THE Materials Oracle
Join Date: Feb 2006
Location: Finally... home :-)
Bikes: Univega Alpina 5.1 that became a 5.9, that became a road bike... DMR TrailStar custom build
Originally Posted by DannoXYZ
Most common is 6061-T6 and requires post-weld heat-treatment. Not as common is 7005. Doesn't require heat-treatment afterwards, but is more difficult to weld.
it, no, but I'd not ride one that hasn't. Having said that, I wouldn't ride Al anyway....
There are two alloy families that are commonly used. As Danno says, there are the 6000 series - of which there are a number of alloy compositions and heattreatment regimes, and the 7000 series, just the same.
6000 series are principally alloyed with silicon and magnesium and are at best medium strength alloys. 7000 series are the high strength alloys and are a strengthened with zinc, magnesium, silicon, copper, and often flavoured with titanium and zirconium, too. Both are available in a variety of sections and specific compositions from most aluminium alloy stockholders.