For a mostly pure copper part, the following industry standard grades are available through Crescent Brass Manufacturing.

 

COPPER SPECIFICATIONS
DESIGNATION COPPER%
C80100 99.95 (min)
C80300 99.95 (min)
C80500 99.75 (min)
C80700 99.75 (min)
C80900 99.70 (min)
C81100 99.70 (min)