Special alloy strip
Super-austenitic, duplex and nickel alloys for corrosive environments and high temperatures.
When standard stainless steel is not enough
Acids, chlorides, seawater and high temperatures challenge even 316L. For these applications 3S supplies precision strip in special alloys: the super-austenitic AISI 904L and 254 SMO, Duplex 2205 and the nickel alloys Alloy 625 and Alloy 800, with the same processing as standard stainless steel strip.
Each alloy has its own field: 904L resists sulphuric and phosphoric acid; 254 SMO, with 6% molybdenum, resists pitting and crevice corrosion in seawater and brines; Duplex 2205 combines high mechanical strength with resistance to chloride stress corrosion cracking; Alloy 625 (nickel-chromium-molybdenum-niobium) withstands the most aggressive environments and high temperatures; Alloy 800 (800/800H/800HT, iron-nickel-chromium) resists oxidation and carburisation at high temperature. We supply annealed strip from 0.05 to 0.70 mm, in widths from 3 to 1250 mm, as coils, narrow strips and spools, with EN 10204 3.1 certificate and no minimum order.
Where it is used
- Spiral wound gaskets for chemical and petrochemical plants
- Flexible hoses and bellows for aggressive fluids
- Flue liners and chimney pipes for condensing and biomass boilers
- Structured packing and column internals
- Heat exchangers, desalination and offshore installations
- Furnaces, heating elements and high-temperature components
Recommended grades
Supply
| Parameter | Range | Notes |
|---|---|---|
| Typical grades | Super-austenitic AISI 904L and 254 SMO; Duplex 2205; nickel alloys Alloy 625 and Alloy 800 (800/800H/800HT). Annealed condition | Other grades on request |
| 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 | Calibrated mechanical properties |
| Formats | Strip • Narrow strips • Spools • Oscillate Wound Spools • Sheets | No minimum order |
| Spools | From 15 kg to 1500 kg | ID 50–400 mm • traverse or parallel winding |
Tolerances according to EN ISO 9445 or customer specification. EN 10204 3.1 certificate.
Frequently asked questions
Request a quoteWhich special alloy should I choose?
Do you also supply special alloys in small quantities?
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.