Typical applications
- Household, catering and architectural applications (indoor and outdoor)
- Tubular products for automotive and process industries
- Building facades
- Tanks and process equipment
Core 4622
Outokumpu Core Range
Outokumpu Core 4622
Outokumpu Core 4622 is suitable for a wide variety of applications that require good corrosion resistance, deep-drawability, weldability and machinability.
Outokumpu Core 4622
Core 4622
A nickel-free, high-chromium (21Cr) ferritic stainless steel with equal corrosion resistance to Core 304/4301. Core 4622 has excellent deep drawability and is almost ridging free, meaning it is easier to polish and has a lower overall production cost.
EN 1.4622
ASTM type -
ASTM UNS S44330
Microstructure Ferritic
Datasheet
Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 21.0
Ni -
Mo -
N -
Others Nb,Ti,Cu
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Go directly to Outokumpu Core 4622
|
Finish EN |
Finish ASTM |
Thickness (mm) |
Width (mm) |
|
1E RAP |
1 |
3.00–5.50 |
up to 1500 |
|
2E RAP |
1 |
3.00–4.50 |
up to 1500 |
|
2B |
2B |
0.50–0.69 |
up to 1250 |
|
2B |
2B |
0.80–3.00 |
up to 1500 |
|
2K |
4 |
0.50–0.69 |
up to 1250 |
|
2K |
4 |
0.80–3.00 |
up to 1500 |
|
STANDARDS AND APPROVALS |
||
|
EN 10028-7: 2016 |
Flat products made of steels for pressure purposes – Part 7: Stainless steels. |
Available |
|
PED Directive 2014/68/EU |
European Pressure Equipment Directive |
Available |
|
ASTM A240/A240M-17 |
Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
Available |
|
ASME SA-240/SA-240M, ASME BPVC.II.A-2017 |
Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessel and for General Applications |
Available |
Core 4622 (EN 1.4622) is Outokumpu’s ferritic innovation which has many unmatched properties. Core 4622 has improved corrosion resistance due to its high chromium content, and it is comparable to common austenitic grades 304 (EN 1.4301) and 304L (EN 1.4307).
Competitive and stable price
Core 4622 has excellent cost stability compared to Ni-alloyed austenitic grades and Mo-alloyed acid proof grades.
Core 4622 reduces production time of any product that requires forming via a method like deep-drawing. It has better deep drawability than austenitic grades 304 (EN 1.4301) and 304L (EN 1.4307). Because of its low degree of roping, polishing after forming is minimized and easy – thus saving both time and money.
One of Core 4622’s most significant advantages over austenitic grades is its very good weldability and machinability due to lower work hardening. This provides longer tooling life and faster machining time. In addition, in welding Core 4622 has a low risk of sensitization due to stabilization, and it has less distortion than austenitic grades due to higher heat transfer.
Upgraded potential
High chromium content makes Core 4622 an ideal choice for replacing standard austenitic grades in many applications such as catering and household products, architectural applications both indoors and outdoors, tubular products for automotive industry and process equipment such as heat exchangers. If lower alloyed ferritic grades meet corrosion problems, Core 4622 brings the needed upgraded potential.
Core 4622 fulfills ASTM UNS S44330.
Key benefits of Outokumpu Core 4622
Good corrosion resistance
- Comparable to common austenitic grades 304 (EN 1.4301) and 304L (EN 1.4307)
- Stabilization reduces sensitivity for intergranular corrosion in the welds
- Not susceptible to chloride induced stress corrosion cracking
Good deep drawability
- Better deep drawability than austenitic grades 304 (EN 1.4301) and 304L (EN 1.4307)
- Low roping degree provides easy polishing
Good weldability
- Conventional welding methods and 316L filler metals can be used. Shielding gases should be Ar/He based, mixed with maximum of 2% oxygen.
- Less distortions than austenitic grades due to higher heat transfer
- Stabilization prevents sensitization in the welds
