Aluminium 6061 vs 7075: Composition, Strength & Application Differences Explained
6061 vs 7075 Aluminium: Which Grade Should You Specify? 6061 vs 7075 Aluminium: Which Grade Should You Specify? Two aluminium grades come up in almost every industrial specification discussion: 6061 and 7075. Both are heat-treatable, both are widely stocked, and both are used in structural and machined applications. But they are not interchangeable — and choosing the wrong one has real consequences for cost, corrosion performance, and fabrication. This article gives procurement engineers and project buyers in the UAE and GCC a direct, practical comparison to support the right specification decision. Quick Answer: 6061-T6 offers 310 MPa tensile strength, excellent weldability, and good corrosion resistance — the correct default for marine, oil and gas, construction, and fabricated assemblies. 7075-T6 offers 572 MPa tensile strength — nearly double — but with lower corrosion resistance, poor weldability, and higher cost. Specify 7075 only where maximum strength-to-weight...