The US steel industry has existed since the 19th century and consolidated in the early 20th century with the formation of large companies. Protectionist policies were implemented during the 1930s and 1940s, including price fixing and tariffs. The industry transitioned from open hearth furnaces to more efficient basic oxygen and electric arc furnaces. In the late 20th century, the industry faced increased global competition and overcapacity. In the early 2000s, the US government imposed section 201 tariffs on steel imports to protect domestic producers, but this was ruled to violate international trade rules by the WTO. The tariffs were eventually lifted to avoid a trade war, despite domestic criticism. The US steel industry continues to face challenges from rising