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X7CrNiAl17-7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of X7CrNiAl17-7

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B.S. X7CrNiAl17-7

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This page is mainly introduced the X7CrNiAl17-7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of X7CrNiAl17-7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Steel Garde:X7CrNiAl17-7
Type:Stainless Steels
Country:UK
Standard:B.S.

Standard Number:

ITEM	Standard Number	Descriptions
1	BS EN 10088-1	Stainless steels - Part 1: List of stainless steels
2	BS EN 10088-2	Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
3	BS EN 10088-3	Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
4	BS EN 10088-4	Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
5	BS EN 10088-5	Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes
6	BS EN 10151	Stainless steel strip for springs - Technical delivery conditions
7	BS EN 10270-3	Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Metallographic Structure:Precipitation-Hardening
Application:Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Relevant products:

1.4568 Spring Steel Wire

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
1.4568	B.S.	UK
X7CrNiAl17-7	AFNOR	France
1.4568	AFNOR	France
X7CrNiAl17-7	ISO	International

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.09
Si		0.70
Mn		1.00
P		0.04
S		0.015
Cr	16.00	18.00
Ni	6.50	7.80
Mo
Al	0.70	1.50

Mechanical Properties

Tensile strength	149～275	σb/MPa
Yield Strength	505	σ 0.2 ≥/MPa
Elongation	90	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	635～984	-
HRC	30	-

Physical Properties

Thermal expansion	63-27	e-6/K
Thermal conductivity	71-11	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8920-2407	째C
Density	7025-1726	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)
X7CrNiAl17-7 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