1.1 Powder metallurgy (P/M) components are made by cold pressing and sintering metal powders. These parts may be used as bearings or in structural applications. The P/M process is used for economic advantage and unique properties.

This information serves as a guide to the specification for sintered metal powder bearings and structural parts (ASTM Designations: B 255, B 282, B 438, B 438M, B 439, B 458, B 525, B 595, B 612, B 715, and B 783.