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ASTM
A897/A897M-22
Standard Specification for Austempered Ductile Iron Castings
2022
11
ASTM Vol.01.02 (2023)
This specification covers ductile iron castings that are subsequently heat treated by an austempering process as defined in 9.1.
The application of the austempering heat treatment extends the range of properties achievable in ductile iron castings.
No precise quantitative relationship can be stated between the properties of the iron in various locations of the same casting or between the properties of castings and those of a test specimen cast from the same iron (see Appendix X1). However, austempering heat treatment will tend to diminish any differences in mechanical properties.
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