The steel GCrl5 is produced by hot metal pretreatment-120 t top and bottom combined blown converter-LF- VD-0180 mm CC process. The statistical data for effect of converter end [C
]
on oxygen activity in liquid
effect of LF refining slag basicity on T[O
]
and effect of aluminium content in steel at end of LF refining period on aluminium loss and T[O
]
in VD process are analyzed. With controlling converter end [C