Gray Iron Castings

Ferroloy provides high quality gray iron castings to customers all around the United States. We’re a turnkey supplier for the agriculture, construction, industrial equipment, hydraulics and valves industries. With our foundry in Wichita, Kansas, we’re able to quickly produce and supply cast iron parts to our customers.

Whether you’ve designed the part in house or you need a partner to assist with casting design, we’re able to produce your cast iron part on time and on budget. We are capable of handling all aspects of gray iron castings, from casting and machining to coating and assembly.

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Gray iron casting

Gray Iron Castings Advantages

At a high level, gray iron is preferred when seeking a low-cost, solution with strength, heat dissipation, and high density.  It has a good fluidity and is easily machined.


Gray iron derives its properties from flake graphite in its microstructure. Its unique attributes include excellent machinability. When the composition of the molten iron and its cooling rate are suitable, the carbon in the iron separates during solidification and forms interconnected graphite flakes. The graphite grows edgewise into the liquid and forms the characteristic flake shape.  The properties of gray iron also are influenced by the relative hardness of the metal matrix, which is the iron that surrounds the graphite. Microstructural properties are primarily controlled by the carbon and silicon content of the metal and the cooling rate of the casting.

Tensile and Yield Strength

Gray iron does not have a measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi.

Gray iron microstructure

Damping Capacity

The relative ability of a material to absorb vibration is evaluated as its damping capacity. The quelling of vibration by converting the mechanical energy into heat can be important in structures and devices with moving parts. Components made of materials with a high damping capacity, like gray iron, can reduce noise such as chatter, ringing and squealing, and minimize the level of applied stresses.

Gray Iron Applications

Gray iron can be cast very easily and has good machinability.
It is typically used in the following applications where strength is not the main required property:

  • Weights & Counter Weights
  • Compressors
  • Powertrain Parts
  • Suspension Components
  • End Plates
  • Valves and Fittings
  • Pulleys
  • Sheaves
  • Linkages
  • Building facades
  • Table legs and bases
  • Pumps
  • Brackets
  • Housings
  • Steering Knuckles

Gray Iron Part Design

Looking to cast your next part? Contact the pros at Ferroloy for expert advise about casting conversions. Our sales and technical team work directly with OEMs around the United States to reduce costs up to 60% by converting to a casting.

Contact us today for a quote or more information.

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Each iron casting at Ferroloy is throughly examined by our quality assurance team.
Contact our Foundry in Kansas today for turn-key solutions for gray iron castings.