Development of 7140 T7351 – The Newest Addition to Constellium’s Advanced Product Portfolio

7xxx alloys are used extensively by the aerospace industry in machined and fabricated large aircraft structures, as well as in a multitude of smaller components. Constellium’s advanced alloys 7140 and 7160 deliver significantly improved properties compared to legacy alloys such as 7050 and 7475, and can enable lighter weight, higher performance, and increased inspection intervals. 7140-T7651 and T7451 are already in use by multiple OEM’s as ribs, spars, and monolithic machined structures.

The development of 7160 introduced the first new T7351 temper product to the industry since 7475-T7351 in the 1960’s. The T7351 designation implies the highest level of guaranteed performance in accelerated stress corrosion testing which, together with the excellent strength-toughness balance of 7160-T7351 enables lower part weight through optimized cross-sections and part design.

To complement 7160-T7351, Constellium has recently developed the T7351 temper of 7140, providing advanced product coverage from 1-10in, and enabling replacement of 7050-T7451 and other legacy products.

An overview of 7140-T7351, its standardization status, and performance comparisons and advantages compared with incumbent products will be presented. In addition, an update will be made of Constellium’s recent developments, including Aheadd powders for additive manufacturing.