Austenitic stainless steels
Austenitics are the largest stainless family: chromium and nickel in a face-centered cubic structure, non-magnetic, weldable and ductile from cryogenic temperatures up to about 800 °C.
Austenitic stainless steels: alloys supplied by Dustre
Forms: Bar, Plate, Pipe, Forging and flange, Fitting, Wire, Casting. Click an alloy to see standards by form, composition, properties and equivalents.
| Material | UNS | W.Nr. / EN | Forms |
|---|---|---|---|
| 304L stainless steelAustenitic stainless · Low-carbon Cr-Ni austenitic stainless steel | S30403 | 1.4307 | Bar, Plate, Pipe, Forging and flange, Fitting |
| 310S stainless steelAustenitic stainless · Heat-resisting 25Cr-20Ni austenitic stainless steel | S31008 | 1.4845 | Bar, Plate, Pipe, Forging and flange |
| 316Ti stainless steelAustenitic stainless · Titanium-stabilized Cr-Ni-Mo austenitic stainless steel | S31635 | 1.4571 | Bar, Plate, Pipe, Forging and flange |
| 317L stainless steelAustenitic stainless · Low-carbon Cr-Ni-Mo (3–4% Mo) austenitic stainless steel | S31703 | ≈ 1.4438 | Bar, Plate, Pipe, Forging and flange |
| 321 stainless steelAustenitic stainless · Titanium-stabilized Cr-Ni austenitic stainless steel | S32100 | 1.4541 | Bar, Plate, Pipe, Forging and flange |
| 347 stainless steelAustenitic stainless · Niobium-stabilized Cr-Ni austenitic stainless steel | S34700 | 1.4550 | Bar, Plate, Pipe, Forging and flange |
| F138 stainless steel (316LVM)Austenitic stainless · 18Cr-14Ni-2.5Mo austenitic stainless steel for surgical implants | S31673 | 1.4441 | Bar, Plate, Forging and flange, Wire |
| 316 / 316L stainlessAustenitic stainless · All standards by product form | S31600 | 1.4401, 1.4404… | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
| Nitronic 50 (XM-19)Austenitic stainless · High-nitrogen, high-strength austenitic stainless steel | S20910 | Sem equivalente EN direto | Bar, Plate, Pipe, Forging and flange |
| Nitronic 60Austenitic stainless · Galling- and wear-resistant austenitic stainless steel | S21800 | Sem equivalente EN direto | Bar, Plate, Forging and flange, Casting, Wire |
Did not find the alloy? See all materials or ask the technical team.
Which alloy resists each environment
Indicative summary from the corrosive media calculator, under typical conditions. For your medium, concentration and temperature, use the calculator.
| Material | Fresh water (200 ppm Cl⁻, 25 °C) | Seawater (20,000 ppm Cl⁻, 25 °C) | Sulfuric acid 20 %, 40 °C | Air at 800 °C |
|---|---|---|---|---|
| 304L stainless steel | very good | not recommended | not recommended | very good |
| 310S stainless steel | — | — | — | very good |
| 317L stainless steel | very good | not recommended | good | very good |
| 321 stainless steel | — | — | — | very good |
| 347 stainless steel | — | — | — | very good |
| 316 / 316L stainless | very good | limited | limited | very good |
About austenitic stainless steels
The classic composition is 18 % chromium and 8 % nickel (304). Adding molybdenum gives 316 and 317, for chlorides; titanium or niobium stabilize 321 and 347 against sensitization at high temperature; more chromium and nickel give 310, for furnaces; and more molybdenum, nickel and nitrogen form the super austenitics 904L and 254 SMO, for acids and seawater, which have their own page.
They do not harden by heat treatment, only by cold work. The standard treatment is solution annealing, which dissolves carbides and restores corrosion resistance after forging or welding.
See also
Frequently asked questions
Why is austenitic stainless not magnetic?
The austenitic (FCC) structure is not ferromagnetic. After heavy cold work part of it turns into martensite and the part may slightly attract a magnet; this does not indicate the wrong material.
When to use 321 or 347 instead of 316L?
In continuous service between 425 and 850 °C: titanium (321) and niobium (347) tie up the carbon and prevent chromium carbide precipitation at the grain boundaries.