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Cast Iron

A reliable source for Grey Iron Castings information and leading Grey Iron Castings Companies & Manufacturers.

While there are several specific casting techniques in use to produce cast iron parts, all follow this basic procedure of heating, molding, cooling and ejecting. Read Moreā€¦

Cast Iron Cast iron encompasses a large group of ferrous alloys containing between 1 and 3 % silicone and 2 to 4% carbon with a core of about 95% iron by weight.
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Leading Manufacturers

Webster City, IA  |  515-832-1722

Seneca Foundry is a manufacturer of gray and ductile iron castings, ranging in size from ounces to 250 pounds. Our customer base is from a wide range of industries, such as agriculture, industrial, cookware and more. We offer a variety of molding processes including green sand, lost foam, and no-bake. Our versatility enables us to give the customer the best solution for their casting needs. Contact us today to get started!

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Seneca Foundry, Inc. $$$

Kohler, WI  |  920-226-5496

At Kohler Industrial Castings, We have the capacity and process flexibility to offer a variety of iron grades, such as gray iron, four grades of ductile iron, and five grades of austempered ductile iron. Staffed with skilled craftsmen, our team works to seek out product improvements and cost savings for production and sand cast products. We maintain a single level of quality in everything we do. We are one of the industry leaders in quality, customer service and on-time delivery.

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Kohler Industrial Castings $$$

La Crosse, WI  |  608-781-0600

Torrance Casting produces highly engineered, close-tolerance castings such as gray iron castings, ductile iron castings and Ni-hard castings. We manufacture air conditioning unit headers, engine and motor housings, fire hydrant parts, flywheels, pistons and power transmission parts.

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Torrance Casting, Inc. $$$

Diamond Bar, CA  |  877-484-6776

Impro Industries is globally recognized as a leading provider of high-precision, high-complexity, and mission-critical casting and machined components. Industries served include automotive, aerospace, medical, and many mor. Our team is dedicated to the quality of our every project, ensuring the highest customer satisfaction. Contact us today to learn more about our grey iron casting capabilities.

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Impro Industries USA, Inc. $$$

Sandusky, OH  |  419-357-1015

Precision Cast and Forge aims to be a leading manufacturer for domestic and offshore high quality and affordably priced finished castings, forgings, and machined parts. Our expertise in fluid power casting design and manufacturing enables us to add value to our customers and principles. Contact us today and make us your number one source for castings, forgings, and machined components.

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Precision Cast and Forge $$$

Canton, OH  |  330-452-9711

U.S. Casting Company specializes in alloy castings and carbon steel castings. We are well known for our attention to detail and insistence on the highest quality in equipment and materials, as well as our commitment to testing and quality control. We are proud to serve a diverse array of industries and a wide variety of companies, both domestic and international.

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U.S. Casting Company $$$

Jacksboro, TN  |  423-562-2701

Clinch River Casting, Inc. is an American manufacturer of high-quality low to medium-run iron castings. We help our customers find solutions to their casting needs by focusing on personal attention, producing quality products, and prompt delivery. Every client has unique requirements which we can only meet by listening to them and working together. We succeed when our customers achieve their goals.

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Clinch River Casting $$$
placeholder image Seneca Foundry, Inc. Kohler Industrial Castings Torrance Casting, Inc. Impro Industries USA, Inc. Precision Cast and Forge U.S. Casting Company Clinch River Casting

There are two predominant types of cast iron, those being grey iron and white iron. The former has a graphitic structure, the deflection of which provides the namesake color on fracture surfaces. White iron, however, has small white deposits of cementite rather than being completely pallid. The main differences between the two are silicone content and cooling times, both of which have a significant impact on the physical and mechanical behavior of the alloy.

White iron has a low carbon content and is cooled at a fast rate to produce a brittle cast part with good hardness and abrasion resistance. These are used in a number of wear applications such as slurry pumps, liners, grinding mills and pulverizers. Grey iron castings on the other hand are produced through the slow cooling of high carbon iron alloys and are less brittle allowing their use as crankshafts, support beams, engine blocks and more.

In addition to these two types, iron foundries and metallurgical engineers continue to develop more malleable and ductile irons that exhibit the beneficial characteristics of cast iron, but with significant reductions to brittleness due to a spheroid rather than flaked internal structure. These specialized alloys are becoming increasingly common in the industrial world.

Although pure iron is found only in meteorites, the element is one of the most abundant on Earth making up 5% of the crust and 35% of the total mass. Mining operations extract the element from iron ore and oxides such as magnetite, hematite, limonite, goethite and siderite which contain high levels of iron. These oxides are smelted to produce what is known as pig iron, the base material for cast iron.

The stock forms are heated in a special blast furnace known as a cupola. Scrap iron and steel are added to the molten mixture to produce cast iron. Once in a molten state this metal is poured into a cast where it is cooled at controlled rates before a finished or near finished part is ejected or extracted. Some of the more popular methods used today for iron castings are die casting, centrifugal casting and sand casting.

Die casting is used to manufacture complex parts at high production rates, centrifugal casting creates cylindrical parts and sand casting uses expendable synthetic or natural sand molds to create rough parts. These processes result in easily machined cast iron components with high compression strength, low melting points, good thermal conductivity and energy dissipation, wear resistance and fluidity.

Cast Iron Informational Video