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AFNOR X7CrNiMoBNb16-6 Details

X7CrNiMoBNb16-6 Application:Creep resisting steels, nickel and cobalt alloys

Category Type Grade Designations
Grades Stainless Steels X7CrNiMoBNb16-6 France - AFNOR , NF EN 10028-7 - Flat products made of steels for pressure purposes - Part 7: Stainless steels
NF EN 10088-1 - Stainless steels - Part 1: List of stainless steels
NF EN 10216-5 (2004) - Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes
NF EN 10222-5 - Steel forgings for pressure purposes - Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels
NF EN 10269 - Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
NF EN 10302 (2002) - Creep resisting steels, nickel and cobalt alloys

Chemical composition(wt.%) of X7CrNiMoBNb16-6 grade: NF EN 10028-7

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.04 0.10
Si 0.30 0.60
Mn - 1.50
P - 0.045
S - 0.030
Cr 15.50 17.50
Ni 15.50 17.50
Mo 1.60 2.00
Nb+Ta 10XC% 1.20
B 0.050 0.10
Creep resisting steels, nickel and cobalt alloys

Mechanical properties of grade X7CrNiMoBNb16-6 NF EN 10028-7

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)
721 (≥) 647 (≥) 22 42 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical properties of grade X7CrNiMoBNb16-6 NF EN 10028-7

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
394 (≥) 911 (≥) 14 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 112
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
467 758 338

X7CrNiMoBNb16-6 - 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
X7CrNiMoBNb16-6 AFNOR France
Creep resisting steels, nickel and cobalt alloys

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