sentences:  It has corporate offices in Monclova, Coahuila, in the center of the Mexican state of Coahuila, 155 miles from the United States border.Teódulo Flores Calderon donated the land to AHMSA, later Harold Rudolph Pape found Altos Hornos de Mexico in 1942 in Monclova, Coahuila for its proximity to the border, with the mines of iron located in the same state and Chihuahua, as well as with coal, located in the carboniferous region of Coahuila.Between 1944 and 1948, the production increased from 40,000 to 100,000 tons of liquid steel per year.