6063 Aluminum Extrusion Wins by Being Easier to Manufacture
The Real Reason 6063 Beats 6061 in Extruded Profiles 6061 is the stronger alloy on a data sheet. That single fact has led to a lot of over-specified, overpriced, and hard-to-produce aluminum profiles. For extruded products, strength is only one part of performance. The more decisive question is often whether the alloy can become the shape the engineer drew, at the tolerance the assembly needs, with the surface the customer will accept, at a yield the manufacturer can repeat. That is where 6063 earns its reputation. It is not chosen over 6061 because engineers have forgotten about tensile strength. It is chosen because extrusion is a manufacturing problem before it is a material-property problem. ...