Duplex stainless steel rod is a high-performance stainless steel material that combines the advantages of austenitic and ferritic stainless steel and has high strength, excellent corrosion resistance and good welding performance. The precise ratio of alloying elements such as chromium, nickel, molybdenum and nitrogen in its chemical composition gives it excellent mechanical properties and corrosion resistance. This kind of steel is widely used in petroleum, natural gas, chemical industry, marine engineering and other fields, and is especially suitable for high pressure, high temperature and high corrosion environments.