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Mitchell Stainless, a trusted manufacturer and supplier in Hamilton, New Zealand, offers premium SMO 254 stud bolts designed for high-performance industrial applications. These stud bolts are manufactured to provide exceptional strength, durability, and corrosion resistance in harsh chemical, marine, and high-temperature environments. SMO 254 is a super austenitic stainless steel known for its excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Mitchell Stainless ensures that each stud bolt meets stringent quality standards, delivering reliable and long-lasting fastening solutions for critical piping, flanges, and equipment assemblies in demanding industrial projects.
SMO 254 stud bolts are composed primarily of chromium (20–22%), nickel (18–20%), and molybdenum (6–7%), with small amounts of nitrogen, manganese, and iron as balance. This alloying provides outstanding resistance to pitting and crevice corrosion in chloride-rich environments, along with high tensile strength and excellent toughness. The combination of chromium, nickel, molybdenum, and nitrogen ensures durability in aggressive chemical and marine conditions while maintaining excellent mechanical integrity under high stress and elevated temperatures.
| SMO 254 Stud Bolt Specifications | ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 |
| SMO 254 Stud Bolt Dimensions | ASTM,DIN, BS,GB, IS and all International Standards |
| SMO 254 Stud Bolt Length | 3 mm to 200 mm |
| SMO 254 Stud Bolts Size | M02 to M33 | Custom Sizes |
| SMO 254 Stud Bolt Type | Stud Bolts, Heavy Stud bolt, Tie Bar, Tie Rod, Continuous Threaded Stud Bolts (Fully Threaded Studs without Chamfered Ends), Tap End Stud Bolts, Double End Stud Bolts, Double End Stud Bolts with Reduced Shank, Flange Stud Bolts (Fully Threaded Studs with Chamfered Ends), MS Stud Bolts, Metric Thread Stud Bolt, Rough Forged Stud Bolts, Stud Half Thread Bolts etc. |
| SMO 254 Stud Bolts Coating |
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| 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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UNS S31254 F44 hex stud bolts, made from high-performance 254 SMO alloy, offer exceptional resistance to corrosion and high strength. They are ideal for challenging industrial and marine environments.
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UNS S31254 stud bolts, crafted from high-performance 254 SMO stainless steel, offer superior corrosion resistance and strength. They are ideal for demanding industrial and marine applications where durability is crucial.
We ensure full transparency of our SMO 254 Stud Bolts with high-quality assurance. All the orders are provided with necessary documents, such as a commercial invoice, packing list, fumigation certificate, heat treatment chart, and an NABL-approved lab test report. We provide a Material Test Certificate per EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and a Third-Party Inspection Certificate. Our complete documentation is arranged to guarantee maximum client satisfaction.
SMO 254 stud bolts are widely used in chemical processing, petrochemical, offshore, and marine industries where corrosion resistance and mechanical strength are critical. They are ideal for fastening flanges, valves, pressure vessels, heat exchangers, and piping systems exposed to chloride-rich or acidic environments. These stud bolts are also suitable for high-temperature applications and maintenance or repair projects requiring durable and reliable fasteners. In New Zealand’s industrial sectors, SMO 254 stud bolts are valued for providing long-lasting performance, maintaining structural integrity, and ensuring safe and secure assemblies in aggressive chemical and marine environments.







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