Explanatory notes
… covers : (1) The primary materials of iron and steel metallurgy (pig iron, spiegeleisen, ferro‑alloys, ferrous … sulphur and phosphorus, derived from the ore, scrap, flux or fuel, and sometimes also other elements such as … Note 1 (a). Pig iron may be in the form of pigs, blocks, lumps, whether or not broken, or in the molten state, but …