Excuse me for my delayed response. A change from ENiCrFe3 to ENiCrFe2 is not an essential variable as per Sec-IX (same F & A No). Hence as per code there are no issues. However Ni-Cr-Fe electrodes conforming to E-NiCrFe3 spec for are more commonly available, and both ENiCrFe2 & ENiCrFe3 have almost matching chemistry and properties (see attached).Hence I would say that qualifying PQR with one brand , preferably E-NiCrFe3 would be a good option.
As regarding your query on use of ER NiCrMo-3+E NiCrMo-3 electrodes, if the specification calls for the API-582 (see below) requirements to be followed , then you may have to choose this type of welding consumables.
Otherwise E/ER-Ni-Cr-Fe-3 should be fine.
Table 6-1 Application of Nickel-Based Electrodes in Sulfur and Non-Sulfur Environments
| AWS Filler Material Designation | Max. Design Temperature (non-sulfur environment) | Max. Design Temperature (sulfur environment) |
| ENiCrFe-3 | 1000 °F (540 ºC) | 700 °F (370 ºC) |
| ERNiCr-3, ENiCrFe-2 | 1400 °F (760 ºC) | 750 °F (400 ºC) |
| ERNiCrMo-3 | 1100°F (590 ºC) | 900°F (482 ºC) |
| ER NiCr-4 | 1100°F (590 ºC) | 1100°F (590 ºC)* |
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of GERING, Erwin
Sent: Thursday, April 15, 2010 2:55 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:4845] Buttering procedure for P4 to Inconel
Dear Hegde
Why not mix up ENiCrFe3 or ENiCrFe2 ?
With kind regards,
Erwin GERING
Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens PB HEGDE
Verzonden: donderdag 15 april 2010 5:32
Aan: materials-welding@googlegroups.com
Onderwerp: RE: [MW:4835] Buttering procedure for P4 to Inconel
i)You can butter either by ENiCrFe3 or ENicrF2 individually but no mix up
ii) After buttering on P4 you require to carry PWHT of that buttered components
iii) later on further butt joint with Inconel ,you need go for PWHT
Regards
Hegde
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim
Sent: Wednesday, April 14, 2010 12:27 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4820] Buttering procedure for P4 to Inconel
Dea Sir,
I would like to qualify a new PQR for this application. Can I use ENiCrFe2 for buttering & ERNiCr-3 + ENiCrFe2/Fe3 for the buttwelding?.
Or I need to go for ER NiCrMo-3+E NiCrMo-3?.
Regards,
Ibrahim
On 13 April 2010 13:46, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
You may use Inconel to Inconel PQR for butt weld, however for buttering you require a separate buttering PQR for buttering thickness less than 5mm or a groove weld PQR on P4 material welded with Inconel can be used when your buttering thickness exceeds 5mm. Weld overlay PQR can't be used for buttering.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim
Sent: Tuesday, April 13, 2010 2:36 PM
To: materials-welding@googlegroups.com
Subject: [MW:4804] Buttering procedure for P4 to Inconel
Hi Members,
Kindly request your suggestion on the following matter.
We have to weld one 2" Nozzle (PNo.4) to Tube sheet with (PNo.4). Due to some practical difficulties we have to avoid PWHT of this joint. So we are planning to buttering both nozzle and tube sheet nozzle opening with Inconel. Then Butt weld the joint with Inconel.
We have one overlay procedure (SMAW) with Inconel on P4 material with PWHT and another butt welding procedure for Inconel to Inconel (GTW+SMAW) without PWHT.
Can I use these PQR together for this butt weld?.
Or I have to qualify a new buttering+buttwelding PQR with same condition?.
Thanks & Regards
Muhammed Ibrahim PK
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Thanks & Regards
Muhammed Ibrahim PK
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