QQ-C-390B Superseded by ASTM B Specifications

QQ-C-390B type 3 has been superseded by ASTM B505

QQ-C-390B type 2 has been superseded by ASTM B271

Notice of Cancellation for QQ-C-390B, Notice 2, October 28, 1993.

QQ-C-390B, dated December 12th, 1983 is hereby cancelled. Future procurement's for this material should refer to the appropriate portions of:

ASTM B505, Copper-base Alloy Continuous Castings

ASTM B271, Copper-base Alloy Centrifugal Castings