Introduction
AISI 2205 stainless steel coil, also known as Duplex 2205. is a high-performance stainless steel renowned for its exceptional combination of strength, corrosion resistance, and favorable cost-effectiveness. This versatile austenitic-ferritic (duplex) stainless steel offers superior properties compared to standard austenitic steels like 304 and finds application in demanding environments.
Composition
The key elements in AISI 2205 are:
Chromium (21.5% - 23.5%): Provides the foundation for excellent overall corrosion resistance.
Nickel (4.5% - 6.5%): Enhances corrosion resistance, formability, and toughness at low temperatures.
Molybdenum (3% - 3.5%): Significantly improves resistance to pitting corrosion, especially in chloride-containing environments.
Nitrogen (0.1% - 0.2%): Strengthens the microstructure and enhances pitting corrosion resistance.
Characteristics
Superior Corrosion Resistance: AISI 2205 offers exceptional resistance to various corrosion types, including pitting corrosion, crevice corrosion, stress corrosion cracking, and general corrosion. This makes it ideal for applications in harsh environments, especially those containing chlorides or other aggressive chemicals.
High Strength: Compared to standard austenitic steels, 2205 boasts superior strength and yield strength. This translates to better performance under high loads and makes it suitable for structural applications.
Good Formability: While not as formable as some austenitic steels like 304. AISI 2205 exhibits good formability in its annealed condition, allowing for moderate bending and shaping during fabrication.
Weldability: AISI 2205 can be welded, but due to its duplex microstructure, proper procedures and post-weld heat treatment are crucial to maintain optimal corrosion resistance and mechanical properties in the weld zone.
Good Toughness at Low Temperatures: AISI 2205 retains good toughness and ductility at cryogenic temperatures, making it suitable for some low-temperature applications.
Uses
Due to its exceptional combination of strength, corrosion resistance, good weldability, and relative affordability compared to higher-nickel alloys, AISI 2205 stainless steel coil finds application in various demanding environments, including:
Chemical Processing Equipment: Tanks, piping, vessels, and heat exchangers handling harsh chemicals, especially those containing chlorides, benefit from the superior corrosion resistance of 2205.
Oil and Gas Industry: Components in oil and gas production, transportation, and storage, such as pipelines, valves, and pressure vessels, can utilize 2205 for its strength and corrosion resistance.
Pulp and Paper Industry: Equipment handling corrosive bleaching solutions and other chemicals in the pulp and paper industry can benefit from the duplex properties of 2205.
Marine Applications: Shipbuilding components, offshore structures, and seawater handling equipment utilize 2205 due to its superior corrosion resistance in saltwater environments.
Desalination Plants: Components exposed to seawater and brine in desalination plants can benefit from the corrosion resistance and strength of 2205.
Additional Points
AISI 2205 comes in various standard specifications, such as ASTM A240/ASME SA240. ensuring consistent material properties.
AISI 2205 is not magnetic in its annealed state but can become slightly magnetic after cold working.
When selecting between 2205 and other stainless steel grades, consider the specific application's environment, required strength, and budget. For applications requiring the highest formability, standard austenitic steels like 304 might be a better choice. For superior high-temperature performance, higher-grade austenitic steels like 310S could be an option.
Stainless Steel Description
| Stainless Steel Coil/Sheet/Plate Information | |||||||||
| Technique | Surface Finish | Grade Series | Thickness(mm) | Width(mm) | |||||
| Main Dimension | |||||||||
| 20-850 | 1000 | 1219 | 1240 | 1250 | 1500 | ||||
| Hot Rolled | No.1 / 2E | 201/304/316L | 2.2-12.0 | √ | √ | √ | √ |
|
√ |
