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AFNOR X1NiCrMoCuN25-20-7 Details

X1NiCrMoCuN25-20-7 Application:Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel

Category Type Grade Microstructure Designations
Grades Stainless Steels X1NiCrMoCuN25-20-7 Austenite 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 10088-2 - Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
NF EN 10088-3 - Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
NF EN 10088-4 - Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
NF EN 10088-5 - Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes
NF EN 10216-5 (2004) - Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes
NF EN 10217-7 - Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes
NF EN 10250-4 - Open die steel forgings for general engineering purposes - Part 4: Stainless steels
NF EN 10253-3 - Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements
NF EN 10253-4 - Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
NF EN 10272 - Stainless steel bars for pressure purposes
NF EN 10297-2 (2005) - Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel

Chemical composition(wt.%) of X1NiCrMoCuN25-20-7 grade: NF EN 10028-7

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.020
Si - 0.50
Mn - 1.00
P - 0.030
S - 0.010
Cr 19.00 21.00
Mo 6.00 7.00
Ni 24.00 26.00
N 0.15 0.25
Cu 0.50 1.50
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel

Mechanical properties of grade X1NiCrMoCuN25-20-7 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)
944 (≥) 275 (≥) 42 41 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical properties of grade X1NiCrMoCuN25-20-7 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
593 (≥) 227 (≥) 13 21 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 242
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
841 826 371

X1NiCrMoCuN25-20-7 - 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
X1NiCrMoCuN25-20-7 B.S. UK
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
1.4529 B.S. UK
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
X1NiCrMoCuN25-20-7 AFNOR France
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
1.4529 AFNOR France
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
X1NiCrMoCuN25-20-7, 1.4529, Alloy 926, UNS N08926 EN European
Steel is used mainly in the chemical, paper, cryogenic, aerospace, and power industries. The main end products are heat exchangers, chemical tanks, pumps, screws, aircraft components, bushings, shafts, water desalination and flue gas desulphurisation equi

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