GRAY IRON CASTINGS

Gray iron has been produced in various forms for thousands of years, making it the most recognized type of cast iron. Gray irons can be alloyed to increase strength and hardness while cast, or to increase their response to heat treatment. Gray iron castings can be machined easily and are used for damping or controlling vibration in a variety of applications. The mechanical properties of gray iron are determined by the combined effect of its chemical composition, processing technique in the foundry, and the solidification and cooling rates. Properties of gray iron castings are affected by its shape, size and wall thickness as well as on the iron that is used to pour it.

Bearing Retainer 1lbs	Compressor Body 18 lbs	Compressor Cylinder 3 lbs

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Raw ductile iron castings after shake out from mold and before
risers and gates are removed in a casting company

Gray Iron Castings Gallery

Cover 6 lbs	Gear Housing 12 lbs	Geared Flange 6 lbs

Valve Retainer 8 lbs			Housing Extension 6 lbs

Water Jacketed Exhaust Manifold 34 lbs	Brake Drum 24 lbs	Cover 22 lbs

Headplate 17 lbs	Crossover Pipe 11 lbs	Mounting Ring 25 lbs

Grey iron – Flake graphite provides gray iron with unique properties (such as excellent machinability) at hardness levels that produce superior wear-resistant characteristics, the ability to resist galling and excellent vibration damping. Grey iron is sometimes spelled gray iron.

Strength and hardness are sensitive to section thickness in gray iron castings. In thin sections, the material can be hard and difficult to machine. In heavy sections, its strength is reduced significantly. Because the modulus of elasticity for gray iron is higher in compression than it is in tension, the use of standard structural formulas results in a conservative design.

Grey Iron Casting Properties