254 SMO Fasteners - Screws, Bolts & Nuts
A corrosion resistant 6Mo alloy for high chloride environments
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General and localized resistance to saltwater and chlorides
· Strength almost 2x's 300 series stainless
· 254 SMO Mechanical properties
· Strength and corrosion charts
· Availability and lead times
· 254 SMO fastener styles
· Datasheet for 254 SMO fasteners
254 SMO (1.4547) fasteners are made of a high-end stainless steel alloy that was developed for resistance to saltwater and chloride corrosion. This 6-Moly (6% Molybdenum) alloy has good localized corrosion resistance and 254 SMO provides much higher strength than other austenitic stainless steels. 254 SMO bolts are an ideal choice for high chloride environments including brackish water, seawater and other applications that demand heavy use of chlorines and chlorides. Compared to sister 6-Moly alloy AL6XN, 254 SMO fasteners offer slightly less high temperature stability corrosion resistance and strength.
Key Attributes• Good resistance to pitting & crevice corrosion• Good resistance to stress corrosion cracking• Good general corrosion resistance• Good strength nearly twice that of 300 series steels• High ductility and impact strength• Low carbon content for reduced risk of carbide precipitation during heating
Applications• Often used in industries that require bleach such as pulp & paper• Seawater protection for off-shore oil• Saltwater applications such as desalination• Chemical and food processing equipment• Flue-gas cleaning and desulfurization scrubbers
254 SMO Fastener Availability
AvailabilityExtreme Bolt & Fasteners offers 254 SMO screws, nuts and washers in many styles, as well as other threaded products. We have a minimum order quantity of appoximately 20 pieces for most fasteners. The typical lead time for 254 SMO fastener production is 3-4 weeks, depending on the complexity and quantity.
· Diameter sizes: Standard #00 – 4” in diameter / Metric M1.2 – M48
· Threads: UNC, UNF, UNJ, UNR, Rolled,and Cut
· Custom to print available.
· ASTM, ASME, MIL specifications, DFAR and Domestic available
Expediting OptionsExpediting options are also available upon request. When submitting a quote, please let us know your required lead time so that we can do our best to accommodate your specific needs.
254 SMO Fastener Styles
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• DIN 931• DIN 933• ISO 4014• ISO 4017• ISO 7370 | ||||
• DIN 439 / ISO 4035• DIN 934 / ISO 4032• DIN 985 / ISO 7040• DIN 986• DIN 980 / ISO 7042 / ISO 19513• DIN 6923 / ISO 4161 | ||||
• DIN 975• DIN 976 | ||||
• DIN 125 / ISO 7089 / ISO 7090• DIN 126 / ISO 7091• DIN 127 / ISO 7090• DIN 9021 / ISO 7093 |
254 SMO (1.4547) Chemistry & Specifications
254 SMO Specifications: UNS S31254, EN Number 1.4547

