Profile: Deep Steel Alloys is an importer, trader and supplier of stainless steel, high nickel steel, alloy Steel, carbon steel in form of pipe, fittings, flanges, fasteners, plate, round bar, wire, and coils. Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. Alloy 904L Stainless Steel Plate is easily welded and processed by standard shop fabrication practices. Deep Steel center has a wide range of 904L Plates which has a good resistance to pitting and crevice corrosion, very good resistance to stress corrosion cracking, good resistance to intergranual corrosion, good formability and weldability.