Gray iron is the most common cast iron material and is the most frequently utilized cast material. Read More…
Leading Manufacturers
Modern Aluminum Castings Co., Inc.
Terre Haute, IN | 800-467-6252Modern 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.

Pittsburgh Foundry & Machine Co.
Pittsburgh, PA | 412-682-0130For more than 100 years, Pittsburgh Foundry and Machine Company has been the leading manufacturer of ferrous and nonferrous castings. Our values have stayed the same for the last 100 years, providing high-quality products with high-quality customer service. We want to meet our customer's needs and build long-lasting relationships.

Fountain Foundry Corp.
Veedersburg, IN | 765-294-2244Since 1943, Fountain Foundry Corporation has specialized in highly cored and intricate castings. Our in-house pattern shop can transform your design into a high quality ductile or grey iron casting. We have a 77,000 square foot facility and can handle the most complex cores. To do the job right, we also offer finishing operations such as heat treating, grinding, polishing, machining and coating.

Impro Industries USA, Inc.
Diamond Bar, CA | 877-484-6776Impro 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.

Waupaca Foundry, Inc.
Waupaca, WI | 715-258-6611Waupaca is a TS-16949, ISO 14001, and OHSAS 18001 certified producer of gray, ductile and compacted graphite iron castings melting over 9,500 tons per day. These castings are produced using vertical, high pressure, greensand molding at all of our facilities utilizing several different mold sizes to optimize the production of castings ranging from 2 pounds (1Kg) to 350 pounds (160 Kg).

Northern Iron & Machine
St. Paul, MN | 651-778-3300Northern Iron & Machine for finished castings ready for installation. Ductile grey iron and Austempered ductile castings, small to large quantities. Prototypes up to 500 lbs. and castings up to 250 lbs. Machining, painting, assembly. ISO 9001:2000 certified. In-house metallurgical lab. Industries: OEM, Oil-Field, Off-Highway, Agriculture, Fire Fighting, Locomotive, Wind.

Gray Iron Castings Manufacturers List
Gray iron was the original cast iron, although it has recently been replaced in many applications by other iron-carbon alloys with a stronger tensile strength. This material obviously contains iron, but is distinguished from other iron materials by the presence of carbon and silicon. Gray iron is cast much like any other metal; it is poured into a mold and extracted after it cools.
There are several different casting methods through which gray iron is molded, including green sand molding, shell molding, and centrifugal molding. The method by which the gray iron is cast can have varying effects on the mechanical properties of the metal, especially in respect to its cooling rate.
Additionally, the composition of the material can also provide different advantages and disadvantages. The presence of graphite makes the material easy to machine and provides great wear resistance. The material is also relatively inexpensive to create which makes the material a common choice for all kinds of engineering applications.
Gray iron castings are widely used in the automotive, appliance, agricultural, and machinery industries. Gray iron can be found in pump housings, electrical boxes, engine blocks, and decorative castings.