SMO 254 is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media. Known as a "6-Moly" grade due to its 6% Molybdenum content, it offers elite resistance to pitting and crevice corrosion, far surpassing standard 316L and Duplex alloys.
With a high Pitting Resistance Equivalent Number (PREN) of at least 42, SMO 254 is specifically engineered for critical components in desalination plants and offshore oil platforms where standard stainless steels suffer rapid localized attack.
| Grade | Ni (Nickel) | Cr (Chromium) | Mo (Molybdenum) | Cu (Copper) | N (Nitrogen) | C (Carbon) | Mn (Manganese) | Si (Silicon) |
|---|---|---|---|---|---|---|---|---|
| SMO 254 (S31254) | 17.5 - 18.5 | 19.5 - 20.5 | 6.0 - 6.5 | 0.5 - 1.0 | 0.18 - 0.25 | 0.02 max | 1.0 max | 0.8 max |
| Grade | Tensile Strength (PSI) | Yield Strength (PSI) | Elongation (%) | Hardness (Brinell) | PREN Value | Density (lb/in³) |
|---|---|---|---|---|---|---|
| SMO 254 (Annealed) | 94,000 min | 44,000 min | 35% min | 223 max | ≥ 42.5 | 0.29 |
Seawater Service Grade
Ultra-high performance pipes designed for environments where standard duplex and 316L stainless fail. Essential for desalination brine heaters, salt-evaporation plants, and offshore oil and gas production systems.
High-Chloride Resilient
Superior buttweld and forged fittings engineered for maximum pitting and crevice corrosion resistance. These fittings maintain a PREN of 42+ throughout the heat-affected zone of welds.
Acid & Seawater Proof
Durable flat-rolled products used in the fabrication of Flue Gas Desulfurization (FGD) scrubbers, bleach washers in pulp and paper mills, and pharmaceutical reaction vessels.
Elite Sealing Performance
Heavy-duty forged flanges designed for leak-free performance in high-pressure chemical headers and offshore cooling intake systems. Provides total immunity to stress corrosion cracking.
Super Austenitic Shafting
Precision-machined bars for pump shafts and valve stems in aggressive chemical processing. Offers higher mechanical strength than standard austenitic steels with excellent impact toughness.
Dhanavir Steel is a premier stockholder and global supplier of high-performance Stainless Steel, Special Alloys and Nickel Alloys.
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Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.
Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.