IDENTIFYING UNKNOWN METALS

[johnnielsen]

I was talking with three or four people at our last meetup about identifying metals by various methods including the spark test using a bench grinder. I can't remember their names/usernames so I am posting non copyright issue documents on the subject.

I also have a couple of Handouts (in pdf form) from various sites on the subject but they are likely covered by copyright as they are free documents you can find on their websites. You can find them here.

https://www.weldinghandbook.com/types-of-metals/metal-identification/

https://www.hlcollege.ac.uk/files/P...TALS FOR ENGINEERING CRAFTSMEN_tcm2-18961.pdf

 

[RobinHood]

Thanks John.

I may have been able to identify the mystery metal I have been using to build my QCTP to holders: it could be Alloy C276 (UNS N10276) - a nickel chrome alloy with high moly and tungsten.

A lot of the mechanical and descriptive properties that I have been able to find are identical to the metal I have. The only true test would be to perform a chemical analysis - I may still do that.

 

[johnnielsen]

That is some wicked material. No wonder it was eating up tooling. I`ve had experience machining nickel and inconel 600 and found it abominable.

 

[RobinHood]

Yes, it explains a lot of the trouble it had machining it, until I got the speeds and feeds correct.

One good thing: they won’t rust any time soon.