Boiler Steel Plate
Boiler Steel Plate is a kind of special steel plate which is used primarily for boiler material and pressure vessels designed for elevated temperature and pressure. Boiler steel plate can withstand high temperatures and pressure. It is used for boiler and pressure vessels such as petroleum, chemical industry, power plants and boilers to protect against corrosion, high temperature, seismic and static loads.
Boiler steel plates are typically made of carbon steel, alloy steel, or stainless steel. Carbon steel is an iron-carbon alloy that normally contains up to two percent of its mass in carbon content. The addition of alloying elements such as chromium, nickel, manganese, and molybdenum produces steel with improved corrosion resistance, tensile strength, and fabrication capabilities. Stainless steel is an alloy of iron with a minimum of 10.5% chromium. It typically contains up to 30% chromium, which provides good corrosion resistance and strong cold forming capabilities.
Boiler steel plates must also be able to tolerate high temperatures. High temperature service requires high strength steels that are able to resist creep and hot cracking. Creep is the tendency of a material to slowly deform at elevated temperatures. Hot cracks are small cracks that appear due to the rapid cooling of a hot material as it transitions from a liquid to a solid state. In order to resist these high temperature forces, the temperature range of a boiler steel plate should never exceed 650℃.
The chemical composition of the boiler steel plate affects its properties. For example, carbon, manganese, silicon, and molybdenum can contribute to increased tensile strength and improved corrosion resistance. Alloys such as chromium and nickel provide improved oxidation resistance and improved toughness. Most boiler steel plates are made according to a standard. The most common standards include ASTM A515, ASTM A387, ASTM A516, and ASTM A285.
When selecting a boiler steel plate it is important to consider the application and fabrication requirements. For components that operate at high temperatures and pressures, the plate must feature good creep strength, strength at elevated temperatures, corrosion resistance, and excellent weldability. For components that are to be welded or formed, the plate must be able to withstand high temperatures without hot cracking, and must also be ductile and malleable.
Boiler steel plate is an important material for industries that require high temperature and pressure components, such as boilers and pressure vessels. It is also a key material for other applications such as military vehicles and civilian transportation. The material is made of a variety of grades which determine properties such as resistance to corrosion and weathering, quality of welding and fabrication, and temperature range of service. Selection of the appropriate grade and material must be made with careful consideration of the application and design requirements.
