Inconel 718 Melter Based on Heat Number? 4

[Kenneth]

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.

 

[unclesyd]

In the early 80's it stands a good chance that it was produced by INCO who is now Specialmetals:

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/

 

[Kenneth]

Thanks! Are you aware of anyone other than INCO melting 718 in this time frame?

 

[yates]

Four-figure melt numbers followed by EY looks very much like an Inco Alloys (now Special Metals) heat, but I have never seen one with a 'J' in the middle. Bad copy ?

 

[EdStainless]

Sure, Alvac and Haynes were melting then. As were a few others.
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.

http://www.trenttube.com/Trent/tech_form.htm

 

[unclesyd]

I made a call and checked to see who supplier INCO 718 for us in 79 & 80. There were four orders for 718 and all specified INCO as the source. They are trying to find the MTR's, if we kept them as the material was for fasteners, and check heat number format.

 

[Kenneth]

Thank you everyone!

"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?

 

[NickelMet]

All, I worked at INCO/Special Metals from 1996-2002. Inco 718 was made two ways: VIM melted then either ESR'd or VAR'd. There may have been some AOD melted heats but I don't think so.

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 (

http://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

 

[unclesyd]

Sorry they havn't found any MTR's from that peroid.

You might check with some old line distributers like
HP Alloys, Fry and such if INCO and Special Metals can't help.