Description
AISI 309 (EN 1.4828, X15CrNiSi20-12) is a heat-resistant austenitic stainless steel. Its high chromium and nickel content, combined with a silicon addition, forms a protective, adherent oxide layer that allows service in air up to approximately 1000 °C. It retains good toughness and reasonable strength at high temperatures and copes well with repeated thermal cycling. Typical uses include furnace components, heat shields, heat-treatment fixtures, burners, gaskets and combustion equipment parts. 3S supplies AISI 309 precision strip in the annealed condition, as strip, narrow strips, spools and sheets from 0.05 to 0.70 mm.
Properties
- Oxidation resistance in air up to approx. 1000 °C
- Silicon addition for a more protective oxide layer
- Good toughness under thermal cycling
- Supplied annealed, ready for processing
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 quoteUp to what temperature can AISI 309 be used?
What is the difference between 309 (1.4828) and 309S (1.4833)?
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.