material examination steelframe composition

[Slick61]

Originally Posted by Ghiblicup

Uuups I opened the Pandora's box.

Plase no more fighting about devices and stuff - I was just interested if the steel from the Frame -. as being the "heart" of a car could be evaluated as genuine if we test this material.
I do still believe it would be an interesting add-on to proof the originality of a car. (Besides other indications of course) But with all these engines exhanged in period and later, all the re-worked interiors, all the custom made parts, all the interchangabel components and finally all the repaired/rebuilt bodies - there is not really a lot which is really genuine. Right?
So how to do figure this out? There must be a reason, otherwise folks like Ferrari Classiche and Mercedes Benz Historic Centre wouldn't do it as well?!

So what is the magical formula of genuine Cobra-frame steel???

not fighting... just trying to help.

call Shelby American... they may have an idea... tho who knows how many suppliers they bought their steel from over the years.

which brings me to a question... did the "original" Shelby 427 Cobras use a modified AC chassis, or was it a completely new chassis mfd by Shelby?

... but there may not BE a magical formula...

steels made today CAN BE much cleaner than those of 50 years ago, and most likely have more consistent/reproducible mechanical & microstructural properties... so as far as formula/composition... you could probably argue that the crappier it is, the older/more authentic it probably is. (tough to prove tho) Domestically made steel was, for many years, considered superior to that produced overseas- tho I think that has finally changed. Most of the major steel mills have been replaced by recycling/mini-mills and/or specialty mills. Most of the undesirable elements/contamination can be removed... some do it better than others. The "cleanliness" of the steel can be analyzed via several techniques... it just takes time... and money.