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.

Leading Manufacturers

Portsmouth, OH  |  740-354-3183

Osco Industries, an ISO 9002-certified company, is a supplier of Gray Iron Castings. Up to 50 lbs. High & low volume. Greensand & shell molding. We have Disamatic, Osborne & Hunter molding lines. Serving A/C and Ref., automatic, pump, heavy truck & many more industries. We invite you to take a closer look and discover a company that is one of the leaders in the casting industry. Contact us today!

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OSCO Industries, Inc. $$$

West Salisbury, PA  |  814-662-2809

West Salisbury Foundry & Machine specializes in gray iron castings, alloy castings, ductile iron castings, white iron castings & ni-hard castings. Since 1884, we have served diverse markets such as printing, railroad, foundry equipment, steel mill, electrical, electrical, mining, the stoker industry & others. We serve industries such as pumps, compressors, machine tool, oil field equipment & more.

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West Salisbury Foundry and Machine Company $$$

Fontana, CA  |  909-428-0114

Commercial Casting specializes in gray iron castings and ductile iron castings. We provide top-quality castings for a wide range of industries, including aerospace, tool and die, construction, gas compression, machine tool, power generation, ship building, specialty equipment and water pumping.

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Commercial Casting Company $$$

Richmond, VA  |  804-233-9674

OK Foundry offers highly flexible gray and ductile iron castings. Family owned since 1912, we ensure tightly controlled metallurgy for production, prototype & one-of-a-kind engineering & architectural castings up to 700 lbs. Whether you need a handful of castings or regular shipments of large quantities, we offer shorter lead times & cheaper tooling. Your domestic partner for gray or ductile iron parts.

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O.K. Foundry Company, Inc. $$$

Manheim, PA  |  717-898-2210

Since 1980, Bearon has been a top provider of grey iron castings and other components. Bearon components are crafted from aluminum, brass, bronze, cast iron, ductile iron and malleable iron to suit a range of industrial applications. With manufacturing capabilities including casting, machining, fabrication, finishing, molding and more, Bearon can take care of your projects from start to finish.

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Bearon Manufacturing, LLC $$$
placeholder image OSCO Industries, Inc. West Salisbury Foundry and Machine Company Commercial Casting Company O.K. Foundry Company, Inc. Bearon Manufacturing, LLC

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