Compared with austenitic stainless steel and ferritic stainless steel, it has better corrosion resistance. Also known as Lean Duplex stainless steel, its chemical composition is as follows:- Carbon(C): 0 max030% - Manganese (MN): 2 max00% - Phosphorus (p): 0. max040% - Sulfur (s): 0. max030% - Chromium (CR): 210-24.0% - Nickel (Ni): 30-5.5% - Molybdenum (Mo): 005-0.60% - Nitrogen (n): 010-0.22% - Copper (Cu): 005-0.60%
The mechanical properties are mainly manifested in the following aspects:
1.High strength: with high yield strength and tensile strength, 2It has good plasticity and ductility, which is conducive to processing into parts of various shapes and sizes. 3.It shows good plasticity and deformability in the process of cold and hot processing, and is convenient for manufacturing into various engineering parts and structures. 4.Due to its special tissue structure, it has good fatigue resistance and can maintain stable performance during long-term use.
Some common information on welding properties:
1.Welding methods: welding is carried out by common welding methods, such as arc welding (including manual arc welding and argon arc welding), resistance welding and laser welding. 2.Pre-treatment: Before welding, proper treatments are usually required, such as cleaning the surface and removing grease and impurities. In addition, pre-heating can also improve welding performance. 3.Welding consumables: Commonly used welding consumables include welding wires or electrodes of the same or similar composition. 4.Welding control: During the welding process, it is important to control the low heat input to avoid excessive thermal stress. In addition, the appropriate welding parameters and welding speed also need to be adjusted on a case-by-case basis. 5.Post-treatment: After the welding is complete, appropriate post-treatment, such as annealing or heat treatment, may be required to restore the properties and ductility of the material.
The main corrosion resistance includes the following aspects:
1. Stress corrosion cracking resistance: It has good stress corrosion cracking resistance, especially in high chloride ion environment, which is special in other stainless steels.
2. Intergranular corrosion resistance: It contains stable chromium and molybdenum, so it has excellent intergranular corrosion resistance, which is also a good performance that other stainless steels basically do not have.
3. General corrosion resistance: It has very good corrosion resistance in tropical and marine environments, and can maintain good corrosion resistance for a long time even under high temperature, high salinity and high immersion conditions.
Main application areas:1Chemical industry: It can be used in chemical equipment, pipelines, storage tanks and other fields, especially in the case of stress corrosion cracking and corrosion resistance. 2.Marine engineering: Due to its good resistance to salt water corrosion, it is often used in seawater treatment equipment and offshore platform structures in the field of marine engineering. 3.Food processing industry: It is widely used in food processing equipment, food storage containers, etc., because it will not react with food or produce contamination. 4.Architectural Decoration: It is also commonly used in architectural decoration, furniture manufacturing, and other fields, and its aesthetics and durability make it one of the popular materials.