Welcome to United Steel Supply, your first choice for high quality flat rolled steel coils. Our superior customer service provided by our dedicated employees gives you the opportunity to order what you need and leave the rest to us. United Steel Supply offers competitive pricing and just-in-time delivery, allowing us to achieve the highest level of customer satisfaction. United Steel Supply furnishes Galvalume®, galvanized and prepainted steel coils for metal roofing and siding applications to the agricultural, commercial, industrial and residential markets, both domestically and for export.