254 SMO Stainless Steel Plate Manufacturer & Supplier
254 SMO is a 6% molybdenum super austenitic with nitrogen alloying, developed for natural seawater and strong chloride service. Its PREN above 42 puts pitting and crevice resistance on a par with super duplex while keeping austenitic toughness.
UNS: S31254 | Category: Super Austenitic & High Alloy Stainless
Size Range
Outer Diameter: Thickness 3 - 50 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 3 - 50 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|
| 0.020 max | 0.80 max | 1.00 max | 0.030 max | 0.010 max | 19.50-20.50 | 17.50-18.50 | 6.00-6.50 | 0.18-0.22 | 0.50-1.00 |
Mechanical Properties
- Yield Strength Rp0.2
- 300 MPa min
- Tensile Strength Rm
- 650-850 MPa
- Elongation A5
- 35% min
- Hardness
- 96 HRB max
Applicable Standards
- ASTM A240 / ASME SA240 (plate, sheet, strip)
- ASTM A480 (general requirements)
- EN 10088-2 (corrosion resisting sheet & plate)
- EN 10028-7 (pressure purposes)
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Seawater cooling systems
- Desalination plant equipment
- Offshore process vessels
- Bleach plant washers
- Flue gas desulphurisation ducting
Industries Served
- Water & Desalination
- Oil & Gas
- Marine & Shipbuilding
- Pulp & Paper
- Power & Energy
Equivalent Grades
- EN
- 1.4547 / X1CrNiMoCuN20-18-7
- UNS
- S31254
- Trade
- 254 SMO / Alloy 6Mo