254 SMO stainless steel strip
Super-austenitic with 6% molybdenum: resists chlorides, seawater and pitting.
Description
254 SMO (EN 1.4547, X1CrNiMoCuN20-18-7, UNS S31254) is a super-austenitic stainless steel with around 20% chromium, 18% nickel, 6% molybdenum and nitrogen. Its composition gives it far higher resistance to pitting and crevice corrosion than 316L and 904L, even in seawater, brines and hot chloride solutions, together with good mechanical strength. It is used in offshore and desalination plants, the chemical industry, pulp and paper and seawater heat exchangers. 3S supplies 254 SMO precision strip in the annealed 2R/BA condition, as strip, narrow strips and spools from 0.05 to 0.70 mm.
Properties
- Very high resistance to pitting and crevice corrosion
- Suitable for seawater and hot chlorides
- Higher mechanical strength than 316L
- Austenitic structure, good weldability
Applications for this grade
Supply
| Parameter | Range | Notes |
|---|---|---|
| Thickness | Annealed 0.05 – 0.70 mm | Other thicknesses on request |
| Width | 3 – 1250 mm | Slitting with sheared or deburred edges |
| Finishes | Annealed 2R / BA • Work‑hardened 2H | Calibrated mechanical properties |
| Formats | Strip • Narrow strips • Spools • Sheets | Sheets cut to size up to 1000 mm |
| Spools | From 15 kg to 1500 kg | ID 50–400 mm • traverse or parallel winding |
Tolerances according to EN ISO 9445 or customer specification. 3.1 certificates on request.
Frequently asked questions
Request a quoteWhat is the difference between 254 SMO and 904L?
Is 254 SMO available in thin gauges?
How can I get a quote?
Tell us the alloy, finish, thickness, width, edge and format (strip/narrow strip/spool) and we will send you a quick quotation.