There is difference according to different types of stainless steel material
Stainless steel type and performance each are not identical, but on the process and methods of the rust, corrosion is basically the same, by soaking Lin Yuan stainless steel passivation liquid chemical treatment process to achieve the purpose of the effective corrosion protection. According to different materials, different types of stainless steel.
1, the Ferrite
Basically, this steel contains a certain amount of carbon, but usually less than 0.10% chrome. The microstructure of the steel carbon steel and low alloy steel have similarities. They are usually due to a lack of toughness can be heat treatment hardening, add molybdenum high chromium steel can be used in very positive conditions, such as the water of the sea. With magnetic ferrite steel, so it’s easy to corrosion cracking. At present, already can soak ferritic stainless steel passivation solution to prevent or prolong rust corrosion resistance of ferritic stainless steel.
2, Austenite
Austenitic stainless steel is the most common. The microstructure is from adding nickel, manganese, and nitrogen. The same structure can compare common steel resistance to higher temperatures. This structure provides these steel weldability and easy formability characteristics. For austenitic stainless steel containing nickel, chromium, molybdenum, and nitrogen, etc., so can more effectively improve the performance of corrosion resistance, they are useful features that can be work hardening while retaining a useful level of ductility and toughness.
High nickel austenitic steel, increased resistance to stress corrosion cracking. They are nominally non-magnetic, but often show some magnetic response, depending on the combination and work hardening steel. Austenitic stainless steel by stainless steel passivation solution after immersing, salt fog test performance can be improved more than 20 times.
3, Martensite
Martensitic stainless steel and ferritic stainless steel are similar, but martensite stainless steel with high carbon content as high as 1 makes them like carbon steel and low alloy steel. They can be used for the need of high strength and corrosion resistance ability. Martensite stainless steel also has magnetic, weldability, and formability are generally lower.
4, Duplex Stainless Steel
The steel microstructure, roughly 50 50 ferrites, and austenite. This makes the duplex stainless steel than ferritic or austenitic steel has higher strength. Stress corrosion cracking resistance is also better. “Super dual-phase steel has higher strength and corrosion resistance standards. It has good weldability but needs to take care of the choice of welding material. Duplex stainless steel has moderate formability, of course, there is a magnetic.
5, Precipitation Hardening Stainless Steel
The strength of the precipitation hardening stainless steel has very high. With appropriate “aging” of heat treatment, in the form of very fine particles in the matrix, excellent strength of steel. The steel can process complex shape products but need to have good tolerance before an aging treatment.