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1.4870 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.4870

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AFNOR 1.4870

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This page is mainly introduced the 1.4870 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.4870,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:1.4870
Type:Stainless Steels
Country:France
Standard:AFNOR
Standard Number:

ITEM Standard Number Descriptions

1 NF EN 10090 Valve steels and alloys for internal combustion engines
Application:Valve steels and alloys for internal combustion engines

ITEM	Standard Number	Descriptions
1	NF EN 10090	Valve steels and alloys for internal combustion engines

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
X53CrMnNiNbN21-9	AFNOR	France
X53CrMnNiNbN21-9	ISO	International

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.48	0.58
Si		0.45
Mn	8.00	10.00
P		0.045
S		0.030
Cr	20.00	22.00
Ni	3.25	4.50
Mo
N	0.38	0.50
C+N	0.90

Mechanical Properties

Tensile strength	642～021	σb/MPa
Yield Strength	432	σ 0.2 ≥/MPa
Elongation	77	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	979～773	-
HRC	30	-

Physical Properties

Thermal expansion	86-81	e-6/K
Thermal conductivity	30-19	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	1592-8387	째C
Density	8574-2039	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)
1.4870 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