S31603 refers to a kind of stainless steel.
S31603 is an ultra-low carbon steel based on 316 with reduced carbon content. It has good corrosion resistance to various organic acids, inorganic acids, alkalis and salts, and has good resistance to sensitized intergranular corrosion. It has good welding performance and is suitable for multi-layer welding. No heat treatment is required after welding, and there is no tendency of knife edge corrosion after welding.
S31603 chemical composition, carbon C is ≤0.030, silicon Si is ≤1.00, manganese Mn is ≤2.00, phosphorus P is ≤0.045, sulfur S is ≤0.030, chromium Cr is 16.00~18.00, nickel Ni It is 10.00~14.00, and molybdenum Mo is 2.00~3.00S31603.
Introduction to Stainless Steel
Stainless Steel is the abbreviation of stainless acid-resistant steel. Steel types that are resistant to weak corrosive media such as air, steam, and water or are stainless are called stainless steel. , and steel types that are resistant to chemical corrosion media (chemical corrosion such as acids, alkali, salts, etc.) are called acid-resistant steel.
Due to the difference in chemical composition between the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to corrosion by chemical media, while acid-resistant steel is generally stainless. The word "stainless steel" does not simply refer to one kind of stainless steel, but refers to more than one hundred industrial stainless steels, each of which is developed to have good performance in its specific application field.
The key to success is to first understand the purpose and then determine the correct steel type. There are usually only six types of steel related to building construction applications. They all contain 17 to 22% chromium, and the better steel types also contain nickel. Adding molybdenum can further improve the atmospheric corrosion resistance, especially the corrosion resistance of chloride-containing atmosphere.
Reference for the above content: Baidu Encyclopedia—Stainless Steel