SAE AMS6478B

Steel Bars and Forgings 3.1Cr – 11.5Ni – 13.5Co – 1.2Mo (0.21 – 0.25C) Vacuum Melted Annealed Heat Treatable to 290 ksi (1999 MPa) Tensile Strength

Published by	Publication Date	Number of Pages
SAE	2005	–

SAE AMS6478B – Steel Bars and Forgings 3.1Cr – 11.5Ni – 13.5Co – 1.2Mo (0.21 – 0.25C) Vacuum Melted Annealed Heat Treatable to 290 ksi (1999 MPa) Tensile Strength

This specification covers a premium aircraft-quality alloy steel in the form of bars forgings and forging stock.

These products have been used typically for parts requiring a combination of high strength high toughness and weldability but usage is not limited to such applications. Product after proper heat treatment should attain a minimum tensile strength of 290 ksi (1999 MPa) and yield strength of 245 ksi (1689 MPa).