Forms to facilitate the registration of alloys and products standards following specific rules as prescribed in the pertinent American National Standards and the registration records.

The purple sheets are the newest addition to the Aluminum Association’s long-running “rainbow sheet” series, which provides alloy designations and chemical composition limits for various types of aluminum. 

Aluminum has played a crucial role in space exploration from the beginning, chosen for its lightweight strength and ability to withstand the stressors of space travel.