Khaled Stainless, located in Cairo, Egypt, is a reliable supplier of high-performance SMO 254 stainless steel fasteners, specifically designed to withstand the toughest service conditions. These super austenitic fasteners are crafted with meticulous threading, strict dimensional tolerances, and complete material traceability to comply with international industrial standards. Khaled Stainless provides bolts, nuts, washers, and threaded rods in SMO 254 for industries like chemical, marine, offshore, and desalination, where failure simply isn’t an option. With certified quality, consistent stock availability, and dependable delivery timelines, Khaled Stainless is here to meet the critical fastening needs for environments facing severe corrosion and high loads.
SMO 254 (UNS S31254) is a super austenitic stainless steel that contains about 19.5–20.5% chromium, 17.5–18.5% nickel, 6–6.5% molybdenum, and 0.18–0.22% nitrogen. This unique composition provides an incredibly high pitting resistance equivalent number (PREN > 42). Typical mechanical properties include a tensile strength ranging from 650–850 MPa, yield strength around 300–400 MPa, and elongation of 35–40%. The alloy boasts excellent toughness, a high load-bearing capacity, and outstanding resistance to stress corrosion cracking, especially in chloride-rich environments.
Standard : DIN, ASTM, BS and all International Standards
Size : 3 mm to 200 mm
Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size : M1 – M64 | #4 to 3″ | Custom Sizes
Length : M02 to M33
| Grade | C | Mn | Si | S | Cu | Ni | Cr | N | Mo | P |
| SMO 254 | 0.02 max | 1 max | 0.8 max | 0.01 max | 0.5 – 1 | 17.5 – 18.5 | 19.5 – 20.5 | 0.18 – 0.22 | 6 – 6.5 | 0.03 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| SMO 254 | 8.0 g/cm3 | 1320-1390°C | 650 | 300 | 35 % |
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SMO 254 nuts offer exceptional corrosion resistance in highly aggressive environments, including seawater. Available in sizes ranging from M6 to M30 and various dimensions, they ensure secure fastening with high strength and durability.
SMO 254 Stud Bolts provide superior corrosion resistance against chloride-induced stress. They are commonly available in lengths from 50 mm to 300 mm and diameters from M6 to M30, designed for high-pressure and high-temperature applications.
SMO 254 Bolts deliver excellent resistance to pitting and crevice corrosion. Standard sizes range from M6 to M30, with lengths from 20 mm to 200 mm. These bolts are ideal for demanding environments requiring high strength and durability.
SMO 254 threaded rods offer outstanding resistance to corrosion and high temperatures. Typically available in diameters from M6 to M30 and lengths up to 3 meters, they are used for various construction and industrial applications.
SMO 254 screws provide exceptional corrosion resistance and are used in marine and chemical environments. Sizes generally range from M3 to M20, with lengths from 10 mm to 150 mm, suitable for precise fastening needs.
SMO 254 washers ensure high corrosion resistance and are used to distribute load and prevent damage. They are available in sizes from M6 to M30, with thicknesses typically ranging from 1 mm to 5 mm, suitable for various applications.
All our products undergo quality standards tests such as material tests, performances tests, and corrosion resistance tests. They are realized by thorough third-party inspections so as to ascertain their credibility. We also guarantee on-time delivery as we ensure promptness in our operations so that customers will receive orders right on time according to their project schedules and quality standards.
SMO 254 fasteners are essential in bolting systems that face extreme corrosion, pressure, and temperature challenges. They are widely used in offshore oil and gas platforms, seawater piping, desalination plants, chemical processing equipment, heat exchangers, flue gas scrubbers, and coastal infrastructure. These fasteners outperform 316, 904L, and duplex grades in high-chloride and acidic environments, where standard stainless fasteners tend to fail quickly. Thanks to their remarkable corrosion resistance, mechanical stability, and long service life, SMO 254 fasteners are the go-to choice for critical joints that demand
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