ATI 425® alloy is a high strength, high ductility, titanium alloy available in a variety of product forms, including cold-rolled coil or sheet. Originally developed by ATI for ballistic armor applications, it has recently been characterized for aerospace and industrial applications, including publication of design allowables in the MMPDS handbook.

ATI 425® alloy is an alpha-beta titanium alloy that uses iron and vanadium as beta stabilizers as well as aluminum as an alpha stabilizer. The lower aluminum and vanadium contents and higher oxygen and iron contents give ATI 425® alloy a unique combination of ductility and tensile strength.

The combination of strength and ductility found in ATI 425® alloy makes it useful for titanium applications that require cold forming, such as roll-forming and bending, while still providing superior strength compared to low alloy grades of titanium.

ATI 425® alloy in the cold-rolled titanium coil or sheet product forms provide advantages that come from continuous processing that are not available in pack-rolled sheet. For example, ATI 425® alloy cold-rolled product has better gauge tolerance and surface finish than pack-rolled sheet and is available in lengths ranging from cut sheet to coil. Coil length products are generally not available in other titanium alloys with tensile strengths exceeding 130 ksi (896 MPa) and ductility exceeding 10% elongation.