Stainless steel
Stainless acid-resistant steel is referred to as stainless steel. It is composed of stainless steel and acid-resistant steel. In short, steel that can resist atmospheric corrosion is called stainless steel, while steel that can resist corrosion by chemical media (such as acids) is called acid-resistant steel. Generally speaking, steel with a chromium content of more than 12% has the characteristics of stainless steel; stainless steel can be divided into five categories according to its microstructure after heat treatment: ferritic stainless steel, martensitic stainless steel, austenitic stainless steel Stainless steel, austenitic-ferritic stainless steel and precipitation hardened stainless steel.
shipbuilding steel
Shipbuilding steel refers to the steel used to manufacture sea-going ships and large inland river hull structures. Since the hull structure is generally manufactured by welding, shipbuilding steel is required to have good welding performance. In addition, it is also required to have certain strength, toughness and certain low temperature and corrosion resistance. In the past, low carbon steel was mainly used as shipbuilding steel. Recently, ordinary low alloy steel has been widely used, and existing steel types include 12 manganese ships, 16 manganese ships, 15 manganese vanadium ships and other steel types. These steel types have comprehensive properties such as high strength, good toughness, easy processing and welding, and resistance to seawater corrosion, and can be successfully used to manufacture ocean-going ships of 10,000 tons.
