<h1>GST classification for pig iron and spiegeleisen designates them under Schedule Three, determining applicable tax treatment on supply.</h1> Imposition of GST on pig iron and spiegeleisen in pigs, blocks or other primary forms is governed by the goods schedule classification, which places these materials within Schedule Three and subjects supplies to the applicable GST rate; this identifies the taxable goods by physical form and allocates them to a scheduled tax treatment for indirect tax applicability.