(i) Steel products need to be galvanised to make them rust free. This is done by galvanising iron with chromium, nickel and tungsten.
(ii) Besides iron, manganese is a very important raw material in the steel manufacture process as manganese is used for hardening of steel and also for removing impurities.
(iii) Mini-steel plants are located far from iron-ore deposits because mini steel plants use scrap iron from integrated steel plants, so they need not be located near the source of raw material.