Aluminum Rectangle Bar 7075-T651 Cold Finish is a top-tier structural alloy engineered for extreme-stress applications that require the highest possible strength in a lightweight material. The T651 temper signifies that the bar has been solution heat-treated, artificially aged, and stress-relieved by stretching, which ensures the material remains exceptionally flat and stable during complex machining operations. Thanks to the cold-finish process, this rectangular stock boasts superior dimensional accuracy, sharp corners, and a smooth surface that reduces the need for additional grinding or prep work. Often used as a lightweight alternative to steel, it is the preferred choice for high-performance aerospace parts, heavy-duty gears, and precision tooling. While its strength is nearly unmatched, it is best suited for environments where corrosion is controlled or where the part can be protected by anodizing.