-2507 Cold Rolled Stainless Steel coil, Cold rolled 2507 coil, 2507 CRC.
-2507 Hot Rolled Stainless Steel coil, Hot Rolled 2507 coil, 2507 HRC.
Duplex 2507 stainless steel is a highly alloyed duplex stainless steel grade, also known as UNS S32750. It contains higher amounts of chromium, molybdenum, and nitrogen compared to standard duplex stainless steels, providing exceptional strength, corrosion resistance, and resistance to pitting and crevice corrosion.
| Element | Composition Range (%) |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Carbon (C) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.020 max |
Chromium (Cr): Chromium is the primary alloying element in stainless steel and contributes to its corrosion resistance. In Duplex 2507, chromium content is typically around 24-26%.
Nickel (Ni): Nickel is another essential element in stainless steel that enhances its resistance to corrosion and provides stability to the austenite phase. The nickel content in Duplex 2507 is approximately 6-8%.
Molybdenum (Mo): Molybdenum adds further corrosion resistance to stainless steel, particularly in chloride-rich environments. Duplex 2507 contains about 3-5% molybdenum.
Nitrogen (N): Nitrogen is an important element in Duplex 2507, as it enhances the material’s strength and contributes to its ability to form a stable dual-phase microstructure.
Carbon (C): The carbon content in Duplex 2507 is typically kept low to avoid the formation of harmful carbides that could impair its corrosion resistance.
Silicon (Si): Silicon helps improve the material’s resistance to oxidation and scaling at high temperatures.
Manganese (Mn): Manganese is added to enhance the material’s strength and toughness.
Phosphorus (P) and Sulfur (S): These elements are generally kept at low levels to maintain the material’s corrosion resistance and mechanical properties.
The unique combination of these elements in Duplex 2507 stainless steel results in a dual-phase microstructure consisting of both austenite and ferrite phases. This duplex structure provides the material with excellent corrosion resistance, high strength, and good ductility, making it suitable for various challenging applications.
| Property | Performance of Duplex 2507 Stainless Steel |
|---|---|
| Corrosion Resistance | Excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking (ClSCC) in aggressive environments, including marine and acidic conditions. |
| Mechanical Strength | Higher mechanical strength compared to standard austenitic and ferritic stainless steels, providing excellent tensile and yield strength. |
| Ductility and Toughness | Good ductility and toughness, allowing it to withstand mechanical impacts and stresses without failure. |
| Thermal Conductivity | Higher thermal conductivity compared to austenitic stainless steels. |
| Erosion and Abrasion Resistance | Resistant to erosion and abrasion, making it suitable for applications in mining and offshore industries. |
| Sulfide Stress Corrosion Cracking (SSC) Resistance | Exhibits good resistance to sulfide stress corrosion cracking in sour gas environments, ideal for oil and gas applications. |
| Biocompatibility | Displays good biocompatibility, making it suitable for certain medical and bioengineering applications. |
| Cost-Effectiveness | Offers a cost-effective alternative to high-nickel super-austenitic stainless steels, providing comparable or superior performance in specific applications. |
| Weldability | Readily weldable with appropriate techniques, but requires careful heat input control and post-weld treatments to maintain properties. |
| Thermal Expansion | Lower thermal expansion coefficient compared to austenitic stainless steels, providing dimensional stability under varying temperatures. |
| Range of Applications | Suitable for various industries, including chemical processing, oil and gas, marine, desalination, and pulp and paper, among others. |
2507 | C % | Si % | Mn % | P % | S % | Ni % | Cr % | Mo % | N % | Cu % |
ASTM | 0.03 | 0.08 | 2.00 | 0.035 | 0.02 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
DIN/EN | 0,03 | 1,00 | 2,00 | 0,035 | 0,015 | 6,0-8,0 | 24,0-26,0 | 3,0-4,5 | 0,24-0,35 | – |
JIS | – | – | – | – | – | – | – | – | – | – |
GB | 0.03 | 0.08 | 1.20 | 0.035 | 0.02 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
Duplex 2507 stainless steel’s exceptional combination of properties makes it well-suited for a wide range of applications in various industries. Some typical applications include:
Oil and Gas Industry: Duplex 2507 is used in offshore and onshore oil and gas exploration and production applications, such as subsea equipment, piping systems, and pressure vessels, where its high strength and corrosion resistance are crucial in harsh and corrosive environments.
Chemical Processing: The material’s resistance to corrosive chemicals makes it suitable for chemical processing equipment, including reactors, heat exchangers, and storage tanks.
Desalination Plants: Duplex 2507 is used in seawater desalination plants for heat exchangers, brine heaters, and piping systems, where it resists corrosion and fouling.
Pulp and Paper Industry: Duplex 2507 is employed in the pulp and paper industry for digester and bleach plant equipment, where it withstands the corrosive effects of chemicals and process fluids.
Marine and Coastal Applications: Due to its excellent resistance to seawater and chloride-rich environments, Duplex 2507 is utilized in marine and coastal structures, seawater intake systems, and shipbuilding.
