X7CrNiAl17-7

X7CrNiAl17-7 Stainless Steels to NF EN 10088-1

X7CrNiAl17-7 - Specification & Application

  • NF EN 10088-1 - Stainless steels - Part 1: List of stainless steels
  • NF EN 10088-2 - Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
  • NF 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
  • NF EN 10088-4 - Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
  • NF 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
  • NF EN 10151 - Stainless steel strip for springs - Technical delivery conditions
  • NF EN 10270-3 - Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Chemical composition(wt.%) of X7CrNiAl17-7 grade: to NF EN 10088-1

Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.09
Si - 0.70
Mn - 1.00
P - 0.040
S - 0.015
Cr 16.00 18.00
Mo - -
Ni 6.50 7.80
Al 0.70 1.50

X7CrNiAl17-7 - Detail

Steel wire for mechanical springs - Part 3: Stainless spring steel wire

Mechanical properties of grade X7CrNiAl17-7 NF EN 10088-1

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)
782 (≥) 445 (≥) 42 12 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical properties of grade X7CrNiAl17-7 NF EN 10088-1

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
473 (≥) 821 (≥) 31 42 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 111
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
928 614 455

Equivalent Grade

1 ISO X7CrNiAl17-7 2 ISO X7CrNiAl17-7 wire 3 EN X7CrNiAl17-7 4 EN X7CrNiAl17-7 5 EN X7CrNiAl17-7 6 EN X7CrNiAl17-7 7 X7CrNiAl17-7 8 1.4568 9 X7CrNiAl17-7 10 1.4568 11 X7CrNiAl17-7

Equivalent Products

1 1.4568 Spring Steel Wire

Product shapes we supply:

We can customize the production of X7CrNiAl17-7 grade, contact us for the best solution.
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