2507 (standard 022Cr25Ni7Mo4N, super duplex stainless steel), composed of an austenite + ferrite dual-phase microstructure, with high alloy ratios of chromium, nickel, molybdenum, and nitrogen, integrates high strength and exceptional corrosion resistance. Its performance exceeds that of 304 and 316L, making it a high-end special pipe material for harsh corrosive conditions. The product is mainly made of seamless industrial thick-walled pipes, accompanied by high-precision precision-polished welded pipes. It supports customized processing such as beveling, bending, polishing, and fixed-length cutting.

Product Parameters

Chemical composition of each grade:

Performance data of various grades of metal (for reference only) :

Physical properties of each grade:

Core Performance Advantages

Superior Resistance to Chloride Ion Corrosion and Seawater Salt Spray:High-molybdenum, high-nitrogen formula, its resistance to pitting and crevice corrosion is several times that of 316L stainless steel. It can withstand long-term immersion in seawater, high-salt wastewater, and brine without rust spots or perforations on beaches or offshore platforms.

Resistant to Various Acids, Alkalis, and Chemical Corrosion Media:Resistant to chlorides, dilute sulfuric acid, phosphoric acid, salt solutions, and bleaching agents. Ideal for chemical pickling, electroplating, and desulfurization/denitrification pipelines.

Resistant to Stress Corrosion Cracking:Less prone to stress cracking in seawater and high-temperature brine environments, solving the problem of easy cracking in 304 and 316L stainless steel under long-term high-temperature and salt-containing media.

Stable Under High and Low Temperature Conditions:No embrittlement at low temperatures; maximum long-term operating temperature 300℃. Suitable for heat exchange and high-temperature chemical fluid pipelines. Excellent weldability; the pipe material has an ultra-low carbon design, eliminating the risk of intergranular corrosion after welding.

Resistant to Intergranular Corrosion:Applicable Industry Scenarios

Marine Engineering: Seawater desalination equipment, subsea pipelines, offshore platforms, ship seawater pipelines;

Environmental Desulfurization: Power plant flue gas desulfurization and denitrification, deep wastewater treatment, landfill leachate pipelines;

Chemical Industry: Pickling production lines, electroplating equipment, salt chemicals, chlorine-containing media pipelines for oil and gas extraction;

Water Treatment: High-salinity wastewater, large-scale swimming pool circulation systems, brine transportation;

Energy Equipment: Heat exchangers, heat exchange tube bundles for high-temperature corrosion conditions, oil and gas gathering and transportation pipelines;

Special Equipment: Seawater cooling units, marine testing equipment, corrosion-resistant high-pressure hydraulic pipelines.