Mining Industry: The material’s high strength and abrasion resistance make it suitable for mining equipment, such as crushers, screens, and slurry pumps.
Water Treatment: Duplex 2507 is used in water treatment facilities for its resistance to corrosion and pitting in various water conditions.
Structural Components: In construction and architecture, Duplex 2507 stainless steel is used in structural components for its strength, durability, and aesthetic appeal.
Power Generation: The material finds applications in power generation facilities, including power plants and nuclear reactors, where it resists corrosion under high-temperature and pressure conditions.
Chemical Tankers: Duplex 2507 is used in the construction of chemical tankers for the transportation of hazardous chemicals due to its corrosion resistance.
Heat Exchangers: The material is employed in heat exchangers for its excellent heat transfer properties and resistance to corrosion.
Food Processing: Duplex 2507 is used in food processing equipment due to its corrosion resistance and ease of cleaning.
These are just a few examples of the many applications where Duplex 2507 stainless steel is used. Its versatility and superior properties make it a preferred choice in industries that require reliable performance in aggressive and demanding environments.
How does the higher alloying content of Duplex 2507 contribute t
The higher alloying content of Duplex 2507 compared to other duplex stainless steel grades significantly contributes to its superior performance, providing a unique combination of properties that make it stand out in various applications. The key aspects influenced by its higher alloying content are:
Enhanced Corrosion Resistance: Duplex 2507 contains higher levels of chromium, nickel, and molybdenum, which boost its resistance to corrosion, especially in aggressive environments containing chlorides and acidic solutions. This superior corrosion resistance surpasses many other duplex stainless steel grades, making it suitable for challenging applications in marine, chemical, and oil and gas industries.
Higher Strength: The increased alloying elements in Duplex 2507 contribute to its higher mechanical strength, providing improved structural integrity and load-bearing capabilities compared to other duplex grades. This enhanced strength is essential for demanding applications that require robust materials.
Improved Ductility and Toughness: The combination of austenite and ferrite phases in Duplex 2507, facilitated by the higher nitrogen content, results in improved ductility and toughness. This ensures better resistance to mechanical impacts and deformation, increasing the material’s reliability in dynamic environments.
Resistance to Stress Corrosion Cracking (SCC): The higher alloying content, particularly molybdenum and nitrogen, contributes to Duplex 2507’s enhanced resistance to stress corrosion cracking, a common failure mode in chloride-rich environments. This property makes it well-suited for applications in which SCC is a concern.
Superior Pitting and Crevice Corrosion Resistance: Duplex 2507’s higher chromium and molybdenum content provide exceptional resistance to pitting and crevice corrosion, offering improved protection against localized corrosion damage in aggressive environments.
Suitability for High-Temperature Applications: The elevated alloying elements in Duplex 2507 contribute to its ability to withstand elevated temperatures, making it suitable for applications involving thermal cycling and high-temperature exposure.
Chloride Ion Resistance: Due to its higher alloying elements, Duplex 2507 exhibits superior resistance to chloride ion attack, making it an excellent choice for applications in coastal and marine environments.
Overall, the higher alloying content of Duplex 2507 plays a vital role in its superior performance compared to other duplex stainless steel grades, making it a versatile and reliable material for critical applications in various industries.
o its superior performance compared to other duplex stainless steel grades?
Duplex 2507 stainless steel and Duplex 2205 are both duplex stainless steels, but they have some key differences in their composition and performance. Additionally, when compared to other stainless steel grades, Duplex 2507 stainless steel exhibits distinct advantages. Here’s a comparison:
Composition: Duplex 2507 stainless steel contains higher levels of chromium, nickel, and molybdenum compared to Duplex 2205stainless steel . This higher alloying content in Duplex 2507stainless steel contributes to its superior corrosion resistance and mechanical properties.
Corrosion Resistance: Duplex 2507 stainless steel offers better corrosion resistance than Duplex 2205 stainless steel, particularly in aggressive environments containing chlorides and acidic solutions. It provides enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking compared to many other stainless steel grades.
Strength and Toughness: Duplex 2507 stainless steel has higher mechanical strength and better toughness compared to Duplex 2205 stainless steel, making it more suitable for demanding applications that require robust materials.
Nitrogen Content: Duplex 2507 stainless steel has a higher nitrogen content, which contributes to the formation of a stable dual-phase microstructure, enhancing its overall performance.
Temperature Limitations: Duplex 2507 stainless steel has a higher upper temperature limit compared to Duplex 2205 stainless steel , allowing it to perform well in high-temperature applications.
Price and Availability: Duplex 2205 stainless steel is generally more widely available and less expensive than Duplex 2507 stainless steel. However, considering its superior properties, Duplex 2507 stainless steel is often preferred for critical applications despite the higher cost.
Comparison to Other Grades: When compared to other stainless steel grades, Duplex 2507 stainless steel stands out with its exceptional combination of corrosion resistance, strength, and toughness. It offers superior performance in aggressive environments and has a wider temperature range of usability compared to many other stainless steels.
