Of course there is no "aerospace only" alloy. There are a whole bunch of specialized alloys that get primarily used in aerospace so, and those are a far cry fro

Of course there is no "aerospace only" alloy. There are a whole bunch of specialized alloys that get primarily used in aerospace so, and those are a far cry from your average construction material alloys (those get used to, but pose their own kinds of challenges). That's the whole point. Also, P/N were internal, of course the supplier had different PNs, including or excluding certificates and such things. And before some asks, no, those inventories, the ones with and without certificates and paper work, never get mixed. That they don't is actualy audited. If go away from metalic materials, there is only a limited number of suppliers for aerospace grade carbon fibres: Torray and two others I can't remember the names. And those fibres actually are different from the non-aerospace ones in some cases, while in others they quite similar to the non-aerspace ones technically. Overall I think we agree so. And yes, people tend to oversell the "aerspace grade" stuff. As they do with "mil-spec". ITAR is a pain in the ass, on top of being a US government thing not limited to aerospace. Surface treatment is tricky, as a special process (for QA purposes, those have rigorous standards) they take ages to get certified.