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Production process

Production process
NLMK Indiana produces high quality liquid steel in an electric furnace and hot rolls the continuously cast slabs on a 60 in. hot strip mill. The EAF Melt Shop is capable of producing 770 thousand metric tons of liquid steel annually. The Hot Strip Mill is capable of producing 1.2 million metric tons of hot rolled coils annually.

The Hot Strip Mill can produce hot rolled coils over a width range of 37.37 in. through 60.50 in. in a gauge range of 0.071 in. through 0.763 in. Nominal coil PIW can be produced in accordance with customer requirements, but maximum PIW peaks at 1,050. NLMK Indiana also offers discrete plate from 1 in. through 6 in.

770k
metric tons of liquid steel annually

Because NLMK Indiana operates a fixed mold continuous caster, highly consistent coil weights result from an unchanging slab width and precision cut slab lengths. The fixed widths and lengths are defined as ‘Dimensional Classes’ and each is designed to produce a specific coil weight / PIW range coming off of the hot strip mill. See your Inside Sales Representative for a table of available Dimensional Classes.

EAF Melt Shop

NLMK Indiana operates an electric arc furnace capable of producing 770 thousand metric tons of liquid steel annually. Buckets of scrap, prepared to designate a specific grade, are lowered into the furnace. A roof is lowered over the furnace and then electrodes are lowered to strike an arc and begin melting. When the steel has reached its desired composition and temperature in the furnace, after refining and de-slagging to remove unwanted elements and impurities, the furnace is tapped. Steel is sent to the caster to make 8.07 in. thick slabs, 39-60 in. wide.

Hot Rolled Production

Slabs from our EAF as well as slabs purchased from market are heated and rolled to a desired thickness between 0.071-0.763 in. and 37.37-60.5 in wide. After passing through our 5-stand 4-high finishing mill, steel coils are ready to ship to our consumers or downstream to our facilities in Pennsylvania.