Technical library
Compare structural requirements, exposed surfaces and fabrication before choosing an extrusion alloy.
Start with the drawing
6061 is commonly considered for structural and machinery applications. 6063 is commonly considered where extrudability and visible surface finish matter. These selection tendencies do not replace the drawing and purchasing requirements.
Compare like conditions
Use the comparison tool to inspect the cited extrusion conditions. The displayed minimum values apply only to their stated section thicknesses. Do not compare a typical sheet value with a minimum extrusion value as though they were identical evidence.
Account for finishing and joining
Define the exposed faces and anodizing requirements. Both alloys are heat treatable, and welded regions can have reduced strength. The final fabricated condition needs its own assessment.
Write a complete enquiry
Include alloy, temper, section drawing, length, tolerance, finish and inspection requirements. Ask the supplier to confirm the specified condition for the actual section.
Continue exploring
Alloy database · Product guides · Engineering calculators
Sources and verification
Selected facts checked 14 October 2026. Source data is reference information, not certification of supplied material.
- Hydro • 6061 extrusions — 2019/01 (February 2019) · checked 2026-10-14
- Hydro • 6063 extrusions — 2026/01 (June 2026) · checked 2026-10-14
Keep the product purpose visible
The Hydro references describe extruded grades and supplied tempers. UACJ separately associates 6063-T6 with a busbar product, demonstrating an application-specific use rather than a universal selection rule. For a comparison, state whether the part is a visible architectural profile, machined member or conductor and compare evidence for that supplied form. Appearance, machining and electrical functions cannot be collapsed into one strength ranking.
Source: www.hydro.com, www.hydro.com, www.uacj.co.jp
