Development and trial production of HSL450S round billet for submarine pipe

The composition design of HSL450S steel for submarine pipe is introduced in this paper.The EAF-LF-VD-CC process was firstly used in the trial production of HSL450S in Hengyang Steel Tube(Group) Co.Ltd.Through controlling the final composition of molten steel in EAF,smooth smelting operation was ensured.During the trial production period,the composition and temperature of HSL450S were in good control,calcium treatment and argon rinsing were full executed and no nodulation was formed on the casting nozzle.