Materials & Welding: RE: [MW:31260] Combination of PQRs

Sunday, August 2, 2020

RE: [MW:31260] Combination of PQRs

Hello Prasad,

As per ASME Sec-IX you may use the qualified WPS on alloy 825 for welding alloy 904L. Both of these alloys are classified as P No 45. However if the welding requirements are strictly as per Sec-IX , then this welding would be allowed, provided the welding consumables/filler metals for welding alloy 825 and 904L are the same(unchanged).

For welding 904L to 317SS with ER 385 a new PQR should be qualified.

· A snapshot of 904L(UNS 08904) , as per Sec-IX,

· A snapshot of 825 (N08825) , as per Sec-IX,

Although the chemistry is widely different, both alloys are used for extremely corrosion resistant/demanding applications. Hence choosing welding electrodes/fillers, matching the base metal chemistry would ususally be advisable. The A No & F No of both ERNiFeCr-1 & ER-385 are doffernt. This is an essential variable as per Sec-IX. Hence requalification would be required if the welding consumable/filler is changed.

An extracts of the composition of both type of filer metals are as attached. As you may see ERNiFeCr-1 is richer with respect to the alloying elments, as compared to ER 385. Hence using this filer for welding 904L should not be a problem with respect to chemistry and mechanical properties. However one has to know the service environment/corrosivity for the correct filler/elelctrode selection.

What is the service environment, phosphoric acid or something else?

One advise please do not mix the queries, the original query posted was on different topic. Please take a little more effort to create a new topic and post your query.

Thanks.

P.Goswami.P.Eng, IWE.

Independent & Consulting Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@rogers.com,pradip.goswami@gmail.com

Cell/Whasapp:1-905-9793232

From: 'Zeghanu Gigi' via Materials & Welding <materials-welding@googlegroups.com>
Sent: August 2, 2020 3:15 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:31254] Combination of PQRs

Good morning,

Dear Ramon as Metallurgical Engineer ,are you so kind to give us your opinion related the microstructure, mechanical properties affected if austenitic SS 904 is welded with ER NiCr,ER NiFeCr(SFA-5.14 filler metal)?

Seems to be interesting.

Regards

Gigi

On Sunday, 2 August 2020, 07:30:50 EEST, Customer Care <bricenori@hotmail.com> wrote:

Dear Prasad,

It seems to me that your proposal is not valid because the INCOLOY 825 alloy belongs to the family of nickel base alloys with filler metal within SFA 5.14. (for example ERNiFeCr-1).

904 L is a high alloy austenitic stainless steel and must be welded with filler metal of the same composition within SFA 5.9 (ER385) and also to weld the SS 317 / 904L combination.

You should prepare WPS with PQR for this 904L alloy.

Regards,

Ramon Briceno / Metallurgical Engineer -Oil & Gas

www.linkedin.com/in/ramon-briceño-976265b5

Sent from Mail for Windows 10

From: prasad loke
Sent: Saturday, August 1, 2020 7:20 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:31251] Combination of PQRs

Dear Sir,

Greetings !

We are in need your expert opinion on following issue,

We have WPS/PQR for Incolloy 825-Incolloy 825 ( P number 45)----Filler used for same is from SFA 5.14

Now We have a requirement of SS904L to SS904L welding.( P number 45)---Where recommended filler is ER385 with SFA 5.9

If we make WPS with filler from SFA 5.14 for this (SS904L to SS904L) welding as P number is same, can it be supported with existing PQR of Inc-825 to INC-825 ?

Thanks in advance.

Regards

Prasad Loke

On Mon, Jul 27, 2020 at 1:03 PM K K <karan.hbl@gmail.com> wrote:

Hi Experts,

"Good Morning"

According to my line classes, I required NACE+HIC+PWHT Wet H2 services.
What is the test shall be conducted according to the standard to meet the requirements?

I have one PQR with NACE+PWHT+Wet H2S services, but not HIC test.
In addition, I have qualified one HIC tested PQR without PWHT no other lab test certificates, shall I combined this PQR to the above requirements( NACE+HIC+PWHT+wet H2S).
For your information, the HIC test is an additional requirement of our specifications.
Please looking your feedback on my above query.

Thanks and Regards
Kiran
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