Peachy!":3a04k1fu said:So…. The Claud Butler Titanius….
It’s definitely made of two different metals, one for the head tube, seat cluster, bottom bracket shell and rear triangle, the other for the three main tubes… construction is interesting, as the diamond shapes look like a kind of clip in extra location or security to back-up what I presume is some sort of adhesive bond. As for what these materials are I’m not certain, but they are definitely ‘hard’ metals not aluminium… this is pretty much sell evident from the tight welding which looks very much like a Cro-mo weld, but neither respond to a magnet…(un like Cro-mo steel).
Most common stainless steels are 'austenitic' – these have a higher chromium content and nickel is also added. It is the nickel which modifies the physical structure of the steel and makes it theoretically non-magnetic.