F55 has high mechanical strength and good ductility, and the corrosion resistance of the marine environment in the atmosphere temperature and minus low temperature. Good abrasion resistance, corrosion and corrosion resistance, and also can be used in the working environment of acid medium. Mainly used in oil and gas and marine applications, is usually used for pressure vessels, stop valve, oil production tree, flange and pipe system. S32760 (F55), 25.7.4 X2CrNiMoCuWN, German standard 1.4501, strong corrosion resistance, mainly used in chemical processing, petrochemical and submarine equipment. It has strong resistance to chloride corrosion, high thermal conductivity and low thermal expansion coefficient. High chromium, molybdenum and nitrogen content has a high resistance to pitting corrosion, crevice corrosion and general corrosion ability. Application: oil and gas industry equipment, heat exchanger, offshore platform underwater equipment, fire equipment, utensils and chemical processing industry, high-pressure pipeline industry desalination plants RO plant and submarine pipeline mechanical components (high strength and corrosion resistant components