Stainless steel classification: austenitic stainless steel, martensitic stainless steel, ferritic stainless steel and austenitic-ferritic duplex stainless steel, etc.
1. Austenitic stainless steel: contains about 18% chromium, and also contains about 8% nickel and a small amount of titanium, nitrogen, molybdenum and other elements. The comprehensive performance is relatively good, and it can withstand the corrosion of various media. Most of them are used to make some acid-resistant equipment, such as corrosion-resistant containers or equipment parts of conveying pipelines.
2. Martensitic stainless steel: The strength is relatively high, but the plasticity and weldability are relatively poor. Its more commonly used models are 1Cr13 and 3Cr13. Because of the relatively high carbon content, it has high strength, hardness and wear resistance. However, the corrosion resistance will be worse than other steel bodies, and it is usually used in some parts with mechanical properties, such as springs and turbine blades.
3. It contains 12% to 30% chromium, and their corrosion resistance, toughness and weldability increase with the increase of chromium content, and this type of steel can resist the atmosphere It has good resistance to high temperature and oxidation, and is very suitable for factory equipment of nitric acid and food.
