FED QQ-S-00629 FS4032, ASTM A322 4032, and SAE 770 4032 are obsolete specifications; refer to SAE J1397 for SAE 770 - other replacements are unknown. The microstructure of the annealed cold drawn bar is mostly lamellar pearlite and ferrite. |
UNS G40320, ASTM A29, ASTM A29M, ASTM A322, ASTM A331, SAE 770, FED QQ-S-00629 |