ASTM A289/A289M-97(2018)

1.1This specification covers nonmagnetic alloy steel retaining ring forgings for generators.

1.2The 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 non-conformance with the standard.

1.3Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.

1.4This 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.