309 Stainless Steel Coil
What is 309 Stainless Steel Coil?
Types 309 and 309S stainless steel, designated as AISI 309 and AISI 309S, are austenitic chromium-nickel alloys known for their high corrosion resistance, excellent oxidation resistance, and robust strength at both room and elevated temperatures. AISI 309S, identified by its lower carbon content to minimize carbide precipitation, enhances weldability compared to its counterpart, AISI 309. These alloys, often referred to by their material number 1.4828 (particularly for AISI 309), showcase exceptional heat resistance, making them suitable for high-temperature applications. Despite being primarily nonmagnetic in their annealed state, they may exhibit slight magnetism upon cold working. The main distinction between these two variants lies in the carbon content: 309 stainless steel has a higher carbon level, while 309S stainless steel, or SS309S, offers improved weldability due to its reduced carbon composition, ensuring that both meet the needs of various high-temperature environments while maintaining excellent performance.
Feature of 309 Stainless Steel Coil
AISI 309 and 309S stainless steel, known for their austenitic chromium-nickel composition, are distinguished by their excellent features tailored for high-temperature applications. These alloys, often referred to by the material number 1.4828, especially for AISI 309, exhibit remarkable corrosion resistance, heat resistance, and strength across a wide temperature range. Both 309 stainless steel and its variant, AISI 309S (SS309S), share a unique ability to withstand temperatures from 1100 to 1600°F (593 to 871°C), though exposure within this range may lead to sigma phase formation, which can affect the material's ductility and impact resistance at room temperature. To mitigate this, it's advised to avoid subjecting the material to heavy mechanical impacts after exposure to high temperatures.
The machinability of 309 stainless steel coils (SS309) stands at 43% relative to AISI B1112 steel, suggesting that room temperature forming is preferable for optimal results. For welding, it's recommended to use AWS E309-16 covered electrodes or ER309 bare wire, which aligns with the alloy's composition to ensure a strong weld without compromising the steel's integrity. The versatility of 309 and 309S grades, alongside their balanced carbon content capable of meeting both 309S and 309H specifications, make these stainless steel coils a preferred choice for a broad range of high-temperature and corrosion-resistant applications.
309 Stainless Steel Chemical Composition & Technical Data Sheet
309 Stainless Steel Standards Comparison
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 309 | 309 | S30900 | 0Cr23Ni13 | 1.4828 | X15CrNiSi20-12 | 20Ch20N14S2 | X15CrNiSi20-12 | SUS 309 |
309 Stainless Steel Chemical Composition
| Grade | Standard | Chemical Composition(%) | ||||||
| C | Si | Mn | P | S | Cr | Ni | ||
| 309 | ASTM A240 | ≤0.20 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 22.00~24.00 | 12.00~15.00 |
| 309S | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 22.00~24.00 | 12.00~15.00 | |
309 Stainless Steel Mechanical Properties
| Grade | Tensile Test | Hardness Test | |||
| 0.2% Y.S(Mpa) | T.S(Mpa) | Elongation(%) | Hardness | HBN | |
| 309 | 310 | 586 | ≥50 | Annealed | 202 |
309 Stainless Steel Finish & Application
AISI 309 and 309S stainless steel coils, distinguished by their resilience to high temperatures and oxidation, are tailored for environments demanding exceptional strength and durability under thermal stress. These alloys are celebrated for their steadfast performance against creep deformation and adverse environmental conditions, making them indispensable in various high-temperature applications. Key uses encompass a range of critical components and structures including:
- Heating elements that require consistent performance at elevated temperatures.
- Parts for aircraft and jet engines where reliability under thermal stress is crucial.
- Heat exchangers designed for efficient thermal transfer in high-temperature environments.
- Equipment used in carburizing and annealing processes, benefiting from the steel's heat resistance.
- Handling equipment for sulfite liquor, demonstrating the alloy's chemical resilience.
- Kiln liners and boiler baffles, where durability at high temperatures is essential.
- Components in refinery and chemical processing equipment, where both heat tolerance and corrosion resistance are valued.
- Automotive exhaust parts, capitalizing on the alloy's heat resistance and strength.
This vast array of applications highlights the 309 and 309S coils' versatility and reliability in challenging conditions, underscoring their importance across various industries, from aerospace to chemical processing and beyond.
309 Stainless Steel Coil Package & Loading Details
Why Choose Us?
We are the cold-rolled stainless steel coil production base in China with 200,000 tons capacity annually.
1. Guaranteed Stock Availability: Experiencing stock shortages during crucial times can hinder your projects. Our robust inventory management ensures a consistent supply, ready to dispatch large quantities swiftly, keeping your operations smooth and uninterrupted.
2. Comprehensive Range of Specifications: Finding the exact stainless steel coil specifications can be challenging. We offer a diverse range of specs, ensuring you find precisely what your project demands, with the assurance of our commitment to meeting your specific needs.
3. Customized Material Processing: Custom processing needs can be demanding. Our advanced facilities provide tailored solutions, from precise dimension alterations to specific finish treatments, ensuring your requirements are met with utmost precision.
4. Accurate Shearing Services: Precision is key in stainless steel utilization, and our expert shearing services guarantee exactness in every cut, aligning perfectly with your specifications and quality expectations.
5. Cost-effectiveness is crucial in supplier selection. Our optimized procurement and cost-efficient processes ensure you receive not just premium-quality products but also the best prices, offering exceptional value for your investment.
309 Stainless Steel Coil FAQ
1. Can you provide custom 309 stainless steel?
Absolutely, we tailor 309 stainless steel to your needs, ensuring your specifications for finish, thickness, width, and physical properties are met.
2. What's the delivery timeline?
Quick delivery for trial orders within a week, while regular orders range from 7-30 days.
3. How do you guarantee your ss309 steel product quality?
Our ss309 steel products undergo rigorous inspections during manufacturing, cutting, and packaging to ensure the highest quality. And ss309 steel mill test certificate is also providable.
4. Can I get some aisi 309 samples?
We can provide a aisi 309 sample for you to check the quality. Aisi 309 sample is free and you just pay the freight.
5. What is the difference between them, 304 vs 309 stainless steel?
When comparing stainless steel grades 304 and 309, it's crucial to understand their differences to choose the right material for your needs. Here's a concise overview:
Chemical Composition and Properties:
304 Stainless Steel is characterized by its balanced composition, including approximately 18% chromium and 8% nickel. This combination offers robust corrosion resistance, making 304 suitable for a wide range of general applications.
309 Stainless Steel steps up the game with a higher chromium (around 23%) and nickel content (about 12%), enhancing its capabilities for withstanding high temperatures and oxidation. This makes 309 the go-to option for demanding, high-temperature environments.
Corrosion and Heat Resistance:
While both grades are corrosion-resistant, 309 excels in oxidation resistance at elevated temperatures, making it ideal for high-heat applications.
Applications:
304 finds its place in a myriad of settings, including kitchenware, architecture, and automotive parts, favored for its aesthetics and versatility.
309 is tailored for high-temperature applications, such as furnace parts and heat exchangers, where superior heat resistance is paramount.
Price and Selection:
Generally, the specialized nature of 309 makes it pricier than 304, given its enhanced high-temperature resistance and higher chromium and nickel content.
In essence, the choice between 304 and 309 stainless steel hinges on the application's specific needs, including temperature requirements and budget. Understanding these key differences aids in selecting the most appropriate grade to ensure optimal performance and durability.
6. What is the 309 stainless steel price？
309 stainless steel price actual price will fluctuate based on exchange rates, market conditions, etc. For details, please contact us for a quote.
