Harsh Metalloys stands out as a leading manufacturer and supplier of SMO 254 Nuts, proudly based in Mumbai, India. These high-performance fasteners are crafted from the austenitic stainless steel alloy SMO 254 (UNS S31254), which is renowned for its exceptional resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. Built to thrive in harsh and corrosive environments, SMO 254 Nuts deliver remarkable mechanical strength and durability. Harsh Metalloys provides precision-engineered nuts that adhere to global quality standards, making them perfect for critical applications in chemical processing, offshore platforms, desalination plants, marine industries, and heat exchangers, ensuring reliable and long-lasting fastening performance.
SMO 254 Nuts are constructed from the austenitic stainless steel alloy SMO 254, which includes around 20% chromium, 18% nickel, 6% molybdenum, and nitrogen to boost strength and corrosion resistance. The low carbon content guarantees excellent weldability and resistance to intergranular corrosion. These nuts boast a tensile strength of ≥ 650 MPa, yield strength of ≥ 300 MPa, and an elongation of ≥ 35%, making them ideal for high-pressure and high-temperature scenarios. Their unique composition ensures outstanding performance in chloride-rich and acidic environments, providing robust fastening with long-lasting resistance to degradation and corrosion fatigue.
| 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.
SMO 254 Coupling Nuts are 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.
SMO 254 Flange Hex Nuts offer 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.
SMO 254 Square Nuts feature 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 a go-to choice for tough environments, especially where high chloride levels can wreak havoc on regular stainless steels. You’ll find them in all sorts of applications, like seawater cooling systems, desalination plants, chemical tankers, offshore oil and gas rigs, the pulp and paper industry, and heat exchangers. They’re also commonly used in marine structures, flue gas cleaning systems, and pollution control equipment. Thanks to their impressive corrosion resistance and strength, SMO 254 Nuts are perfect for critical bolted connections in salty, chemical-laden environments. These nuts promise reliable, long-lasting performance while meeting international standards like ASTM, ASME, and DIN.
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