1X Aluminium Plate Sheet EN-AW 7075 T651 Grade 16mm Thick 140mm Wide 140mm Long

7075-T651 is significantly stronger than 6061-T6, with tensile strength typically 40–60% higher. However, 6061-T6 offers better corrosion resistance, easier weldability, and lower cost. Choose 7075-T651 when maximum strength and stiffness are the priority; choose 6061-T6 for general-purpose fabrication, welded assemblies, or outdoor use.

Welding 7075 aluminum is generally not recommended. The alloy is susceptible to stress-corrosion cracking in the heat-affected zone, which can significantly reduce joint strength and reliability. For applications requiring welded joints, 6061 or 5052 alloys are better choices. Mechanical fastening (bolts, rivets) is the preferred joining method for 7075.

Yes. 7075-T651 can be hard anodized or Type II anodized to improve surface hardness and corrosion resistance. Note that due to the high zinc and copper content, the anodized finish on 7075 may appear slightly darker or more uneven compared to 6061. Always test on a sample piece before anodizing a finished part.

7075-T651 machines well with sharp carbide end mills, drills, and turning inserts. Use cutting speeds appropriate for aluminum (typically 200–500 SFM for carbide), apply a suitable aluminum cutting fluid or coolant, and avoid dull tooling to prevent work hardening and poor surface finish. HSS tooling works for light cuts but carbide is preferred for production runs.

Both are aerospace-grade alloys with high strength. 7075-T651 generally offers higher tensile and yield strength, making it the go-to for maximum load-bearing applications. 2024-T3/T4 has better fatigue resistance and is preferred for cyclic-load applications like aircraft skins. For most machined structural parts, tooling plates, and fixtures, 7075-T651 is the more common choice.

Yes. The T651 temper specifically includes a stress-relief stretching step that minimizes residual internal stresses, resulting in a flat plate with low distortion. This makes it suitable for use as a machining blank without requiring additional flattening or stress-relief operations in most cases. Minor surface marks from handling or cutting are normal and do not affect dimensional accuracy.

7075 aluminum has lower corrosion resistance than 6061 or 5052 due to its high zinc and copper content. For outdoor or high-humidity applications, the plate should be anodized, painted, or otherwise coated to prevent surface oxidation and pitting. In dry indoor environments, the mill finish is generally adequate for most structural and tooling applications.