e-6/K
Thermal conductivity	13-38	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5308-7811	째C
Density	0153-0159	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
Z12CKNDWNb21-20-20 Stainless Steels	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk