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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.
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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.

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Modern Aluminum Castings Co., Inc. $$$

South Gate, CA  |  562-928-1387

At Pacific Alloy, we are a one-stop source for casting design assistance, pattern construction, casting production and finish machining. Ever since our inception nearly 80 years ago, we have served a multitude of industries including agriculture, mining, and construction. Call or visit our website today and ask us what we can do for you.

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Pacific Alloy Castings Co., Inc. $$$

Galena, IL  |  815-777-0242

For over a century Lemfco has been a family business and leading manufacturer of high-quality grey iron castings. We pride ourselves on our extensive list of products and patterns available for our customers. Lemfco is committed to creating the best gray iron castings for our customers to fit all of their needs. Our company has changed throughout the years, but our commitment to quality never has.

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Lemfco, 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. $$$

Corsicana, TX  |  903-872-6571

Oil City Iron Works, Inc. is a jobbing shop foundry in Texas specializing in Gray and Ductile Iron Castings, with a large CNC Machine Shop, modern Pattern Shop, Heat Treatment Furnaces and a Surface Coating facility. Since 1866, we have continued to expand the diversity of our products and are dedicated to quality with our ISO 9001:2015 Certification. We guarantee that you will come away satisfied with the work we have done, since our Customers are our number one priority! How can we serve you today?

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Oil City Iron Works $$$

Huntington Beach, CA  |  714-962-1064

With over 50 years in cast iron metalworking, you can trust Mesa Castings’ expertise in grey iron, white iron, nickel-chromium alloyed & high chromium alloyed castings. The finest ductile and abrasion resistant iron castings individually engineered using the latest technology, exceeding ASTM, ASME & SAE. We combine over 100 years of experience with the finest materials to produce high quality.

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Mesa Castings, Inc. $$$
placeholder image Modern Aluminum Castings Co., Inc. Pacific Alloy Castings Co., Inc. Lemfco, Inc. Impro Industries USA, Inc. Oil City Iron Works Mesa Castings, Inc.

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.

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