How do i tell what grade of scrap titanium im looking at

At school, whenever an apprentice would bring a steel of unknown origin to my instructor and ask, "what is it", he would smell it, proclaim it "D2" and hand it back.

Regards,

Robin

If it's that critical an application, what in the hell are you doing looking at scrap suppliers anyway ???

Instead, you should be using a legitimate metals supplier and insisting he provide proper mill certifications!!!

Shhh!!!--( dont tell anybody )......but generally--raw materials are marked / stamped as to the alloy and actual heat lot--this documentation is traceable all the way to the foundry that produced it, for liability reasons....and understanably so--none of us would want to ride in an airplane that has parts in it that were made of who knows what metal that happened to be available at the local scrapyard last month.......

But once this traceability is lost, it generally falls into the realm of "scrap metals", unless you care to have an assay done.

So I suggest you at least look for a piece that has the original identifying ink stampings still intact.

By the way, I seem to recall quite a few ebay sellers offering salvage titanium bits and pieces etc. in small quantity, maybe worth checking there.

I wouldnt say its critical, but i just want to get the right type so I dont waste my time and money by ending up with the wrong stuff.

Ive found a scrap yard that sells it for $3/ pound whereas Ive found a website supplier that has the marked type and grade and dimensions... but works out to about $50/ pound. Theres a huge cost difference when it goes from full sheet and certified to smaller scrap quantities.

If theres some method to be able to visibly check for the difference of CP1-3 or 6al4v then I wont have to make the huge price leap

I havent a clue as to what the difference in apearance might be, but again, the way its properly done is you look for the markings, purchase certified material, or have an assy done--why take chances ???

By the way, the guy who lists the "6-4 Titanium sheet" is almost certainly describing 6Al4V, which stands for 6% Aluminum, 4% Vanadium, which is a very standard Titanium alloy.

Jon

All the Ti sheet that I have gotten from Boeing Surplus is clearly marked with the mil spec and 6 al 4 va.

Dan

In this instance I would call the seller and ask if the stock is marked and ask after it's origin. Seller has a high rating. I would trust but verify. Kent

You can't tell by looking, unless it is stamped, which is unlikely.

For aproximately $50, you can get a basic chemical analysis to tell you what it's alloy is.

Dave

not >aware of the cost differential, then explain it to him. He's the one paying the

the cost > of material on the job, you did not quote it properly. Or is it just being greedy?

Michael,

Don't forget the name of this group.

Regards,

Robin