An experiment of continuous casting with ultra-high frequency electromagnetic field was carried out at
No. 4 commercial caster at Kobe Works. It was confirmed that the durability of a slit mould was
sufficient for long casting, and meniscus level was controlled precisely enough for stable casting by
the level control technology using the inductance change in the magnetic system. The improvement
of billet surface quality and the lubrication between the mould and the solidified shell are discussed.