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At Hazlewood Fasteners in Canberra, we engineer washers that redefine performance in corrosive and high-stress environments. Our SMO 254 washers are crafted from a super austenitic stainless steel alloy designed for unparalleled resistance to pitting, crevice corrosion, and chloride-induced cracking. Built to deliver strength and precision under pressure, these washers ensure lasting protection for bolts and nuts in the harshest marine, chemical, and industrial settings. Hazlewood Fasteners’ SMO 254 washers go beyond basic function—they are advanced engineering components that secure assemblies with confidence, ensuring longevity, reliability, and stability where ordinary materials fall short.
SMO 254 washers are composed of approximately 20% chromium, 18% nickel, 6% molybdenum, and nitrogen, creating a super austenitic alloy with outstanding corrosion resistance and mechanical strength. This composition provides excellent resistance to chloride stress cracking and oxidation, even in seawater and chemical processing environments. SMO 254 washers maintain high tensile strength, ductility, and fatigue resistance under thermal cycling and mechanical load. Engineered for endurance, they deliver exceptional durability, load distribution, and corrosion protection, ensuring structural integrity in demanding industrial and marine applications.
| 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 desalination plants, offshore oil and gas equipment, marine structures, heat exchangers, and chemical processing facilities. Their superior resistance to chlorides, acids, and high temperatures makes them indispensable in aggressive and corrosive environments. These washers protect fasteners by distributing loads evenly, minimizing wear, and preventing loosening under vibration or stress. Hazlewood Fasteners’ SMO 254 washers ensure secure, long-term assembly performance in applications where corrosion, heat, and mechanical fatigue threaten reliability. Engineered for strength, stability, and protection, they are the ultimate choice for critical marine, industrial, and chemical installations.
SMO 254 washers are properly packed to make sure that they are not damaged in any way. Every washer is protected and packed separately in special, moisture proof containers to avoid any harm or contamination. Labeling should be clear so that it can easily be distinguished and sorted in the best manner possible. The packaging of our washers is very thorough to ensure that they are of the highest quality and are readily usable, which is in line with our company’s policy on quality and customer satisfaction.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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