This SAE Standard covers the mechanical and physical property requirements for Austempered Ductile Iron (ADI) castings used in automotive and allied industries. Specifically covered are:

a. Hardness

b. Tensile Strength

c. Yield Strength

d. Elongation

e. Modulus of Elasticity

f. Impact Energy

g. Microstructure

In this document SI units are primary and in-lb units are derived. Appendix A provides general information and related resources on the microstructural, chemical and heat treatment requirements to meet the mechanical properties needed for ADI in particular service conditions and applications.

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