1.1 This specification establishes requirements for bronze castings for turntables, movable bridges and bridge parts, and bronze castings suitable for use in bridges and other structures for fixed and expansion bearings where motion is slow and intermittent. Historically the alloys in this specification have been used in the applications listed in Appendix X1. Actual practice may vary.

1.2 The values stated in inch-pound units are the standard. SI values given in parentheses are for information only.