Grey iron castings are the most common type of cast iron that is poured today. Due to its graphitic microstructure, it forms grey fractures, hence the name grey cast iron or simply grey iron. As with all things, Grey Iron is only as good as the materials that are used to make it. Willman Industries only buys the best scrap and raw materials to produce our grey iron castings. We believe this is the key to our superior grey iron castings. (Do you wonder What is Grey Iron? Click the link!)
Although grey iron castings have a low tensile strength and poor ductility its high thermal conductivity and specific heat capacity make it a very valuable metal to cast. Our Grey Iron Foundry follows the Meehanite process for wedge control on all of our grey iron castings. The dense microstructure of Meehanite metal assures casting solidity and consistent physical properties.
The graphite level in grey iron is a very critical property that makes it a common engineering alloy. The graphite acts as a lubricant when machining the casting by either cutting or boring. The graphite flakes also lubricate when the casting is in use which assists in reducing wear on parts as well it absorbs energy due to its dampening capabilities. We are able to control the metallurgy in the furnace, and in each ladle to ensure that your grey iron casting has the graphitic properties to suit your needs.
At Willman Industries we have engineered our own gating and rigging to ensure the quality and consistency of the entire pour process. Maintaining appropriate levels of silicon helps to increase the fluidity of the pour as well promotes corrosion resistance of the completed casting.
Willman’s Grey Iron Foundry will meet and, in almost every case, exceed our customer’s specifications.