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SMO 254 Washers are top-notch, corrosion-resistant fasteners crafted for the toughest marine, chemical, and industrial settings. Made from SMO 254, a high-alloy austenitic stainless steel packed with molybdenum and nitrogen, these washers stand out for their remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. Suppliers like Aria Fasteners in Hamilton, New Zealand, guarantee precise dimensions, consistent thickness, and adherence to international quality standards. These washers excel at distributing loads, safeguarding surfaces, and boosting the performance of bolts, nuts, and stud bolts in demanding situations.
The composition of SMO 254 Washers includes iron, chromium, nickel, molybdenum, and nitrogen, which together provide outstanding mechanical strength and corrosion resistance. They boast high tensile strength, toughness, and stability under heavy loads. Thanks to their alloy makeup, they perform reliably in seawater, acidic, and chloride-rich environments, making them perfect for offshore, chemical, and high-temperature industrial applications where durability and corrosion resistance are a must.
| Grade | Ni | C | Mo | Mn | Si | F | Cu | S | P | Cr |
| SMO 254 | 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 |
| Element | Density | Melting Point | Yield Strength (0.2%Offset | Tensile Strength | Elongation |
| SMO 254 | 8.0 g/cm3 | 1320-1390 ℃ | 300 | 650 | 35 % |
Standard ASTM A182, A479 / ASME SA182, SA479
Dimensions DIN 125/127, ISO 7089/7090, ASME B18.22.1
Type Cold Forged, Hot Forged, Bar Stock Machined, Bar Stock Milling
Size M6-M64
Grade SMO 254 F44 UNS (S31254), DIN (1.4547)
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 washers are widely used in marine applications such as shipbuilding and offshore platforms where they are exposed to seawater. They are essential for chemical processing industries since they offer the best protection from aggressive chemicals and high temperatures. Moreover, these washers are used in heat exchangers, pulp and paper industries and other industries where high strength and resistance to detrimental conditions is needed for proper functioning.
You’ll find SMO 254 Washers in various settings, including chemical processing plants, desalination systems, offshore oil and gas facilities, power generation equipment, and marine structures. They work seamlessly with bolts, nuts, and stud bolts in flanges, pressure vessels, pipelines, and pumps that face corrosive chemicals or seawater. These washers ensure even load distribution, prevent loosening, and offer long-lasting durability. Additionally, SMO 254 Washers are utilized in food processing, pharmaceutical, and specialized industrial applications where high corrosion resistance, strength, and reliability are crucial for safe and enduring fastening solutions.
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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