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)
167 (≥) 756 (≥) 22 34 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 214

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
482 (≥) 199 (≥) 24 42 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 423
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
943 977 682

Equivalent Products

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