Series 400 stainless steel is a ferritic and martensitic stainless steel whose main components are chromium, carbon, and a small amount of other elements. Compared to 300 series stainless steels, 400 series stainless steels contain no or very little nickel elements, so they differ in terms of cost and corrosion resistance. Below will be an introduction to some common 400 series stainless steel grades and their characteristics.
1.403 stainless steel.
403 stainless steel is a ferritic stainless steel containing 16-18% chromium element, which has good corrosion resistance and oxidation resistance. It is suitable for applications that require low corrosion resistance, such as construction, furniture, kitchenware, etc. However, due to its low strength, it is not suitable for use in applications that need to withstand high loads and stresses.
2.409 stainless steel.
409 stainless steel is a ferritic stainless steel containing 11-13% chromium elements, which has good corrosion resistance and high temperature oxidation resistance. It is commonly used in high-temperature environments such as automotive exhaust systems, stoves, heat exchangers, and other components. In addition, 409 stainless steel also has good formability and weldability, which is convenient for processing and manufacturing.
3.410 stainless steel.
410 stainless steel is a martensitic stainless steel that contains 115-13.5% chromium element. It has high strength and good wear resistance, and is suitable for manufacturing parts such as knives, cutting tools, bearings, etc., which need to withstand high loads and high wear. However, 410 stainless steel has poor corrosion resistance and requires surface treatment or coating treatment to improve its corrosion resistance.
4.420 stainless steel.
420 stainless steel is also a martensitic stainless steel that contains 12-14% chromium elements. It has high hardness, high strength, and good wear resistance, and is suitable for manufacturing tools that require high hardness and high wear resistance, such as scalpels, scissors, blades, etc. Similar to 410 stainless steel, 420 stainless steel is also less resistant to corrosion and requires surface treatment or coating.
5.430 stainless steel.
430 stainless steel is a ferritic stainless steel that contains 16-18% chromium. It has good corrosion resistance and formability, and is suitable for the manufacture of kitchen utensils, tableware, washing machine inner barrels and other parts that need to withstand corrosion and wear. In addition, 430 stainless steel also has good heat resistance and low temperature resistance, which is suitable for some applications in special environments.
In addition to the above common 400 series stainless steel grades, there are some other grades, such as etc., each of which has different characteristics and application scenarios.
In general, 400 series stainless steels have different compositions, microstructures and performance characteristics, which are suitable for different application scenarios. When choosing to use 400 series stainless steel, it is necessary to select the appropriate grade according to the specific use environment and requirements, and apply the appropriate surface treatment or coating treatment to improve its corrosion resistance. At the same time, it is also necessary to pay attention to some problems in the processing and manufacturing process of 400 series stainless steel, such as heat treatment, welding, etc., to ensure its performance and service life.