2507 stainless steel coil
The 2507 super duplex stainless steel is widely used in oil and gas exploration and production, offshore platforms, chemical processing, water treatment and other harsh corrosive environments rich in chloride ions, CO₂ and H₂S. In recent years, research on the optimization of the hot rolling process of 2507 and additive manufacturing processes such as laser powder bed fusion (LPBF) has gradually gained attention.
Product Details
2507 is a ferritic-austenitic (dual-phase) stainless steel, belonging to super dual-phase stainless steel (SDSS), with a PREN value greater than 40. Its typical chemical composition is approximately 25% Cr, 7% Ni, 4% Mo, and 0.27% N. 2507 has excellent resistance to pitting corrosion, crevice corrosion, uniform corrosion, and stress corrosion cracking, while also possessing high strength and good toughness.
2507 super dual-phase stainless steel is widely used in harsh corrosive environments such as oil and gas development, offshore platforms, and chemical processing.
2507 belongs to the third generation dual-phase stainless steel (super dual-phase stainless steel), which was developed in the late 1980s. Its higher chromium, nickel, molybdenum, and nitrogen alloy element content balances the proportion between ferrite and austenite well, making it have better corrosion resistance and higher strength.
In recent years, the development of super dual-phase stainless steel products mainly based on 2507 has gradually gained attention. However, the hot processing is difficult. Wu Min conducted thermal plasticity simulation research to address the defects such as edge cracking and surface lines that are prone to occur in 2507 hot-rolled steel coils, and optimized the hot rolling process to solve the production defects.
The research focuses on the influence laws of the ratio (ferrite/austenite) and the precipitation of harmful phases (such as σ phase, Cr2N) on the mechanical properties of 2507, especially the low-temperature impact toughness.
The application fields of 2507 super dual-phase steel include desalination plants, high-pressure RO plants and submarine pipelines, offshore platforms, heat exchangers, underwater equipment, fire-fighting equipment and seawater treatment equipment, chemical processing industry, utensils and piping industry, mechanical components (high-strength, corrosion-resistant components), oil and gas industrial equipment, corrosion parts of chemical vessels, energy industry FGD systems, industrial cleaning systems, absorption towers. 2507 stainless steel is applied in the oil and gas industry, such as offshore oil platforms (heat exchanger tubes); in the project of the Lede 22-1/15-1 gas field developed by China National Offshore Oil Corporation, to address the corrosion problems caused by the presence of chloride ions, CO2 and H2S in natural gas, the process designers selected super dual-phase stainless steel 2507 as the pipeline material for the wellhead manifold system of the offshore platform. Its applications also include water treatment and water supply systems, fire protection systems; petrochemical equipment; desalination (dilution) equipment (and high-pressure pipes, seawater pipes) in the equipment; mechanical and structural components that require both high strength and high corrosion resistance; combustion (waste) gas purification equipment.