7075 Alloy Aircraft ALUMINUM Bar Stock Billet Block (3" x 5" x 7") MIL-SPEC.   Weight is 11# each.

New, no box or packaging.  Military surplus, Bulk packed.  May have dust, dirt, scratches, decal residue, paint.

The labels indicate ARCONIC 7075-T7351 Alloy.  Additionally, I had these analyzed by XRF (X-ray Fluorescence Spectroscopy), and it confirms 7075, or 7475 (these grades have almost identical elemental composition).  See photos of actual analysis results.

7000 series are alloyed with zinc, and can be precipitation hardened to the highest strengths of any aluminum alloy. Most 7000 series alloys include magnesium and copper as well.   Known as the zinc grades – zinc being the largest alloying element, the 7000 series grades are the hardest and strongest commercial grades of aluminum.  Grade 7075 is the most common of the 7000 series grades.  It is a very, very high strength alloy;  the strongest of all commercial grades of aluminum. In fact, grade 7075 aluminum is stronger than many types of mild steel.