Description
AISI 321 (EN 1.4541, X6CrNiTi18-10) is a titanium-stabilised chromium-nickel austenitic stainless steel. Stabilisation prevents sensitisation and intergranular corrosion after welding or during service in the temperature range where unstabilised austenitic grades are vulnerable, roughly 450–850 °C. It also offers good mechanical and creep properties at elevated temperatures. It is used for exhaust manifolds and components, expansion joints, bellows, heat exchangers, furnace parts and aerospace and thermal components. 3S supplies AISI 321 precision strip in the annealed 2R/BA condition, as strip, narrow strips from 3 mm, spools and sheets in thicknesses from 0.05 to 0.70 mm.
Properties
- Titanium-stabilised, resistant to sensitisation
- Suitable for service at intermediate temperatures
- Good weldability
- Ideal for exhausts, bellows and heat exchangers
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 quoteWhich applications favour AISI 321?
Does AISI 321 resist chlorides like 316?
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.