Aluminum Trailer Alloy Choice: Why 6061, 6063, and 6005 Matter
Why the alloy decision carries the load In trailer work, the fastest way to spend money twice is to pick an extrusion by shape alone. A channel can look identical on a print, yet one version survives years on a cargo trailer while another starts cracking around fasteners after one season on a boat trailer. The difference is usually alloy and temper, not the outline of the profile. For a practical alloy selection breakdown, the tradeoffs become clearer once the part is split into three questions: what load it carries, how it is joined, and what environment it lives in. That is the real lesson. The alloy sets the failure mode. ...