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ISO X6CrNiNb18-11 Application:ISO standard austenitic stainless steel pressure seamless steel tube
Category Type Steel grade Standard Country
Grades Special Alloy ISO X6CrNiNb18-11 ISO ISO

Chemical composition % of the ladle analysis of grade ISO X6CrNiNb18-11

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％)
Max 0.08 Max 1.00 Max 2.00 Max 0.040 Max 0.030 17.0-19.0 9.00-13.0
ISO standard austenitic stainless steel pressure seamless steel tube
Mechanical properties of grade ISO X6CrNiNb18-11
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)
322 (≥) 561 (≥) 23 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 323
Physical properties of grade ISO X6CrNiNb18-11
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
827 (≥) 793 (≥) 13 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 422
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
757 845 426
ISO X6CrNiNb18-11 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
X6CrNiNb18-11 ISO ISO
Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Austenitic stainless steels

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