​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Outokumpu Core range

C​​orrosive environments​

  • ​​Stainless steels for corrosive environments (PRE 17 to 22)
  • Austenitics are highly formable and weldable and are suitable for everything from cutlery to storage tanks
  • Contains the all-purpose Core 304/4301 and Core 304L/4307, as well as seve​​ral alternatives, including low-nickel and nickel-free products​
  • Ferritic stainless steels are nickel free, have good fo​​​​​rmability, and are used in architectural applications and appliances​

Core 304/4301 Core 301LN/4318
Core 304L/4307 Core 301/4310
Core 304LN/4311 Core 201LN/4372
Core 304L/4306 Core 441/4509
Core 305/4303 Core 4622
Core 321/4541 Core 434/4113
Core 347/4550
Typical applications
Household appliances and consumer goods
Kitchen utensils, tableware, cutlery, pots, and pans
Sinks and countertops
Indoor and outdoor cladding, handrails, and window frames
Rebar in concrete
Automotive applications
Storage tanks

​Compare ​product performance​

​Product p​roperties​​

 Corrosion resistance

​​In gen​eral, the Outokumpu Core range has good corrosion resistance in solutions of many halogen­free organic and inorganic compounds over a wide temperature and concentration range. They can withstand many organic and sufficiently diluted mineral acids depending on the temperature of the solution.

In chloride containing solutions pitting and crevice corrosion is possible depending on various parameters like chloride concentration, temperature, pH value, redox potential, crevice geometry and others.

The best material performance is reached usually with the help of adequate design, correct post-weld treatment and regular cleaning during use (if applicable).

For more information

Check Stainless Steel Finder to find corrosion information by products in the Outokumpu Core range​

Check the online corrosion tables and search by chemical name, formula corrosion rates or alphabetically for stainless steel products

Find an Outokumpu sales office near you to get the printed version of the Outokumpu Corrosion Handbook​​​​​​​​



Outokumpu Core range products can be readily formed and fabricated by a full range of cold forming operations. Austenitics offer better elongation, while ferritics have excellent deep drawability.


​Conventional welding methods like MMA, MIG, MAG, TIG, SAW, LBW or RSW, except gas welding are applicable. With austenitic steels, larger deformation and higher shrinkage stresses may result from welding. With ferritics, heat input should be minimized to reduce the grain growth in the affected zone. Cleaning the weld seam has a significant importance for corrosion resistance. ​​

​​​More fabrication information is available in the Outokumpu Welding Handbook, available from our local sales offices​​​

 Forms & dimensions

​​The available forms for Outokumpu Core​ range products can include:
To see the forms available for a specific product or to get information about dimensions, check Stainless Steel Finder​​​​​​​​​

 Standards and approvals


​Flat products

  • ​​EN ISO 18286 Hot-rolled stainless steel plates – Tolerances on dimensions and shape
  • EN 10051 Hot-rolled steel strip. Tolerances
  • EN 10088-1 Stainless steels – list of stainless steels
  • ISO 15510 Stainless steels – chemical composition
  • EN ISO 9445 Cold-rolled stainless narrow strip, wide strip, plate/sheet and cut lengths. Tolerances
  • ASTM A 480 General requirements for flat-rolled stainless and heat resisting steel
  • ASTM A 959 Harmonized standard grade compositions for wrought stainless steels
  • ASME IID Materials – Physical properties tables ​​


​Flat and long products

  • ​​EN 10028-7 Flat products for pressure purposes – Stainless steels
  • EN 10088-2 Stainless steels – sheet/plate and strip for general purposes
  • EN 10088-3 Stainless steels – Corrosion resisting semi-finished products/bars/rods/wire/sections for general and construction purposes
  • ISO 15510 Stainless steels – chemical composition
  • EN 10088-4 Technical delivery conditions for sheet/plate and strip
  • AEN 10095 Heat resisting steels and nickel alloys
  • EN 10151 Stainless steel strip for springs
  • EN 10217-7 Welded steel tubes for pressure purposes – Stainless steel tubes
  • EN 10296-2 Welded circular steel tubes for mechanical and general engineering purposes – Stainless Steel tubes
  • EN 10302 Creep resisting steels, nickel and cobalt alloys
  • ASTM A 167 Stainless and heat-resisting Cr-Ni steel plate, sheet, and strip
  • ASTM A 176 Stainless and heat-resisting Cr steel plate, sheet, and strip
  • ASTM A182 / ASME SA-182 Forged or rolled alloy-steel pipe flanges, forged fittings etc. for high temperature service
  • ASTM A 240 Heat-resisting Cr and Cr-Ni stainless steel plate, sheet and strip for pressure vessels
  • ASTM A276 Stainless and heat-resisting steel bars/shapes
  • ASTM A479 / ASME SA-479 Stainless steel bars for boilers and other pressure vessels
  • ASTM A 666 Austenitic stainless steel sheet, strip, plate, bar for structural and architectural applications
  • ASME IIA Materials. Part A – Ferrous Material Specifications

