Stainless steel
Stainless steel is a steel with at least 10.5 % chromium, which forms a passive oxide layer that protects the metal from corrosion. Here are all the stainless families Dustre supplies, with the data sheet of each alloy.
Stainless steel: alloys supplied by Dustre
Forms: Bar, Plate, Forging and flange, Casting, Wire, Pipe, Fitting. Click an alloy to see standards by form, composition, properties and equivalents.
| Material | UNS | W.Nr. / EN | Forms |
|---|---|---|---|
| 15-5PH – UNS S15500 (XM-12)Precipitation-hardening stainless · Martensitic precipitation-hardening stainless steel (Cr-Ni-Cu) | S15500 | 1.4545 | Bar, Plate, Forging and flange, Casting |
| 17-7PH – UNS S17700 (Type 631)Precipitation-hardening stainless · Semi-austenitic precipitation-hardening stainless steel (Cr-Ni-Al) | S17700 | 1.4568 | Bar, Plate, Forging and flange, Wire |
| 254 SMO / F44Super austenitic stainless · 6Mo super-austenitic stainless steel with nitrogen | S31254 | 1.4547 | Bar, Plate, Pipe, Forging and flange, Fitting |
| A-286 / Alloy 660Precipitation-hardening stainless · Precipitation-hardenable Fe-Ni-Cr superalloy | S66286 | 1.4980 | Bar, Plate, Forging and flange |
| 17-4PH stainless steel – UNS S17400 (ASTM A564 Type 630)Precipitation-hardening stainless · Martensitic precipitation-hardening stainless steel (Cr-Ni-Cu-Nb) | S17400 | 1.4542 | Bar, Plate, Forging and flange, Casting |
| 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 |
| 904L stainless steelSuper austenitic stainless · Low-carbon Ni-Cr-Mo-Cu super-austenitic stainless steel | N08904 | 1.4539 | 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 |
| AISI 403Martensitic stainless · Turbine-quality 12% Cr martensitic stainless steel | S40300 | ≈ 1.4006 | Bar, Plate, Forging and flange, Wire |
| AISI 416Martensitic stainless · Free-machining (resulfurized) martensitic stainless steel | S41600 | 1.4005 | Bar, Forging and flange, Wire |
| AISI 431Martensitic stainless · High-strength Cr-Ni martensitic stainless steel | S43100 | 1.4057 | Bar, Plate, Forging and flange, Wire |
| AISI 446Ferritic stainless · Oxidation-resistant 25% Cr ferritic stainless steel | S44600 | ≈ 1.4749 | Bar, Plate, Pipe, Forging and flange |
| Alloy 20 (Carpenter 20)Super austenitic stainless · Niobium-stabilized Fe-Ni-Cr-Mo-Cu alloy | N08020 | 2.4660 | Bar, Plate, Pipe, Forging and flange, Fitting |
| Alloy 28Super austenitic stainless · 27Cr-31Ni-3.5Mo-Cu super-austenitic stainless steel | N08028 | 1.4563 | Bar, Plate, Pipe |
| ASTM A182 F6NMMartensitic stainless · Forged 13Cr-4Ni-Mo soft martensitic stainless steel (wrought equivalent of… | S41500 | 1.4313 | Bar, Plate, Pipe, Forging and flange, Casting |
| 17-4PH round bar – ASTM A564 Type 630 / AMS 5643Precipitation-hardening stainless · Rolled or forged precipitation-hardening stainless bar, condition A or H1150 | S17400 | 1.4542 | Bar, Forging and flange |
| Duplex 2205 / F60 / S32205Duplex · All standards by product form | S32205 | 1.4462 X2CrNiMoN22-5-3 | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
| Duplex F51 / S31803Duplex · All standards by product form | S31803 | 1.4462 X2CrNiMoN22-5-3 | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
| Ferralium 255 / F61Super duplex · 25Cr-6Ni-3.5Mo-2Cu-N super duplex stainless steel | S32550 | 1.4507 | Bar, Plate, Pipe, Forging and flange |
| 316 / 316L stainlessAustenitic stainless · All standards by product form | S31600 | 1.4401, 1.4404… | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
| 329 stainless steelDuplex · First-generation 25Cr-4Ni-1.5Mo duplex stainless steel | S32900 | 1.4460 | Bar, Plate, Pipe, Forging and flange |
| 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 |
| Super duplex 2507 / F53 / S32750Super duplex · All standards by product form | S32750 | 1.4410 X2CrNiMoN25-7-4 | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
| Super duplex Zeron 100 / F55 / S32760Super duplex · All standards by product form | S32760 | 1.4501 X2CrNiMoCuWN25-7-4 | Bar, Plate, Pipe, Forging and flange, Fitting, Casting |
Did not find the alloy? See all materials or ask the technical team.
About stainless steel
Stainless steel is an alloy of iron, chromium and, in most families, nickel. Chromium reacts with the oxygen in the air and forms a thin, adherent chromium oxide film; if the surface is scratched, the film rebuilds itself. It is this passive layer, not the metal itself, that resists corrosion.
The families are divided by microstructure: austenitic (304, 316L, 321, 347, 904L), the most used, non-magnetic and easy to weld; ferritic and martensitic (410, 420, 430, 431), magnetic, with less nickel and more hardness; duplex and super duplex (2205, F51, F53, F55), with twice the strength and better behavior in chlorides; and precipitation-hardening grades (17-4PH, 15-5PH, 17-7PH), for high strength with good machinability.
The choice depends on the medium: chlorides call for molybdenum (316L, 317L, duplex); reducing acids call for more nickel (904L, Alloy 20); high temperature calls for 310, 321 or 347; implants require F138. The PREN calculator and the steel-by-corrosive-medium guide help compare.
See also
Frequently asked questions
What is the difference between 304 and 316L?
316L has 2 to 3 % molybdenum, which improves resistance to chlorides (seawater, brine, chemical processes). 304 is adequate for atmosphere, food and fresh water. In both, the "L" means low carbon, for welding without sensitization.
Is stainless steel magnetic?
It depends on the family. Austenitics (304, 316L) are not magnetic in the solution-annealed condition; ferritics, martensitics and duplex are. A magnet does not tell whether the material is stainless, only the family.
In which forms does Dustre supply stainless?
Round, square and flat bar, plate, pipe, open-die forgings (disc, ring, shaft, flange) and machined parts to drawing, with EN 10204 3.1 certificate.
