The rolling method is divided into hot rolling, hot extrusion and cold drawing (rolling) 430 stainless steel. According to the metallographic structure of 430 stainless iron, it can be divided into semi-ferritic and semi-martensitic 430 stainless iron, martensitic 430 stainless iron, austenitic 430 stainless iron, and austenitic-ferritic iron 430 stainless steel. Rust iron etc.
(1) Ferritic 430 stainless steel
Contains only chromium, which can improve general corrosion resistance, low corrosion resistance, and is less used for building exteriors. It has a fermented body structure and is magnetic.
(2) Austenitic 430 stainless steel
Contains not only chromium, but also nickel or nickel and molybdenum. Nickel stabilizes the austenitic structure to form austenitic 430 stainless iron, which improves toughness, ductility, weldability and resistance to reducing acids. Molybdenum improves resistance to pitting and crevice corrosion. The characteristics of austenitic 430 stainless iron are that it reflects the comprehensive performance of construction metal applications, such as: good corrosion resistance, high strength and processing resistance, etc. It is the most commonly used type of 430 stainless steel for building exteriors.
(3) Duplex 430 stainless steel
It has austenite and ferrite structure, and contains chromium, nickel, molybdenum and nitrogen. Nitrogen improves resistance to pitting and crevice corrosion, especially the strength of 430 stainless steel. It is mainly used in places with high requirements on strength and corrosion resistance outside the building.