Steel alloy shaft Ferrium® C64®

for the aerospace industry

Overview Ferrium C64 (AMS 6509) is a new high strength, high surface hardness, good fracture toughness carburizable steel that also has high temperature resistance and hardenability. C64 steel is a higher performance upgrade from 9310, X53 (AMS 6308), EN36A, EN36B, EN36C and 8620. It can achieve a surface hardness of 62-64 Rockwell C (HRC) via vacuum carburization. C64 steel is double vacuum melted (i.e., vacuum induction melted and then vacuum arc remelted or "VIM/VAR") for high purity, leading to much greater fatigue strength. Improved C64 Steel Properties versus Incumbent Materials The following table shows that for example C64 steel has equivalent toughness to 9310, but a a greater surface hardness (up to ~63 HRC) and a yield strength that is ~45 ksi greater: Additional information can be found in the C64 Datasheet or on Carpenter's Ferrium C64 page.