Lukens Steel Company, located in Coatesville, Pennsylvania, is the oldest iron mill in commission within the United States.
In 1995, it was one of the three largest producers of plate steel and the largest domestic manufacturer of alloy-plate. It is ranked fourth out of 24 public steel corporations in profitability, earning 14.8% equity five years in a row. The company produces carbon, alloy, and clad steel plates along with stainless steel sheets, strips, plates, hot bands, and slabs.