Degassing method for manufacturing ultra-low carbon, nitrogen, sulfur steel

A method of making low carbon steel, comprising:

• tapping the liquid steel out of a primary steelmaking furnace;
• deoxidizing the liquid steel producing killed steel;
• transferring the killed deoxidized liquid steel to a ladle metallurgy furnace;
• removing sulfur from the killed deoxidized liquid steel at the ladle metallurgy furnace;
• adding fluxes and arcing the killed deoxidized liquid steel to prevent sulfur reversion;
• and
• transferring the killed deoxidized liquid steel from the ladle metallurgy furnace to an RH degasser for carbon removal to produce decarburized liquid steel comprising 0.003 weight percent or less carbon, wherein the removal of oxygen and sulfur prior to transferring the liquid steel to the RH degasser facilitates nitrogen removal and prevents carbon pick up during the step of removing sulfur.