Hyundai and Kia are building a Louisiana steel mill for their own cars.

Hyundai Motor and Kia build cars in the United States. The sheet that goes into those cars still mostly comes from somewhere else. On Sept. 4, 2026, Hyundai Steel, the group’s steelmaker, held a ceremonial event in Ascension Parish, Louisiana, for a mill meant to change that. The plant will be run by HYUNDAI-POSCO Louisiana Steel, a joint venture of Hyundai Steel, POSCO, Hyundai Motor, and Kia. Hyundai Steel’s own network lists the site at 8579 Highway 405 in Donaldsonville.

The company called it a $5.8 billion electric-arc-furnace mill, and the first of its kind in North America for Hyundai Steel. An electric-arc furnace melts scrap with electricity rather than a blast furnace and coke. Hyundai Steel said the mill will be able to roll 2.7 million metric tons of hot-rolled and cold-rolled sheet a year, primarily for automotive use, and that the steel will go to global automakers including Hyundai Motor and Kia. Commercial production is targeted for 2029. The furnace is not pouring steel. Sept. 4 was a ceremony.

The jobs number attached to the mill is 5,400, of which 1,300 are direct positions at the plant. The rest are the jobs Hyundai Steel expects around it. The mill sits inside a larger Hyundai Motor Group promise. In August 2025 the group said it would invest $26 billion in the United States from 2025 through 2028, five billion of that added to a $21 billion plan announced the previous March. The same 2025 note said the group employs about 250,000 people worldwide and expects the U.S. program to add about 25,000 direct American jobs by 2028, including a robotics hub sized for 30,000 units a year. The Louisiana mill is one piece of that commitment, not the whole of it. Since the group entered the U.S. market in 1986, it says it has invested more than $20.5 billion.

“As America strengthens its manufacturing leadership, steel will continue to power the next chapter of its industrial resurgence,” said Euisun Chung, executive chair of Hyundai Motor Group, at the Louisiana event. The release does not split the mill’s ownership among the four partners, and it does not say how many of the 2.7 million tons are reserved for Hyundai and Kia cars.