Steel mill in the context of "Ironworks"

Košice is the largest city in eastern Slovakia. It is situated on the river Hornád at the eastern reaches of the Slovak Ore Mountains, near the border with Hungary and Ukraine. With a population of approximately 230,000, Košice is the second-largest city in Slovakia, after the capital Bratislava.

Being the economic and cultural centre of eastern Slovakia, Košice is the seat of the Košice Region and Košice Self-governing Region, it belongs to the Košice-Prešov agglomeration, and is home to the Slovak Constitutional Court, three universities, various dioceses, and many museums, galleries, and theatres. In 2013, Košice was the European Capital of Culture, together with Marseille, France. Košice is an important industrial centre of Slovakia, and the U.S. Steel Košice steel mill is the largest employer in the city. The town has extensive railway connections and an international airport.

Katowice (/ˌkɑtəˈvitsə/, Polish: [katɔˈvit͡sɛ] , Silesian: Katowice, German: Kattowitz) is the capital city of the Silesian Voivodeship in southern Poland and the central city of the Katowice urban area. As of 2021, Katowice has an official population of 286,960, and a resident population estimate of around 315,000. Katowice is a central part of the Metropolis GZM, with a population of 2.3 million, and a part of a larger Katowice–Ostrava metropolitan area that extends into the Czech Republic and has a population of around 5 million people, making it one of the most populous metropolitan areas in the European Union.

Katowice was founded as a village in the 16th century, whereas several modern districts of Katowice were founded as villages in the Middle Ages. Throughout the mid-18th century, Katowice grew following the discovery of rich coal reserves in the area. In the first half of the 19th century, intensive industrialization transformed local mills and farms into industrial steelworks, mines, foundries and artisan workshops. The city has since reshaped its economy from a heavy industry-based one to professional services, education and healthcare. The entire metropolitan area is the 16th most economically powerful city by GDP in the European Union with an output amounting to $114.5 billion. Katowice Special Economic Zone is ranked fourth on the list of the TOP10 Global Free Zones.

In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness, to make the thickness uniform, and/or to impart a desired mechanical property. The concept is similar to the rolling of dough. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, and cold rolling processes the most tonnage out of all cold working processes. Roll stands holding pairs of rolls are grouped together into rolling mills that can quickly process metal, typically steel, into products such as structural steel (I-beams, angle stock, channel stock), bar stock, and rails. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products.

There are many types of rolling processes, including ring rolling, roll bending, roll forming, profile rolling, and controlled rolling.

Gary is a city in Lake County, Indiana, United States. The population was 69,093 at the 2020 census, making it Indiana's eleventh-most populous city. The city has been historically dominated by major industrial activity and is home to U.S. Steel's Gary Works, the largest steel mill complex in North America.

Gary is located along the southern shore of Lake Michigan about 25 miles (40 km) southeast of downtown Chicago. The city is the western gateway to the Indiana Dunes National Park, and is within the Chicago metropolitan area.

Gliwice (Polish: [ɡliˈvit͡sɛ] ; Silesian: Glywice, Czech: Hlivice; German: Gleiwitz) is a city in Upper Silesia, in southern Poland. The city is located in the Silesian Highlands, on the Kłodnica river (a tributary of the Oder). It lies approximately 25 km (16 mi) west from Katowice, the regional capital of the Silesian Voivodeship.

Gliwice is the westernmost city of the Metropolis GZM, a conurbation of 2.0 million people, and is the third-largest city of this area, with 175,102 permanent residents as of 2021. It also lies within the larger Katowice-Ostrava metropolitan area which has a population of about 5.3 million people and spans across most of eastern Upper Silesia, western Lesser Poland and the Moravian-Silesian Region in the Czech Republic. Gliwice is bordered by three other cities and towns of the metropolitan area: Zabrze, Knurów and Pyskowice. It is one of the major college towns in Poland, thanks to the Silesian University of Technology, which was founded in 1945 by academics of Lwów University of Technology. Over 20,000 people study in Gliwice. Gliwice is an important industrial center of Poland. Following an economic transformation in the 1990s, Gliwice shifted from steelworks and coal mining to automotive and machine industry.

Steelmaking is the process of producing steel from iron ore and/or scrap. Steel has been made for millennia, and was commercialized on a massive scale in the 1850s and 1860s, using the Bessemer and Siemens-Martin processes.

Currently, two major commercial processes are used. Basic oxygen steelmaking (BOS) uses liquid pig-iron from a blast furnace and scrap steel as the main feed materials. Electric arc furnace (EAF) steelmaking uses scrap steel or direct reduced iron (DRI). Oxygen steelmaking has become more popular over time.