Iron Castings - Ductile

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
(psi)
Yield Strength
(psi)
Elongation
(%)
Brinell Range (BHN) Typical Applications
ASTM
SAE
ASTM
ASME
A536-88
J434C
A395-88
SA395
60-40-18 *
D-4018
60,000 40,000 18 170 Max Pressure castings, such as valve & pump bodies.
65-45-12
D-4512
65,000 45,000 12 156-214 Machinery castings subject to shock and fatigue loading
80-55-06
D-5506
80,000 55,000 6 187-255 Crankshafts, gears and rollers. High strength gears, automotive & machine components, pinions & gears. 
100-70-03
D-7003
100,000 70,000 3 245-295
* Heat treatment may be required to achieve this specification