1, ferritic stainless steel: containing 12% ~ 30% chromium. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its chloride stress corrosion resistance is better than other kinds of stainless steel. There are Crl7, Cr 17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, etc. Ferritic stainless steel has good corrosion resistance and oxidation resistance because of its high chromium content, but its mechanical properties and technological properties are poor, so it is mostly used in acid-resistant structures with less stress and as oxidation-resistant steel. This kind of steel can resist the corrosion of atmosphere, nitric acid and brine solution, and has the characteristics of good oxidation resistance at high temperature and small thermal expansion coefficient. It can be used in nitric acid and food factory equipment, and can also be used to manufacture parts that work at high temperature, such as gas turbine parts.
2. Austenitic stainless steel: containing more than 18% of chromium, about 8% of nickel and a small amount of elements such as molybdenum, titanium and nitrogen. Good comprehensive performance, corrosion resistance to various media. Commonly used brands of austenitic stainless steel are 1Cr 18Ni9, 0Cr 19Ni9, etc. lavatory
3. Austenite-ferrite duplex stainless steel: It has the advantages of both austenitic and ferritic stainless steel and is superplastic. About half austenite and half ferrite stainless steel. In the case of low C content, Cr content is 18%~28%, and Ni content is 3%~ 10%. Some steels also contain alloying elements, such as molybdenum, copper, silicon, niobium, titanium and nitrogen. This steel has the characteristics of both austenitic and ferritic stainless steel. Compared with ferritic steel, it has higher plasticity and toughness, no brittleness at room temperature, significantly improved intergranular corrosion resistance and weldability, and maintained the brittleness, high thermal conductivity and superplasticity of ferritic stainless steel at 475℃. Compared with austenitic stainless steel, it has high strength and obviously improved intergranular corrosion resistance and chloride stress corrosion resistance. Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel. 4. Martensite stainless steel: high strength, but poor plasticity and weldability. Commonly used brands of martensitic stainless steel are 1Cr 13, 3Cr 13, etc. Martensite stainless steel has high strength, hardness and wear resistance due to its high carbon content, but its corrosion resistance is slightly poor. Used for some parts with high mechanical performance and general corrosion resistance requirements, such as springs, steam turbine blades, hydraulic machine valves, etc. This kind of steel is used after quenching and tempering. Because stainless steel has many ideal properties required by building materials, it can be said to be unique among metals, and its development continues. In order to improve the performance of stainless steel in traditional applications, the existing types have been improved, and new stainless steel is being developed to meet the strict requirements of advanced building applications. Due to the continuous improvement of production efficiency and quality, stainless steel has become one of the most cost-effective materials chosen by architects. Stainless steel combines performance, appearance and use characteristics, so it will still be one of the best building materials in the world. China Stainless Steel Marketing Network integrates the service platform of stainless steel and stainless steel supply chain information, and provides information and consulting services for members and users around the world by setting up several columns such as stainless steel industry information, industry observation, enterprise management, stainless steel design, stainless steel forum, equipment and materials, exhibition information, stainless steel knowledge and talent recruitment. , through the latest information, database, database, analysis and prediction, communication platform, etc. Provide trade information and seek business opportunities for stainless steel industry and related industries; Spread stainless steel culture and home life art, and provide stainless steel consumption knowledge.