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ISO X9CrNi18-8 Details

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X9CrNi18-8 Application:Stainless steels for springs - Part 1: Wire

Category Type Grade Designations
Grades Stainless Steels X9CrNi18-8 International - ISO , ISO 6931-1 - Stainless steels for springs - Part 1: Wire

Chemical composition(wt.%) of X9CrNi18-8 grade: ISO 6931-1

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.12
Si - 1.50
Mn - 2.00
P - 0.045
S - 0.030
Cr 16.00 19.00
Mo - -
Ni 6.50 9.50
Stainless steels for springs - Part 1: Wire

Mechanical properties of grade X9CrNi18-8 ISO 6931-1

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)
226 (≥) 797 (≥) 32 31 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical properties of grade X9CrNi18-8 ISO 6931-1

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
537 (≥) 435 (≥) 24 42 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 123
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
279 756 866

X9CrNi18-8 - Form of Supply

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
X9CrNi18-8 ISO International
Stainless steels for springs - Part 1: Wire

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