In the 10th Korean Standard Industrial Classification (KSIC), the steel industry is listed as “Manufacture of basic iron and steel,” including “Manufacture of basic iron, steel, and ferro-alloys,” “Manufacture of steel products by rolling, extrusion and drawing,” “Manufacture of pipes, tubes and hollow profiles, of iron or steel,” and “Manufacture of other basic iron and steel.” The location quotients for the steel industry ranked by descending order were Gwangyang-si, Pohang-si, Dangjin-si, Dong-gu in Incheon, Suncheon-si, Gunsan-si, Donhea-si, and Gangseo-gu in Busan. The shipment values for the steel industry ranked by descending order were Gyeongsangbuk-do, Jeollanam-do, Chungcheongnam-do, Gyeongsangnam-do, and Busan. The number of workers for the steel industry ranked by descending order were Gyeongsangbuk-do, Chungcheongnam-do, Gyeongsangnam-do, Gyeonggi-do, Jeollanam-do. The production costs for the steel industry ranked by descending order were Gyeongsangbuk-do, Jeollanam-do, Chungcheongnam-do, Gyeongsangnam-do, and Busan. The value added for the steel industry ranked by descending order were Gyeongsangbuk-do, Jeollanam-do, Gyeongsangnam-do, Busan, and Gyeonggi-do.

For the steel industry by classification, the highest concentrations of manufacture of basic iron, steel, and ferro-alloys are (in descending order) in Gyeongsangbuk-do, Gyeonggi-do, Gyeongsangnam-do, Chungcheongnam-do, and Incheon. The highest concentrations of manufacture of steel products by rolling, extrusion, and drawing are (in descending order) in Gyeonggi-do, Gyeongsangnam-do, Gyeongsangbuk-do, Busan, and Chungcheongnam-do. The highest concentrations of manufacture of iron or steel are (in descending order) in Gyeonggi-do, Busan, Gyeongsangnam-do, Gyeongsangbuk-do, and Chungcheongnam-do. The highest concentrations of manufacture of other basic iron and steel are (in descending order) in Gyeonggi-do, Gyeongsangnam-do, Gyeongsangbuk-do, Busan, and Incheon.