Heat-resistant steel is a type of steel that is resistant to high temperatures and can withstand temperatures more than 600 degrees Celsius. It has a wide range of uses, from automotive and aerospace industries to power plants, petrochemicals and nuclear reactors. Heat-resistant steel can be divided into several categories depending on its application.
1. High-temperature alloy steel: This type of heat-resistant steel is suitable for high temperature applications such as heat exchangers, boilers, and gas turbines. The most common grades of high-temperature steel include AISI grades 310, 314, 316, 321 and 347.
2. Corrosion-resistant steel: This type of heat-resistant steel is designed to resist corrosion in aggressive environments, such as chemical processing and power plants. Highly alloyed steels, such as AISI 316 and Alloy 20, can provide excellent corrosion protection, even when exposed to highly corrosive substances such as sulfuric acid and hydrochloric acid.
3. Ferritic stainless steel: This type of heat-resistant steel is specially engineered to retain its strength and ductility even when exposed to high temperatures. It is commonly used in petrochemicals and chemical processing plants, as well as nuclear reactors and power plants. Common grades of ferritic stainless steel include AISI 409, 410, 416 and 430.
4. Heat-treatable steel: This type of heat-resistant steel is designed for heat treatment, such as welding and brazing. The main advantage of this type of steel is that it can be easily reshaped and manipulated without losing its strength or ductility. Common grades of heat-treatable steel include AISI 4130, 4140, 4340 and 8620.
5. Superalloys: This type of heat-resistant steel is highly alloyed and designed for extreme temperature environments, such as jet engines, petrochemical plants and nuclear reactor vessels. Superalloys are also used in high-load applications, such as valves and turbochargers. Common grades of superalloys include AISI 718, A286 and X-750.
Heat-resistant steel has become an important element in the modern industrial process, allowing companies to manufacture and operate in more efficient and reliable ways. Heat-resistant steel has many advantages, such as excellent strength, durability, formability and corrosion resistance. As the demand for high-quality heat-resistant steel continues to rise, manufacturers will continue to innovate and develop new grades to meet specific applications.