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309/309S/309H Stainless Steel Supplier
When talking about China 309/309S/309H stainless steel manufacturers, we have to mention Huaxiao Metal’s outstanding position in the stainless steel industry. Huaxiao Metal is famous for its advanced manufacturing technology and high-quality products, and 309/309S/309H stainless steel is one of the outstanding representatives. While ensuring product quality, Huaxiao Metal manufacturers also pay attention to the design and performance of stainless steel plates.
When considering purchasing 309/309S/309H stainless steel, price is a key factor. Fortunately, Huaxiao Metal manufacturers offer competitive prices, making these high-quality stainless steels even more attractive. Whether used in construction, manufacturing or other industries, 309/309S/309H stainless steel is relatively reasonably priced, providing customers with an affordable choice.
Overall, Huaxiao Metal 309/309S/309H stainless steel manufacturer provides customers with reliable and high-performance stainless steel options with its excellent technical strength and competitive prices. Whether you are looking for building materials or industrial applications, these manufacturers can meet your needs for high-quality stainless steel products.
Looking forward to becoming one of your 309H/309S/309 stainless steel suppliers in China!
What is 309/309S/309H Stainless Steel?
309 Stainless Steel:
- Composition: 309 stainless steel is an austenitic stainless steel that typically contains around 20% chromium and 10% nickel. It also has a small amount of manganese, silicon, and iron.
- Properties: It offers good corrosion resistance, particularly in high-temperature environments. It is known for its high-temperature strength and resistance to oxidation.
- Applications: Commonly used in applications involving elevated temperatures, such as in furnaces, heat exchangers, and various industrial heating processes.
309S Stainless Steel:
- Composition: 309S is a variant of 309 with a lower carbon content (less than 0.08%). This reduced carbon content minimizes the risk of sensitization and intergranular corrosion that can occur during welding.
- Properties: Similar to 309, 309S offers good corrosion resistance and high-temperature strength, with the advantage of improved weldability.
- Applications: Widely used in welding applications where corrosion resistance at high temperatures is essential, such as in the manufacturing of boilers and pressure vessels.
309H Stainless Steel:
- Composition: 309H has a higher carbon content compared to 309, typically in the range of 0.04-0.10%. This higher carbon content enhances its high-temperature strength.
- Properties: It possesses increased strength at elevated temperatures but may be more susceptible to sensitization during welding.
- Applications: Suitable for applications requiring higher strength at elevated temperatures, such as in boiler tubes and other high-temperature environments.
In summary, all three grades (309, 309S, and 309H) are austenitic stainless steels designed for use in high-temperature environments. The main differences lie in their carbon content and how this affects their welding characteristics and high-temperature performance.
Looking forward to becoming one of your 309H/309S/309 stainless steel suppliers in China!
309/309S/309H Stainless Steel Data Sheet
309/309S/309H Stainless Steel Same grade from Different Standard
| ss 309 | ss 309S | ss 309H |
|---|---|---|
| UNS S30900 | UNS S30908 | UNS S30909 |
| ASTM A240 | ASTM A240 | ASTM A240 |
| ASTM A480 | ASTM A480 | ASTM A480 |
| ASME SA240 | ASME SA240 | ASME SA240 |
| AMS 5523 | AMS 5523 | AMS 5523 |
Chemical Composition of 309/309S/309H Stainless Steel
| Element | 309 | 309S | 309H |
|---|---|---|---|
| C | 0.20 | 0.08 | 0.04–0.10 |
| Mn | 2.00 | 2.00 | 2.00 |
| Cr | 22.0–24.0 | 22.0–24.0 | 22.0–24.0 |
| Ni | 12.0–15.0 | 12.0–15.0 | 12.0–15.0 |
| P | 0.045 | 0.045 | 0.045 |
| S | 0.030 | 0.030 | 0.030 |
| Si | 0.75 | 0.75 | 0.75 |
| Fe | Balance | Balance | Balance |
Mechanical Properties of 309/309S/309H Stainless Steel
| Mechanical Properties | 309 | 309S | 309H |
|---|---|---|---|
| Tensile Strength | 75,000 psi (515 MPa) min. | 75,000 psi (515 MPa) min. | 75,000 psi (515 MPa) min. |
| Yield Strength | 30,000 psi (205 MPa) min. | 30,000 psi (205 MPa) min. | 30,000 psi (205 MPa) min. |
| Elongation in 2 inches (50.8 mm) | 40% min. | 40% min. | 40% min. |
| Hardness (Rockwell B) | 85 max. | 85 max. | 85 max. |
Looking forward to becoming one of your 309H/309S/309 stainless steel suppliers in China!
Advantages of 309/309S/309H Stainless Steel
The 309 series stainless steels (309, 309S, and 309H) offer several advantages, particularly in high-temperature and corrosive environments. Here are some key advantages:
High-Temperature Strength:
- The 309 grades are specifically designed for applications involving elevated temperatures. They exhibit excellent high-temperature strength, making them suitable for use in environments such as furnaces and heat exchangers.
Corrosion Resistance:
- These stainless steel grades provide good corrosion resistance, especially in high-temperature settings. The presence of chromium and nickel in their composition contributes to their ability to withstand corrosive environments.
Oxidation Resistance:
- The 309 series exhibits good resistance to oxidation at high temperatures. This is crucial in applications where materials are exposed to oxidative atmospheres, such as in industrial furnaces.
Weldability (309S):
- The lower carbon content in 309S improves its weldability compared to 309. Reduced carbon content helps minimize the risk of sensitization and intergranular corrosion during welding, making it a preferred choice for welding applications.
Versatility in Applications:
- These stainless steels find applications in a variety of industries, including petrochemical, chemical processing, and heat treatment industries. They are used in equipment such as boilers, heat exchangers, and furnace parts.
Chemical Composition Adjustability (309H):
- The higher carbon content in 309H provides enhanced high-temperature strength. This allows for increased versatility in applications where higher strength is required, such as in boiler tubes.
Resistance to Sulfidation:
- The 309 series has good resistance to sulfidation, which is the reaction of metals with sulfur-containing gases. This property is beneficial in applications where exposure to sulfurous environments is a concern.
Long-Term Durability:
- Due to their resistance to high temperatures and corrosion, the 309 grades exhibit long-term durability in harsh operating conditions, contributing to the longevity of equipment and components made from these materials.
It’s important to note that the selection of the appropriate grade (309, 309S, or 309H) depends on the specific requirements of the application, including factors such as temperature, welding considerations, and the nature of the corrosive environment.