Ferrolegeringer (ekskl. ferromangan, ferrosilicium, ferrosiliciummangan, ferrochrom, ferrosilicochrom, ferronikkel, ferromolybdæn, ferrowolfram, ferrosilicowolfram, ferro titanium, ferrosilicotitanium, ferrovanadium, ferroniobium, ferrophosphor og ferrosilicomagnesium)