In summary, Duplex 2507 stainless steel outperforms Duplex 2205 in terms of corrosion resistance, mechanical properties, and temperature capabilities. While it may be more expensive than Duplex 2205 and some other stainless steel grades, its unique combination of properties makes it an ideal choice for challenging applications in various industries.
Welding and fabricating components made of Duplex 2507 stainless steel require careful consideration due to its unique dual-phase microstructure and high alloy content. Here are the key considerations:
Pre-Weld Cleaning: Prior to welding, thorough cleaning of the material is essential to remove any contaminants, oils, or greases that could affect the quality of the weld.
Heat Input Control: Duplex 2507 is sensitive to excessive heat input during welding, which can lead to the formation of undesirable phases and reduced corrosion resistance. Therefore, it’s crucial to control the heat input and use appropriate welding parameters.
Welding Method: Suitable welding methods for Duplex 2507 include gas tungsten arc welding (GTAW/TIG), gas metal arc welding (GMAW/MIG), and shielded metal arc welding (SMAW). TIG welding is often preferred for its precise control over the heat input.
Filler Material Selection: Matching or overmatching filler materials with higher alloy content are generally used to ensure that the weld metal’s composition is comparable to the base metal, maintaining the material’s properties.
Post-Weld Treatment: Duplex 2507 typically requires a post-weld solution annealing treatment to restore its dual-phase microstructure and optimize its mechanical properties and corrosion resistance.
Avoiding Stress Concentrations: Fabrication processes should aim to minimize sharp edges, notches, and stress concentrators, as they can lead to localized corrosion and mechanical failures.
Interpass Temperature Control: In multi-pass welding, controlling the interpass temperature is essential to prevent excessive heat buildup and maintain the desired microstructure.
Preventing Contamination: Avoiding contact with carbon steel tools and equipment is crucial, as even small amounts of carbon can adversely affect the material’s performance.
Preventing Heat Tinting: Heat tinting caused by excessive welding temperatures can lead to chromium carbide precipitation and reduced corrosion resistance. Proper shielding and post-weld cleaning can prevent this issue.
Testing and Inspection: Welded components should undergo non-destructive testing (NDT) and inspection to ensure the quality of the welds and adherence to specifications.
Workmanship and Skill: Welding and fabrication of Duplex 2507 require skilled and experienced welders familiar with the unique challenges of working with this material.
By adhering to these considerations, welding and fabricating components made of Duplex 2507 stainless steel can result in high-quality, reliable products with excellent corrosion resistance and mechanical properties.
When selecting suppliers for Duplex 2507 stainless steel products, several crucial factors should be considered to ensure the procurement of high-quality materials and reliable services. These factors include:
Quality and Certification: Verify that the supplier provides Duplex 2507 stainless steel products with relevant quality certifications, such as ASTM, ASME, or EN standards. Look for ISO or other accredited certifications to ensure consistent quality and adherence to industry norms.
Experience and Reputation: Choose suppliers with a proven track record and extensive experience in handling Duplex 2507 stainless steel. Check customer reviews and testimonials to gauge their reputation and reliability.
Material Traceability: Ensure the supplier offers full material traceability, providing information on the origin, production, and testing of the Duplex 2507 stainless steel products.
Product Range: Consider suppliers who offer a wide range of Duplex 2507 products, including pipes, tubes, fittings, flanges, bars, and plates, catering to various application requirements.
Testing and Inspection Capabilities: Inquire about the supplier’s in-house testing and inspection facilities to verify product quality and compliance with specifications. Look for suppliers who conduct non-destructive testing (NDT) and other relevant inspections.
Stock Availability: Check if the supplier maintains sufficient stock levels of Duplex 2507 products to meet immediate or urgent requirements. Timely availability is essential to prevent delays in projects.
Technical Support: Opt for suppliers who offer technical assistance and support, especially when it comes to welding, fabrication, and material selection guidance.
Cost and Pricing: Compare quotes from different suppliers to ensure competitive pricing without compromising quality. Be wary of unusually low prices that may indicate substandard materials.
Delivery and Logistics: Evaluate the supplier’s delivery capabilities and logistics network to ensure on-time deliveries and efficient transportation.
Customer Service: A supplier with excellent customer service is more likely to address inquiries promptly, provide accurate information, and resolve issues effectively.
Global Presence: If your projects involve international operations, consider suppliers with a global presence or reliable export capabilities.
Environmental and Ethical Practices: Look for suppliers committed to sustainable and environmentally responsible practices, as well as ethical labor and sourcing standards.
Customization Options: If your projects require specific or custom-made Duplex 2507 products, assess the supplier’s ability to provide tailor-made solutions.
By thoroughly evaluating these factors, you can select a reliable supplier for Duplex 2507 stainless steel products, ensuring the success of your projects and the longevity of your applications.
You might also enjoy
Mastering PVD Stainless Steel Coatings: A Guide to Durability, Aesthetics, and Applications
Read More »
Copyright@2023 Huaxiao Metal Corporation Limited . All rights are reserved
Feel free to contact us！
If you need our products, please leave us a message with the specific specifications and quantity through the window on the right!
Reply within 24 hours
