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SMO 254 Stud Bolts are high-strength, corrosion-resistant fasteners designed for the most demanding marine, chemical, and industrial applications. Manufactured from SMO 254, a high-alloy austenitic stainless steel enriched with molybdenum and nitrogen, these stud bolts provide exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. Suppliers in Hamilton, New Zealand, such as Aria Fasteners, ensure precise threading, uniform dimensions, and compliance with international quality standards. SMO 254 Stud Bolts are ideal for securing flanges, pipelines, pressure vessels, pumps, and industrial machinery exposed to aggressive or chloride-rich environments.
SMO 254 Stud Bolts are composed primarily of iron, chromium, nickel, molybdenum, and nitrogen, which enhance corrosion resistance, tensile strength, and durability. Mechanically, they offer high yield and tensile strength, excellent fatigue resistance, and dimensional stability under heavy loads and elevated temperatures. Their alloy composition ensures long-term performance in seawater, chemical processing, and high-temperature industrial applications, maintaining reliable joint integrity and mechanical stability.
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Ce | Fe | |
| SS 254 SMO | min. | – | 17.5 | – | 0.18 | – | – | – | 19.5 | 0.03 | Balance |
| max. | 0.02 | 18.5 | 0.08 | 0.22 | 0.01 | 1.00 | 0.03 | 20.5 | 0.08 | ||
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| SS 254 SMO | 650 | 35 | 300 | 50 | 270 |
Standard ASTM A193, A320 / ASME SA193, SA320
Dimensions DIN / ISO / ASME / ANSI / UNI / BS / BIS / SAE, etc.
Threads UNC, UNF, UNEF, UN, Coarse, Fine & BSW.
Type All Thread, Double End, Single End
Size Metric M1 to M152 & Imperial #0 to 8″ Bolt Diameter
Length Bolts upto 2500mm shank length.
Construction Hot Forged, Cold Forged, Bar Stock Machined
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
SMO 254 stud bolts are widely used in marine applications such as in ships and offshore platforms because of their excellent resistance to corrosion in marine environment. They are used in chemical processing industries because they are able to resist the attack of aggressive chemicals and high temperatures. Furthermore, these stud bolts are used in heat exchangers, pulp and paper industries and other industries where high strength and ability to withstand harsh conditions is required for a long lasting reliable service.
SMO 254 Stud Bolts are widely used in offshore oil and gas platforms, chemical processing plants, desalination systems, power generation equipment, and marine installations. They are ideal for securing flanges, pipelines, pumps, valves, and structural components exposed to seawater, acidic solutions, or chloride-rich environments. These stud bolts prevent loosening, maintain joint integrity, and provide long-term durability. SMO 254 Stud Bolts are also applied in pharmaceutical, food processing, and specialized industrial applications where high corrosion resistance, strength, and reliability are critical.
Aria Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hamilton, New Zealand, with over 8 years of experience serving global industries.
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