Metal Castings, Columbiana Foundry specializes in both steel and iron castings. You can rely on us for the best commercial castings available in both steel and iron castings; Producer of Gray, Alloy & Ductile Iron Castings & Carbon, Alloy, Stainless & Tool Steels; Patented Nobake Sodium Silicate Process Is Used to Produce Castings in Prototype, Low & Medium Quantity Production Runs; Steel Castings From 10 Lbs; to 7500 Lbs; Gray & Ductile Iron Castings From 10 Lbs; to 5,000 Lbs; Quality Control Process Includes Inquiry ...