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Chemical composition % of the ladle analysis of grade ISO X9CrNi18-8

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％)
Max 0.12 Max 1.5 Max 2.0 Max 0.045 Max 0.030 16.0-19.0 6.5-9.5
ISO standard spring with stainless steel wire and steel strip
Mechanical properties of grade ISO X9CrNi18-8
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)
942 (≥) 831 (≥) 11 34 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 131
Physical properties of grade ISO X9CrNi18-8
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
233 (≥) 967 (≥) 13 43 24 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
977 294 481
ISO X9CrNi18-8 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
X9CrNi18-8
Stainless steels for springs - Part 1: Wire

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