AISI 309S Stainless Steel Coil is a highly alloyed austenitic stainless steel grade designed specifically for high-temperature applications. It offers superior resistance to oxidation and scaling at elevated temperatures compared to the standard 304 or 316 grades.
Composition:
The typical chemical composition of 309S Stainless Steel includes:
- Chromium (Cr): Approximately 22% to 24%, which provides exceptional resistance to high-temperature corrosion.
- Nickel (Ni): Around 12% to 15%, contributing to its austenitic structure, formability, and toughness at high temperatures.
- Silicon (Si) and Manganese (Mn): Added in moderate amounts to enhance high-temperature strength and stability.
- Carbon (C): Lower carbon content (max 0.08%) reduces the risk of carbide precipitation during welding, ensuring better intergranular corrosion resistance.
- Other elements like Phosphorus (P), Sulfur (S), and traces of other metals may also be present.
Characteristics:
1. High-Temperature Resistance: Offers excellent heat resistance, withstanding continuous service up to approximately 1038°C (1900°F) and short-term exposure to even higher temperatures.
2. Oxidation Resistance: Superior resistance to oxidation and scaling, making it suitable for prolonged use in furnace atmospheres and other oxidizing environments.
3. Weldability: Can be welded using conventional methods; however, preheating and post-weld heat treatment might be necessary to maintain optimal properties.
4. Formability: Although not as formable as lower-alloyed austenitic grades, it still exhibits reasonable ductility and can be formed into coils and various shapes.
5. Corrosion Resistance: Good corrosion resistance to a wide range of chemicals but primarily designed for high-temperature service rather than acidic or chloride-rich environments.
Use:
1. Heat Treatment Furnaces: Components such as furnace linings, heating elements, muffles, radiant tubes, and retorts.
2. Petroleum Refining Industry: Equipment that requires resistance to high temperatures and sulfur-bearing gases, including flue gas desulfurization systems.
3. Chemical Processing: Parts of equipment exposed to high temperatures and corrosive media, such as kilns, incinerators, and waste heat recovery units.
4. Power Generation: Boiler components, superheater and reheater tubing, and combustion chamber liners.
5. Metal Fabrication: Welding filler materials for joining dissimilar steels or where matching high-temperature performance is essential.
In summary, AISI 309S Stainless Steel Coil is a specialized material developed for demanding high-temperature applications where both oxidation resistance and mechanical integrity are paramount concerns. Its unique combination of properties makes it an indispensable choice in industries that operate under extreme thermal conditions.
Product Name | 309S Stainless Steel Coil/Strip | |
Technology | Cold rolled, Hot rolled | |
Grade | 200/300/400/900 Series. etc | |
Austenitic stainless steel | 200 Series: 201, 202 | |
300 Series: 304, 304L, 309S, 310S, 316, 316L, 316Ti, 317L, 321, 347 | ||
Ferritic stainless steel | 409L, 430, 436, 439, 441, 444, 446 | |
Martensitic stainless steel | 410, 410S, 416, 420J1, 420J2, 431,440,17-4PH | |
Duplex and Special Stainless: | S31803, S32205, S32750, 630, 904L | |
Standard | ISO, JIS, ASTM, AS, EN, GB,DIN, JIS etc | |
surface | N0.1, N0.4, 2D, 2B, HL, BA, 6K, 8K, etc | |
Delivery time | 3-15 days subject to the clients' requirement and quantity | |
Package | clients' requirement and Standard export sea-worthy packing | |
MOQ | 1 ton |
Available Size Range
Dimension | Range |
Thickness |
Cold Rolled: 0.1~6mm Hot Rolled: 3~12mm |
Width |
Cold Roled: 50~1500mm Hot Rolled: 20~2000mm or customer's request |
Length | Coil or as customer's request |
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:
Type No. | Tensile Strength, ksi | Yield Strength, ksi | Elongation in 2 inches, % | Reduction of Area, % | Brinell Hardness |
301 | 110 | 40 | 60 | 70 | 165 |
302 | 90 | 40 | 55 | 70 | 150 |
303 | 90 | 35 | 50 | 55 | 160 |
304 | 85 | 35 | 55 | 70 | 150 |
304L | 80 | 30 | 55 | 70 | 140 |
316 | 85 | 35 | 60 | 70 | 150 |
316L | 78 | 30 | 55 | 65 | 145 |
321 | 85 | 35 | 55 | 65 | 150 |
410 | 75 | 40 | 35 | 70 | 155 |
416 | 75 | 40 | 30 | 65 | 155 |
420 | 95 | 50 | 25 | - | 241 |
430F | 80 | 45 | 25 | 50 | 165 |
15-5 | 160 | 145 | 15 | - | 330 |
17-4 (Condition A) | 150 | 110 | 10 | 45 | 332 |