| Cold Rolled | 2B | 201/304/316L | 0.25-3.0 | √ | √ | √ | √ | √ | √ |
| 410S/430 | 410S/430 | 0.25-3.0 | √ | √ | √ |
|
√ | ||
| No.4 /Hairline Mirror / Linen SB |
201/304/316L/ | 0.22-3.0 | √ | √ | √ | √ | √ | √ | |
| 410S/430 | 410S/430 | 0.25-3.0 | √ | √ | √ | √ | √ | ||
| BA | 201/304 | 0.2--1.8 | √ | √ | √ | √ | √ | √ | |
| 410S/430 | 410S/430 | 0.25-3.0 | √ | √ | √ |
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2BA | 304/410S/430 | 0.25-2.0 | √ | √ | √ | √ |
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| If you need, we can customize the size according to your requirements | |||||||||
Chemical Properties of Frequently-used
| UNS | ASTM | EN | JIS | C% | Mn% | P% | S% | Si% | Cr% | Ni% | Mo% |
| S20100 | 201 | 1.4372 | SUS201 | ≤0.15 | 5.5-7.5 | ≤0.06 | ≤0.03 | ≤1.00 | 16.0-18.0 | 3.5-5.5 | - |
| S20200 | 202 | 1.4373 | SUS202 | ≤0.15 | 7.5-10.0 | ≤0.06 | ≤0.03 | ≤1.00 | 17.0-19.0 | 4.0-6.0 | - |
| S30100 | 301 | 1.4319 | SUS301 | ≤0.15 | ≤2.00 | ≤0.045 | ≤0.03 | ≤1.00 | 16.0-18.0 | 6.0-8.0 | - |
| S30400 | 304 | 1.4301 | SUS304 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 18.0-20.0 | 8.0-10.5 | - |
| S30403 | 304L | 1.4306 | SUS304L | ≤0.03 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 18.0-20.0 | 8.0-12.0 | - |
| S30908 | 309S | 1.4833 | SUS309S | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 22.0-24.0 | 12.0-15.0 | - |
| S31008 | 310S | 1.4845 | SUS310S | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤1.50 | 24.0-26.0 | 19.0-22.0 | - |
| S31600 | 316 | 1.4401 | SUS316 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| S31603 | 316L | 1.4404 | SUS316L | ≤0.03 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| S31703 | 317L | 1.4438 | SUS317L | ≤0.03 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 |
| S32100 | 321 | 1.4541 | SUS321 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 17.0-19.0 | 9.0-12.0 | - |
| S34700 | 347 | 1.455 | SUS347 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 17.0-19.0 | 9.0-13.0 | - |
| S40500 | 405 | 1.4002 | SUS405 | ≤0.08 | ≤1.00 | ≤0.04 | ≤0.03 | ≤1.00 | 11.5-14.5 | ≤0.60 | - |
| S40900 | 409 | 1.4512 | SUS409 | ≤0.08 | ≤1.00 | ≤0.045 | ≤0.03 | ≤1.00 | 10.5-11.75 | ≤0.50 | - |
| S43000 | 430 | 1.4016 | SUS430 | ≤0.12 | ≤1.00 | ≤0.040 | ≤0.03 | ≤0.75 | 16.0-18.0 | ≤0.60 | - |
| S43400 | 434 | 1.4113 | SUS434 | ≤0.12 | ≤1.00 | ≤0.040 | ≤0.03 | ≤1.00 | 16.0-18.0 | - | - |
| S44400 | 444 | 1.4521 | SUS444L | ≤0.025 | ≤1.00 | ≤0.045 | ≤0.03 | ≤1.00 | 17.5-19.5 | ≤1.00 | - |
| S40300 | 403 | - | SUS403 | ≤0.15 | 5.5-7.5 | ≤0.04 | ≤0.03 | ≤0.50 | 11.5-13.0 | ≤0.60 | - |
| S410000 | 410 | 1.40006 | SUS410 | ≤0.15 | ≤1.00 | ≤0.035 | ≤0.03 | ≤1.00 | 11.5-13.5 | ≤0.60 | ≤1.00 |
| S42000 | 420 | 1.4021 | SUS420J1 | 0.16~0.25 | ≤1.00 | ≤0.04 | ≤0.03 | ≤1.00 | 12.0-14.0 | ≤0.75 | ≤1.00 |
| S440A | 440A | 1.4028 | SUS440A | 0.60~0.75 | ≤1.00 | ≤0.04 | ≤0.03 | ≤1.00 | 16.0-18.0 | - | ≤0.75 |
| S32750 | SAD2507 | 1.441 | ≤0.03 | ≤1.2 | ≤0.035 | ≤0.02 | ≤0.80 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | |
| S31803 | SAF2205 | 1.4462 | ≤0.03 | ≤2.0 | ≤0.03 | ≤0.02 | ≤1.00 | 21.0-23.0 | 4.0-6.5 | 2.5-3.5 | |
| N08904 | 904L | 1.4539 | ≤0.0.3 | ≤2.0 | ≤0.035 | ≤0.03 | ≤1.00 | 18.0-20.0 | 23.0-25.0 | 3.0-4.0 |
Stainless Steel Material Properties
| Surface Finished | Characteristics | Characteristics |
| NO.1 | Finished by hot-rolling, smoother and pickling, characterized by white pickled surface. | Chemical industry equipment, Industrial tanks. |
| 2B | Finished by anneal treatment, pickling after cold rolling, followed by skin pass line to more brighter and smoother surface. | General application medical instruments, Tableware. |
| BA | Bright anneal treatment after cold rolling. | Kichen utenstil, Kitchen ware,Architectural purpose. |
| NO.4(Satin) | Finished by incontinuous linear brushing | Architecture,industries,Escalators, Kitchen ware, Vehicles. |
| Hairline | Finished by continuous linear brushing | |
| 8K(mirror) | A mirror-like reflective surface by polishing with finer abrasives over 800 mesh. | Refletor, Mirror, Interior- Exterior decoration for building. |
