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Cast Iron

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

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 More…

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. $$$

Waukesha, WI  |  800-544-4800

American Iron & Alloys Corporation is a leading manufacturer of gray iron castings and ductile iron castings. Our Versa-Bar® brand of castings comes in various sizes and shapes and can be custom cast. We provide a wide variety of industries with quality cost-efficient castings.

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American Iron & Alloys Corporation $$$

Clarksville, TN  |  931-647-1538

Clarksville Foundry specializes in manufacturing short-run, top-quality castings using a range of materials. Some of our casting capabilities include ductile iron castings and alloy castings. With over 150 years of experience, expect nothing but high-quality products and outstanding service.

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Clarksville Foundry, 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. $$$

Salem, OH  |  330-332-1566

In need of alloy castings, carbon steel castings, ductile iron castings or gray iron castings? We invite you to use our ISO 9001:2000-certified company. Thus far, we have produced product for many industries: agricultural; bridge and crane; drilling and mining; fittings; glass; tool and die; tire; valves.

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Quaker City Castings, Inc. $$$

New Liskeard, ON  |  705-647-4383

Wabi leads the industry in manufacturing loading and conveying systems, and general and abrasion-resistant castings to satisfy industrial and OEM requirements. Our company has an on-site fabrication facility, foundry and machine shop, which enables us to have control over the entire manufacturing process so we ship products of the highest quality. To learn more about our capabilities, contact Wabi today!

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Wabi Iron & Steel Corp. $$$
placeholder image Seneca Foundry, Inc. American Iron & Alloys Corporation Clarksville Foundry, Inc. Impro Industries USA, Inc. Quaker City Castings, Inc. Wabi Iron & Steel Corp.

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