El Boiler steels It is mainly made of specially hot-rolled, low-alloy carbon steel. This type of boiler steel is manufactured for the most important parts of the boilers such as: the boiler casing, the drum, the head cover and the hanger. Boiler steel plate material is usually medium / thick and has to be very heat resistant.
Boilers, in addition to being subjected to very high temperatures and pressures, are also subject to impacts, corrosion from water or gas, and fatigue loads. Therefore, boiler steel must have good mechanical and processability properties and strictly comply with technical regulations.
Two types of materials are commonly used: special carbon steel and low-alloy heat-resistant steel. It is worth mentioning that they must have strict control over the chemical composition of harmful elements such as sulfur and phosphorus and as well as residual elements such as chromium, nickel and copper.
According to the different working conditions, the steel plates of the boiler can be divided into two categories: