AFNOR 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254

Grades | Stainless Steels | 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254

AFNOR 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254 ( Austenite )

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254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254 Application:Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel

Chemical composition(mass fraction)(wt.%) of the 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254
Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.020
Si - 0.70
Mn - 1.00
P - 0.030
S - 0.010
Cr 19.50 20.50
Mo 6.00 7.00
Ni 17.50 18.50
N 0.18 0.25
Cu 0.50 1.00

Mechanical properties of grade 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
843 (≥) 269 (≥) 21 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical properties of grade 254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
397 (≥) 391 (≥) 13 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2		 - - -
969 554 118 - - -

254SMO, X1CrNiMoCuN20-18-7, 1.4547, UNS S31254 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