Characterization of the Mechanical Properties of ATI 425® Alloy According to the Guidelines of the Metallic Materials Properties Development & Standardization Handbook

ATI 425^® Alloy is an alpha-beta titanium alloy with good ductility and strengths comparable to Ti-6Al-4V alloy.  The higher ductility of ATI 425^® alloy permits continuous cold-rolling into coil sheet products and provides better formability during component manufacturing.  The combination of strength and ductility of the alloy has generated interest within the airframe community.  However, one barrier to insertion in aerospace applications has been the lack of detailed characterization of the mechanical properties of the alloy as required by the Metallic Materials Properties Development & Standardization (MMPDS) Handbook.  This presentation will describe the testing program that was executed to achieve inclusion in the MMPDS handbook.  The mechanical properties, including “A” and “B” basis minimums, for ATI 425^® alloy cold-rolled coil sheet and hot-rolled plate products, produced according to AMS 6946, will be presented.  The development of an AMS specification for hot-rolled bar and shape products will also be discussed.