Ductile (or nodular) iron has grown in popularity because its ductility, elasticity and high strength properties allow heavier service loads. It is easily cast and machined, and is as corrosion resistant as gray iron. Production of ductile iron requires more complex metallurgy, the use of special melting stock and special quality control procedures.
|Specifying Body||Spec No||Grade or Class of Material||Tensile Strength
|Brinell Range (BHN)||Typical Applications|
|60,000||40,000||18||170 Max||Pressure castings, such as valve & pump bodies.|
|65,000||45,000||12||156-214||Machinery castings subject to shock and fatigue loading|
|80,000||55,000||6||187-255||Crankshafts, gears and rollers. High strength gears, automotive & machine components, pinions & gears.|
|* Heat treatment may be required to achieve this specification|