Ductile Iron Casting Foundry

in Knoxville, TN

Ductile Iron, also referred to as Nodular Iron, is a type of cast iron distinguished by its unique graphite structure. Instead of forming flakes like in Gray Iron, the graphite in Ductile Iron appears as round nodules. This spheroidal shape gives the material enhanced mechanical properties, including significant elasticity, excellent impact resistance, and a high yield strength. These features make Ductile Iron an ideal choice for demanding engineering applications that require both toughness and durability. It offers mechanical properties similar to steel while retaining the castability, corrosion resistance, and machinability found in Gray Iron. Ductile Iron is often identified using a three-number designation. The first number represents the minimum tensile strength in thousands of pounds per square inch, the second indicates the minimum yield strength, and the third reflects the percentage of elongation, which measures ductility.

Typical Applications

• Machinery castings subject to shock and fatigue loading
• Shanks for Asphalt Mixers and Pug Mills
• Gears and Rollers
• Flap Valve Housings