Luois Metals, based in Houston, USA, is a reliable manufacturer and supplier of high-performance SMO 254 Bars and Rods, specifically crafted for extreme corrosion environments. SMO 254 (UNS S31254) is a super austenitic stainless steel that boasts a high molybdenum content (6%) and nitrogen, providing exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking caused by chlorides. Luois Metals offers SMO 254 rods and bars in a variety of sizes and finishes, adhering to international standards like ASTM A276, A479, and EN 10088. This alloy is perfect for applications in chemical processing, offshore platforms, desalination plants, and marine settings, where top-notch corrosion resistance is crucial.
SMO 254 Bars and Rods generally consist of 19.5–20.5% chromium, 17.5–18.5% nickel, 6–6.5% molybdenum, and a higher nitrogen content (~0.2%), which greatly boosts its corrosion resistance. The alloy provides a tensile strength ranging from 650 to 900 MPa, a yield strength of at least 300 MPa, and impressive elongation (over 35%), even in high-stress and corrosive environments. SMO 254 has an exceptional pitting resistance equivalent number (PREN > 42), making it ideal for challenging chloride-rich conditions. It also offers good weldability, formability, and impact toughness, both at room temperature and in sub-zero conditions, while outperforming 316L or Duplex grades in resisting localized corrosion.
Standards : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 1/2″ to 100″
Length : 100 mm to 6000 mm
Specifications : ASTM A276, A279, A479
Form : Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
Finish : Bright, Polish & Black
| Elements | Carbon | Chromium | Manganese | Molybdenum | Nickel | Nitrogen | Phosphorus | Silicon | Sulphur |
|---|---|---|---|---|---|---|---|---|---|
| SMO 254 UNS S31254 | 0.02 max | 19.5-20.5 | 1.0 max | 6.0-6.5 | 17.5-18.5 | 0.18-0.22 | 0.03 max | 0.8 max | 0.01 max |
| 0.2% Proof Stress (N/mm2 ) [ksi] minimum | 300 [43.5] |
| Tensile Strength (N/mm2) [ksi] minimum | 650 |
| Elongation (%) minimum | 35 |
| Hardness (HBN) | 270 max |
| Reduction of Cross Section Area (%) | 50 |
SMO 254 Bars and Rods are extensively utilized in seawater handling, chemical processing, and marine engineering because of their remarkable ability to withstand pitting, crevice corrosion, and stress corrosion cracking in chloride-laden environments. Typical applications include heat exchangers, pressure vessels, desalination systems, pulp and paper bleaching processes, saltwater cooling systems, and offshore platforms. In the oil and gas sector, SMO 254 is employed in valves, shafts, pump components, and fittings that come into contact with aggressive media.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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