Explanatory notes
… the oxide ores, pyrolusite, braunite and manganite. It is also obtained by electrolysis. The metal itself, which is … silico‑manganese and certain alloy cast irons and alloy steels; these products normally fall in Chapter 72, but … is very low (see Note 1 (c) to Chapter 72). Manganese is also alloyed with copper, nickel, aluminium, etc. …