A product of the blast furnace, containing, besides iron, 78 to 82% of manganese and some silicon, phosphorus, sulphur and carbon. It is used as a deoxidizer and for the introduction of manganese into steel.

Basis 78% Mn (Scale pro rata), standard 7.5% C, 78% Mn, standard 7.5% C, medium carbon, 80% min Mn, 1.5% max C