WASHINGTON, June 30 -- MM Metals USA, Fairless Hills, Pennsylvania, has submitted comments to the U.S. Department of Commerce Bureau of Industry and Security, urging the agency to recognize ultrapure low-carbon ferrochrome and high-purity aluminum as vital to national security. The company's input supports the ongoing Section 232 investigation into processed critical minerals and derivative products, advocating for measures to reduce reliance on foreign sources. The U.S. currently imports 100%  more ST