X7CrNi18-9

X7CrNi18-9 Stainless Steels to ISO 15510 (2010)

X7CrNi18-9 - Specification & Application

  • ISO 15510 (2010) - Stainless steels -- Chemical composition
  • ISO 16143-3 (2005) - Stainless steels for general purposes -- Part 3: Wire
  • ISO 4955 (2005) - Heat-resistant steels
  • ISO 9327-5 - Steel forgings and rolled or forged bars for pressure purposes - Technical delivery conditions - Part 5: Stainless steels
  • ISO 9328-5 - Steel plates and strips for pressure purposes - Technical delivery conditions - Part 5: Weldable fine grain steels, thermomechanically rolled
  • ISO 9329-4 - Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Austenitic stainless steels
  • ISO/TS 15510 (2003) - Stainless steels - Chemical composition

Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes

Chemical composition(wt.%) of X7CrNi18-9 grade: to ISO 15510 (2010)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.04 0.07
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 17.00 19.00
Mo 8.00 11.00
Ni - -

X7CrNi18-9 - Detail

Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes

Mechanical properties of grade X7CrNi18-9 ISO 15510 (2010)

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)
986 (≥) 387 (≥) 41 41 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical properties of grade X7CrNi18-9 ISO 15510 (2010)

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
531 (≥) 452 (≥) 14 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 424
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
695 932 344

Equivalent Grade

1 X7CrNi18-9 2 ISO X7CrNi18-9 3 ISO X7CrNi18 9 4 X7CrNi18-9 5 X7CrNi18-9 6 X7CrNi18-9

Equivalent Products

Product shapes we supply:

We can customize the production of X7CrNi18-9 grade, contact us for the best solution.
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