Duplex 2507 Stainless Steel Coil Tisco ASME SA240 Hot Rolled 0.8 1.0 1.2 1.5 2.0 mm No. 4 Surface High Stability Chemical Treatment 2507

Daxun is a premier 2507 Duplex Steel Coil supplier in China, offering a comprehensive range of coil thicknesses from 0.5mm to 3.16mm. Known for its cost-effectiveness compared to 904L or 6% molybdenum super austenitic stainless steel, the Alloy 2507 (UNS S32750) is a super duplex stainless steel with a robust composition of 25% chromium, 4% molybdenum, and 7% nickel. Designed for the most demanding applications, it excels in high strength and superior corrosion resistance, making it ideal for chemical processing, petrochemical, and seawater equipment. Its exceptional resistance to chloride stress corrosion cracking, high thermal conductivity, and low coefficient of thermal expansion further enhance its utility. The high concentrations of chromium, molybdenum, and nitrogen ensure formidable resistance to pitting, crevice corrosion, and general corrosion.

Duplex 2507 stainless steel is an exceptional super duplex grade, boasting a low carbon content (up to 0.03%) and a unique blend of chromium (~25%), nickel (~7%), and molybdenum (~4%). Specifically engineered for applications demanding unparalleled strength and superior resistance to corrosion, Duplex 2507 is ideal for chemical process equipment, the petrochemical sector, and seawater infrastructure. Its resilience against chloride-induced stress corrosion cracking is noteworthy. Thanks to its high levels of chromium, molybdenum, and nitrogen, it offers outstanding protection against pitting, crevice, and general corrosion, making it a top choice for challenging environments.

• The production of Duplex 2507 stainless steel mirrors that of other high-alloy steels. The process kicks off in an electric arc furnace, where scrap steel is melted and alloyed. Once molten, the steel is transferred to an AOD (argon oxygen decarburization) converter. Here, critical steps such as decarburization, sulfur refinement, and gas elimination are meticulously carried out to achieve the desired composition.

• During the AOD process, nitrogen is typically incorporated. The steel then progresses to the ladle furnace for fine-tuning of its inclusions, ensuring optimal quality.

• Post these initial stages, the molten steel is cast into either solitary ingots or continuously produced blooms. These solidified forms are then reheated and subjected to forging or rolling to attain the specified thickness. A solution annealing heat treatment followed by water quenching ensures a homogeneous internal structure, vital for the steel's integrity.

• Fabrication of Duplex 2507 pipes can be executed via hot or cold forming techniques. Hot forming requires temperatures between 1024 °C and 1232 °C, followed by solution annealing at 1052-1125 °C and rapid water quenching. Cold forming methods, such as bending, deep drawing, extruding, and pressing, necessitate subsequent heat treatment, including solution annealing and quenching, to preserve the material's properties.

• Duplex 2507 stainless steel stands out as a super duplex category within the duplex family. Duplex stainless steels feature a microstructure combining ferrite and austenite in nearly equal parts, harnessing the best traits of both phases. This results in high corrosion resistance coupled with strong mechanical strength. Despite the shared attributes, different duplex grades offer varying corrosion resistance levels, contingent on their specific alloy compositions. While duplex steels exhibit excellent resistance to localized corrosion such as pitting, crevice corrosion, and stress corrosion cracking, their exact performance hinges on the grade and PREN (Pitting Resistance Equivalent Number). Super duplex stainless steels, including Duplex 2507, boast a PREN range of 38 to 45, signifying their superior corrosion resistance.

Some common applications of Duplex 2507 stainless steel include:

1. Desalination.

2. Oil and gas industry equipment, including offshore platforms, pipelines, and well casings.

3. Chemical processing equipment, especially for handling corrosive chemicals.

4. Pulp and paper industry, particularly bleaching process equipment.

5. Petrochemical industry applications, including PVC strippers.

6. Water desalination plants.

7. Power industry equipment, such as flue gas desulfurization (FGD) systems.

8. Marine components, including ship propellers and shafts.

9. Pollution control equipment such as scrubbers.

10. Fittings are vital components for seamlessly connecting and regulating fluid flow within pipelines and systems. These essential elements include elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples, among others.

The advantages of using Duplex 2507 stainless steel include:

• Duplex 2507 stainless steel boasts exceptional resistance to pitting corrosion, with a PREN of up to 43. This surpasses stainless steel grades such as 254SMO. Additionally, Duplex 2507 offers high resistance to various other types of corrosion, including Stress Corrosion Cracking (SCC), crevice corrosion, and general corrosion. These combined properties render Duplex 2507 a versatile and reliable choice for numerous applications in challenging environments.

• Duplex 2507 provides double the yield strength compared to 300 series stainless steel. This increased strength allows for the use of thinner steel sections, reducing material costs for equipment operating under similar load conditions.

• Duplex 2507 boasts twice the yield and tensile strength of standard stainless steel, significantly enhancing wear resistance.

• ASTM/ASME ...... A240 - UNS S32750
  EURONORM ...... 1.4410 - X2 Cr Ni MoN 25.7.4
  AFNOR ............ Z3 CN 25.06 Az