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cast gray iron

Cast Gray Iron

Sioux City Foundry has been providing quality Cast Gray Iron products for over
140 years. Let our knowledge and experience save you time and money. Call 888-550-2564 for a free quote today.


Expert Iron Castings

Cast gray iron has been produced in a variety of forms for thousands of years. Physically, it is composed of graphite flakes, either ferrite, pearlite or a combination of the two. It continues to be the most recognized form of cast iron.


The metallurgy of Cast Gray Iron can be adjusted to make the product harder or softer to suit your specific application. In addition, alloy additions and secondary processes, such as annealing or heat-treating, can be used to affect the properties of the gray iron casting.


Sioux City Foundry continues to supply gray, ductile, austempered ductile and ni-hard iron castings to our customers in the industrial, engineering, decorative, architectural, government and artistic sectors. Our numerous capabilities allow us to provide expert Iron Castings to a wide variety of industry sectors.


We have the capability to pour custom castings from a few ounces to 3,000 pounds. We produce various mold sizes with green sand molding processes, utilizing Hunters, Squeezer, and Rota-Lift systems. Our experienced and knowledgeable staff, along with our modern production methods, including our own in-house metallurgical testing and heat-treating capabilities and new furnaces installed in 2009, increase production efficiency with faster melt time. Increased efficiency allows us to provide quality metal castings at competitive prices.