Martensitic and ferritic stainless steels
Stainless families with little or no nickel: martensitics harden by quenching and tempering; ferritics do not harden, but resist oxidation and stress corrosion cracking well.
Martensitic and ferritic stainless steels: alloys supplied by Dustre
Forms: Bar, Plate, Forging and flange, Wire, Pipe, Casting. Click an alloy to see standards by form, composition, properties and equivalents.
| Material | UNS | W.Nr. / EN | Forms |
|---|---|---|---|
| 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 |
| 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 |
Did not find the alloy? See all materials or ask the technical team.
About martensitic and ferritic stainless steels
Martensitics (410, 420, 431, F6NM) have 11.5 to 18 % chromium and enough carbon to form martensite on quenching. They are the choice for pump shafts, valve stems, turbine discs and parts that need hardness and strength with moderate corrosion. F6NM (13Cr-4Ni), with low carbon, adds toughness and weldability.
Ferritics (430, 446) are magnetic, do not harden by heat treatment and cost less because they contain no nickel. They resist high-temperature oxidation and chloride stress corrosion cracking well, but have limited toughness in heavy sections.
See also
Frequently asked questions
Does 410 stainless rust?
It resists well in atmosphere, fresh water and steam, but not in chlorides or acids. If the medium contains chloride, prefer austenitic or duplex.
What hardness does 420 reach?
Quenched and tempered, it reaches 50 HRC or more, depending on the carbon content and the tempering temperature. See the data sheet of each alloy.