Certificates and approvals

  • ​​AD 2000 Merkblatt
  • Approval of Material Manufacturers
  • Factory Production Control Certificate
  • ISO 9001
  • ISO 14001
  • ISO 50001
  • ISO/TS 16949
  • OHSAS 18001
  • Pressure Equipment Directive (PED)



 Customer views



No chance for germshttp://www.outokumpu.com/en/stainless-news/cases/no-chance-for-germsNo chance for germsJouni LievonenCEO of Kavika Outokumpu is the natural choice for us. If any problems emerge, for example, Outokumpu can provide technical support, which we regard as very important.
When art meets architectural functionalityhttp://www.outokumpu.com/en/stainless-news/cases/when-art-meets-architectural-functionalityWhen art meets architectural functionality
Stainless steel pints close the loop on litter at Glastonbury Festivalhttp://www.outokumpu.com/en/stainless-news/cases/stainless_steel_pints_close_the_loop_on_litter_at_Glastonbury_FestivalStainless steel pints close the loop on litter at Glastonbury FestivalSteve MosbyKey Account Manager, OutokumpuUnlike plastic, which never fully degrades and cannot effectively be recycled, stainless steel is 100 percent recyclable with no loss of quality.
Outokumpu rebar chosen for cryogenic LNG project in the Netherlandshttp://www.outokumpu.com/en/stainless-news/cases/Outokumpu_rebar_chosen_for_cryogenic_LNG_project_in_the_NetherlandsOutokumpu rebar chosen for cryogenic LNG project in the NetherlandsRichard WigmansOutokumpu stainless steel rebar agent for Benelux & Germany If you’re working with cryogenic concrete, the rebar must be stainless steel. It is the only thing you can use. Nothing else will work.
A better brew with local stainlesshttp://www.outokumpu.com/en/stainless-news/cases/a-better-brew-with-local-stainlessA better brew with local stainlessMikko AhokasChairman of the Board, SangenOur brewery is based in Tornio, and it is only logical to buy from Outokumpu, who has a world-class stainless steel plant in town. Local production is something that our customers also value
Sculpture in central Stockholm celebrates metallic materialshttp://www.outokumpu.com/en/stainless-news/cases/sculpture-in-central-stockholm-celebrates-metallic-materialsSculpture in central Stockholm celebrates metallic materialsSandra ArmanProduct ManagerThe Droppen sculpture not only captures the long history of metal and steel production in Sweden but also honors our world class metal forming expertise
Core 4622 combats chemical spills in portshttp://www.outokumpu.com/en/stainless-news/cases/Core-4622-combats-chemical-spills-in-portsCore 4622 combats chemical spills in portsMarkku YlikahriProduct Manager, Langh Cargo Solutions.Built from ferritic stainless steel and also having a roof, the Spill Tank Container is the first its kind built specifically for Nordic conditions.
Smooth stainless phone boothhttp://www.outokumpu.com/en/stainless-news/cases/smooth-stainless-phone-boothSmooth stainless phone boothOssi PaijaCEO, FrameryOutokumpu helped us find the right magnetic grade and the ideal surface treatment. Steel is robust, easy to handle and offers good sound insulation properties – plus a fabulous, sleek look, so it’s a win-win-win in every way.
Colorful stainless tiles for colorful characters and projectshttp://www.outokumpu.com/en/stainless-news/cases/colorful-stainless-tiles-for-colorful-characters-and-projectsColorful stainless tiles for colorful characters and projectsWalter HaukPresident and owner, Millennium Tiles LLCOutokumpu provides us with a special chemistry for our coil, mostly ordered in 304 and 316. This special chemistry brings out the more intense colors that we would otherwise not get
4622 shines from 7-Elevenhttp://www.outokumpu.com/en/stainless-news/cases/4622-shines-from-7-eleven4622 shines from 7-ElevenNoppol ChuklinManaging Director, Thailand's RBS GroupFor the equipment RBS was supplying to 7-Eleven, it was critical that the stainless steel would offer needed corrosion resistance with good weldability

Stainless steel finder

Stainless Steel Finder is a tool for easily comparing and finding details of all Outokumpu stainless steel grades​​​​

Go to Steel Finder