During the twentieth century, the US sector successively adopted the open hearth furnace, then the basic oxygen steelmaking method. Because the American sector peaked from the forties and nineteen fifties, the US market has shifted to modest mini-mills and specialty mills, employing iron and steel scrap as feedstock, as an https://www.kooapp.com/koo/guest_DENCMG/5525e6c9-9101-4225-895b-c857532c2260