This 6061 aluminum meets ASTM B221 specifications.
1" x 1" Aluminum Angle 6061, 4" Length, T6511 Mill Stock, 1/8" Thick It has a high resistance to corrosion, and an excellent weight-to-strength ratio.. 6061 aluminum is a lightweight, general-purpose aluminum alloy that can easily be machined or welded. The T6511 temper also means it has been heat treated for additional strength (Yield Strength: 35,000 psi).