ASTM A897/A897M-22

Standard Specification for Austempered Ductile Iron Castings

ASTM International , 10/01/2022

Publisher: ASTM

File Format: PDF

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Description

Standard By:ASTM International , 10/01/2022

Published:10/01/2022

Pages:11

File Size:1 file , 290 KB

Language:English

Note:This product is unavailable in Russia, Ukraine, Belarus

1.1This specification covers ductile iron castings that are subsequently heat treated by an austempering process as defined in 9.1.

1.2The application of the austempering heat treatment extends the range of properties achievable in ductile iron castings.

1.3No 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.

1.4The production of castings, machining (if required), and the austempering heat treatments may be performed by different manufacturers, as covered in Section 13. The purchaser should establish by contract agreement, at the time of ordering, the responsibility of the various parties for meeting the specification requirements.

1.5The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

1.5.1Exception-Within the text, the SI units are shown in brackets.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.