What is killed steel plates?
Killed steel plates is made of common carbon structural steel hot - rolled steel plate. Killed steel is deoxygenated completely, liquid steel before pouring with ferromangmanganese, ferrosilicon and aluminum for full deoxygenation, liquid steel oxygen content is low (generally 0.002-0.003%), liquid steel in the ingot mold is calm, do not produce boiling phenomenon, killed steel from this name. Under normal operating conditions, there are no bubbles in the killed steel, and the structure is uniform and compact. Due to the low oxygen content, the oxide inclusions in the steel are less, the purity is higher, and the cold brittleness and aging tendency are small. At the same time, the killed steel has smaller segregation, more uniform performance and higher quality. The disadvantages of killed steel are concentrated shrinkage hole, low yield and high price. Therefore, killed steel is mainly used in low temperature bearing impact components, welding structures and other components requiring higher strength.
Low alloy steel plates is killed steel and semi - killed steel plates. Because of high strength, superior performance, can save a lot of steel, reduce the weight of the structure, its application has been more and more widely.