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ISO X7CrNiAl17-7 wire Application:ISO standard spring with stainless steel wire and steel strip
Category Type Steel grade Standard Country
Grades Special Alloy ISO X7CrNiAl17-7 wire ISO ISO

Chemical composition % of the ladle analysis of grade ISO X7CrNiAl17-7 wire

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Al(%)
Max 0.09 Max 1.0 Max 1.0 Max 0.045 Max 0.030 16.0-18.0 6.5-7.5 0.75-1.50
ISO standard spring with stainless steel wire and steel strip
Mechanical properties of grade ISO X7CrNiAl17-7 wire
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)
913 (≥) 832 (≥) 41 31 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 224
Physical properties of grade ISO X7CrNiAl17-7 wire
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
869 (≥) 123 (≥) 31 23 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 114
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
396 164 744
ISO X7CrNiAl17-7 wire Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
X7CrNiAl17-7 ISO ISO
Steel wire for mechanical springs - Part 3: Stainless spring steel wire
1.4568 ISO ISO
Steel wire for mechanical springs - Part 3: Stainless spring steel wire
X7CrNiAl17-7 ISO ISO
Steel wire for mechanical springs - Part 3: Stainless spring steel wire
1.4568 ISO ISO
Steel wire for mechanical springs - Part 3: Stainless spring steel wire
X7CrNiAl17-7 ISO ISO
Stainless steels - Chemical composition

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