Weston Stainless, Midland, UK, is a world-class supplier and producer of top–grade stainless steel products, providing industries globally with precision-made materials. Weston Stainless is particularly focused on SMO 254 Nuts, which is a high-alloy austenitic stainless steel grade distinguished by its outstanding corrosion resistance, particularly in chloride-containing environments. Produced in Grade SMO 254, the nuts possess excellent strength, toughness, and resistance to pitting and crevice corrosion. Coming in different forms and dimensions, SMO 254 Nuts contain a major proportion of chromium, nickel, molybdenum, and nitrogen, making them best suited for use in marine, chemical processing, offshore, and desalination applications.
SMO 254 Nuts contain about 19.5-20.5% Chromium, 17.5-18.5% Nickel, 6-6.5% Molybdenum, 0.18-0.22% Nitrogen, 1% Silicon, 1% Manganese, 0.03% Carbon, 0.03% Phosphorus, and 0.01% Sulfur, with Iron making up the balance. Mechanically, they exhibit tensile strength of about 650-850 MPa, yield strength of about 300 MPa, elongation of 35-40%, and a hardness of up to 100 HB. Their physical characteristics are a density of 8 g/cm³, thermal conductivity of 14.5 W/m·K, and electrical resistivity of 850 nΩ·m, which make them suitable for hostile environments that need high corrosion resistance and strength.
| Range | : | M10 TO M100 |
| Standards | : | ASTM / ASME SB 479 |
| Length | : | UPTO 5 METERS |
| Grade | : | UNS No. S31254 |
| Specification | : | IS, BS, ASTM |
| Type | : | Hot Forged and Cold Forged |
| SMO 254 | Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 17.5 – 18.5 | 0.02 max | 6 – 6.5 | 1 max | 0.8 max | – | 0.5 – 1 | 0.01 max | 0.03 max | 19.5 – 20.5 |
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.0 g/cm3 | 1320-1390 ℃ | 300 | 650 | 35 % |
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Corrosion-resistant product designed for extreme environments. SMO 254 Nuts are available in sizes from M6 to M36, ideal for marine, chemical processing, and offshore applications requiring superior resistance to pitting and crevice corrosion.
Engineered for joining threaded rods in harsh conditions. Available in sizes from M6 to M36, they provide strong connections for marine and chemical processing systems, ensuring durability and resistance to severe environments.
Featuring a nylon insert for secure fastening, SMO 254 Nylon Insert Nuts come in sizes from M6 to M24. They are perfect for applications in corrosive environments where vibration resistance and a stable connection are essential.
Enhanced load distribution with integrated flanges. Available in sizes from M6 to M24, they are suitable for heavy-duty applications in marine and chemical industries, providing robust support and corrosion resistance.
Engineered for high-stress applications, SMO 254 Heavy Hex Nuts are available in sizes from M6 to M36. They are ideal for use in demanding environments like offshore rigs and chemical processing facilities, offering exceptional strength and corrosion resistance.
A large surface area for effective torque application. Available in sizes from M6 to M24, they are ideal for secure fastening in tight spaces, particularly in marine and industrial settings where superior corrosion resistance is required.
SMO 254 Nuts are utilized extensively in applications that demand better corrosion resistance, high strength, and durability. In the maritime industry, they are utilized in ship construction, offshore platforms, and desalination plants owing to their ability to resist corrosion from seawater. The chemical processing industry uses them in reactors, heat exchangers, and piping systems dealing with acidic and chloride-enriched environments. They are also applied in the pulp and paper industry, power plants, and food processing machinery where high performance in adverse environments is critical. SMO 254 Nuts also occur in pharmaceutical and aerospace uses demanding reliability and long life.
SMO 254 Nuts are accompanied by test certificates like Mill Test Certificates (MTC) according to EN 10204 3.1 or 3.2, third-party inspection reports, and other quality assurance reports to guarantee compliance with industry standards. They are properly packaged using wooden boxes, cartons, or plastic wrapping to ensure they are not damaged in transit. Safe shipping options are provided for domestic and international markets, ensuring timely and safe delivery.
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