Grey Iron Castings banner

Cast Iron

A reliable source for Cast Iron information and leading Cast Iron 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.
Request For Quote

Leading Manufacturers

Terre Haute, IN  |  800-467-6252

Modern Aluminum Castings Co., Inc. has been a designer and manufacturer of aluminum and iron castings since 1919. Industries served include the sporting goods, medical devices, industrial machinery, HVAC, automotive, electrical lighting, appliance, and construction industries. Other services include forgings, stampings, custom machined components, and others.

Request A Quote

Modern Aluminum Castings Co., Inc. $$$

Chicoutimi, QC  |  418-545-8181

As an ISO 9001:2008 certified company our customers know that they are always going to receive the highest quality products and services available! Our research and development department works around the clock in order to ensure that our products remain on the leading edge of innovations at all times because we realize that our customers rely on the most advanced grey iron castings. Visit our website today!

Request A Quote

Saguenay Foundry $$$

Benton, PA  |  570-925-6711

For nearly a century, Benton Foundry has been supplying iron castings to a variety of industries, building a reputation for consistent, high-quality castings delivered on time. Working with all types of gray iron and ductile iron, Benton provides quality components and extraordinary service at a low net cost. Put Benton’s near 100 year history to work for your most challenging casting application.

Request A Quote

Benton 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.

Request A Quote

Impro Industries USA, Inc. $$$

Cedar Grove, WI  |  920-668-8526

Willman stands for quality grey iron castings that you can count on for many years to come. As a leading manufacturer producing all types of precision components, weighing from ounces to 40,000 lbs, Willman can satisfy your demands for complex engineering solutions. Willman employs skilled workers & the most advanced equipment for economical production, giving you the quality assurance you want.

Request A Quote

Willman Industries, Inc. $$$

Ashland, PA  |  570-875-6100

Ashland Foundry & Machine Works LLC (AFMW) is a world class manufacturer of grey iron castings. We have the ability to produce castings from a few pounds to 10,000 lbs in steel and 17,000 lbs in iron grades. We utilize 7 coreless induction furnaces ranging in size from 500 lbs. to 7,500 lbs. In addition to machining, we offer hydro testing, impeller balancing and polishing. We are ISO 9001:2015 certified.

Request A Quote

Ashland Foundry and Machine Works $$$
placeholder image Modern Aluminum Castings Co., Inc. Saguenay Foundry Benton Foundry, Inc. Impro Industries USA, Inc. Willman Industries, Inc. Ashland Foundry and Machine Works

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

 
Castings & Forgings
Featured Industries