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ISO X6CrNiMoNb17-12 Details

X6CrNiMoNb17-12 Application:Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes

Category Type Grade Microstructure Designations
Grades Stainless Steels X6CrNiMoNb17-12 Austenite International - ISO , 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 9330-6 - Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes

Chemical composition(wt.%) of X6CrNiMoNb17-12 grade: ISO 9328-5

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 16.50 18.50
Mo 11.00 14.00
Ni 2.00 2.50
Nb 10×C% 1.00
Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes

Mechanical properties of grade X6CrNiMoNb17-12 ISO 9328-5

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)
346 (≥) 514 (≥) 32 22 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical properties of grade X6CrNiMoNb17-12 ISO 9328-5

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
952 (≥) 411 (≥) 22 23 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 214
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
383 682 281

X6CrNiMoNb17-12 - 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
X6CrNiMoNb17-12-2 B.S. UK
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
1.4580 B.S. UK
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
X6CrNiMoNb17-12-2 AFNOR France
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
1.4580 AFNOR France
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
X6CrNiMoNb17-12-2 ISO International
Stainless steels - Chemical composition
X6CrNiMoNb17-12 ISO International
Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes
X6CrNiMoNb17-12 ISO International
Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Longitudinally welded austenitic stainless steel tubes
X6CrNiMoNb17-12-2, 1.4580, AISI 316Cb, UNS S31640 EN European
used for fasteners, heat exchangers, coolers, tanks, pumps, pipelines and similar equipment of refineries, paper mills, food processing plants and chemical plants

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