Inconel 718 Melter Based on Heat Number?
Inconel 718 Melter Based on Heat Number?
(OP)
Is anyone familiar enough with the heat numbering formats used by the various melters of Inconel 718 to tenatively identify the original melter/producer based on the heat numbers alone?
The particular format I'm looking at is two numbers, followed by the letter "J", followed by a single number, followed by the leters "EY".
Looks like: nnJnEY with the "n"s representing numbers.
The material would probably beeen melted sometime in 1980 (if that helps, or rules anyone out).
Thank you in advance for any information you can provide.
The particular format I'm looking at is two numbers, followed by the letter "J", followed by a single number, followed by the leters "EY".
Looks like: nnJnEY with the "n"s representing numbers.
The material would probably beeen melted sometime in 1980 (if that helps, or rules anyone out).
Thank you in advance for any information you can provide.





RE: Inconel 718 Melter Based on Heat Number?
Whether they have the records or have anyone who knows the numbering system use during that period is the big question. I would try a personal contact.
http://www.specialmetals.com/products/
If not successful you might check with the following to see where the records might be.
http://www.inco.com/
RE: Inconel 718 Melter Based on Heat Number?
RE: Inconel 718 Melter Based on Heat Number?
RE: Inconel 718 Melter Based on Heat Number?
I think that this is out of Huntington, WV (was Inco, now SMC) and the 'J' is a typo. The number sould be nnnnEa.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
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RE: Inconel 718 Melter Based on Heat Number?
RE: Inconel 718 Melter Based on Heat Number?
"J" does not appear to be a typo, as the "nnJnEY" format appears (with differnt "n" numbers) on multiple certs from different secondary processers in this time frame.
From what I can see (at least in the early '90s from an INCO cert) Huntington may have prefixed their heat numbers with "HT" (example: HTnnnnEY).
I wonder if the "J" was another location?
RE: Inconel 718 Melter Based on Heat Number?
Kenneth you are right on target. Special Metals (INCO) used the format HTnnnnE to specify Inco 718 material. The last character (in your case a 'Y') specified the type of melting. The 'Y' designation means that it was VIM melted followed by VAR remelting. HT-E was the alloy designation. 'nnnn' was the batch number. This information is only for the Huntington, West Virginia plant. They also have plants in Hereford, England and Burnaugh, Kentucky and Utica, New York that make alloys. The numbering is a bit different from plant-to-plant so that traceability is maintained back to a certain melt shop. The 'J' in your 'nnJn' sequence would definitely fit the pattern of calling out another melt shop within their system.
Now, in 1980, Special Metals did not own Inco Alloys. So, the only melt shops available were the Huntington, Hereford, and Burnaugh facilities. It is possible that the heat of Inco 718 you are discussing came from the Burnaugh facility, as I believe they had a VIM furnace at that time. (The VAR remelting would have been down in Huntington though.)
If you want more information on the specific batch, I suggest you contact Special Metals directly (www.specialmetals.com). Your best bet will be to talk to someone in the melt group (metallurgical engineers). Sales/Marketing may also be of help.
~NiM
RE: Inconel 718 Melter Based on Heat Number?
You might check with some old line distributers like
HP Alloys, Fry and such if INCO and Special Metals can't help.