QQ-C-390B Superseded by ASTM B Specifications
![](https://static.wixstatic.com/media/300c06_cba28c608ec7474fb079b26073401a3b~mv2.png/v1/fill/w_49,h_45,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/300c06_cba28c608ec7474fb079b26073401a3b~mv2.png)
QQ-C-390B type 3 has been superseded by ASTM B505
QQ-C-390B type 2 has been superseded by ASTM B271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