A continuous casting machine that solidifies molten metal into billets or slabs falls under 845430 as a casting machine for metallurgy. A press that subsequently shapes solid metal by forging or bending belongs in a different heading covering metal-working presses. The key distinction is whether the machine is acting on molten or semi-solid metal (casting) versus already-solid metal (forming).

Parts specifically designed for converters, ladles, ingot molds, and casting machines of this heading are classified under 845490. General-purpose components that are not identifiable as parts of these specific machines may fall under broader machinery-parts provisions; a binding ruling can resolve ambiguous cases.