Alloy 254 SMO Stainless Steel UNS S31254 6MO Used In Marine Engineering
1. Desalination equipment
- Distillers
- Multiple-effect evaporators (MEDs)
- High-pressure pipes and heat exchangers in reverse osmosis (RO) systems
2. Offshore oil and gas platforms
- Offshore platform structural components
- Seawater cooling system pipes
- Splash zone components and fasteners
3. Shipbuilding
- Cooling water pipes for ships
- Propeller bearings
- Pumps, valves and heat exchangers
4. Marine energy development
- Submersible shells
- Submarine piping systems
- Connectors and brackets in offshore wind power equipment
5. Fisheries and aquaculture
- Structural components for offshore aquaculture equipment
- Water circulation and treatment system pipes
- Filtration systems in seawater pools
6. Seawater heat exchange equipment
- Seawater cooling towers
- Deck cooling system heat exchangers
UNS S31254 6MO Forms Available From Our Suppliers
- Pipes, tubes
- Plate, ASTM A240 UNS S31254 Sheet
- Round bar
- Fittings
- Flanges
- Fabricated pipe spools
Why Choose UNS S31254 6MO Instead of 316L?
1. For UNS S31254, its PREN value is as high as 42~45, which is much higher than ordinary austenitic stainless steel such as 316L (PREN≈23). The higher the PREN value, the stronger the pitting resistance.
2. The critical pitting temperature CPT of UNS S31254 is usually over 55°C, while the CPT of 316L is usually only 20~30°C.
3. The addition of up to 6% Mo and 0.2% N enhances its resistance to chloride pitting and crevice corrosion. UNS S31254 shows strong resistance to SCC in environments up to 50,000 ppm Cl⁻. 316L usually starts to show stress corrosion cracking in environments containing 15,000 ppm Cl⁻.
4. In 3.5% NaCl solution, the corrosion rate of UNS S31254 6MO is less than 0.01 mm/year, while 316L may reach more than 0.1 mm/year.
5. Mechanical properties of 254 SMO stainless steel
- Yield strength (YS): ≥ 310 MPa
- Tensile strength (UTS): ≥ 650 MPa
- Elongation: ≥ 35%
