Liquefied petroleum gas (LPG) cylinder is a national secondary pressure vessel, so the performance requirements of HP295 steel plate used to manufacture this cylinder are very strict. In the design of chemical composition, in addition to ensuring certain strength and plasticity of HP295 steel plate, it is also considered that HP295 steel plate has good cold stamping and welding performance, and the composition of HP295 hot-rolled steel plate mainly depends on five main elements of steel C, s, Mn, P, s and Microalloy Elements.
In the composition design, the weldability of HP295 steel plate is considered, the carbon content in HP295 steel plate is properly reduced, the fluctuation range of carbon content between different heats is precisely controlled, the silicon content is strictly controlled, and Ti is added to stabilize the performance and improve the weldability of HP295 steel plate.
