Materials & Welding: RE: Re: [MW:29703] ER70S-2 and ER70S-6 (GTAW Process)

Monday, June 10, 2019

RE: Re: [MW:29703] ER70S-2 and ER70S-6 (GTAW Process)

Enough already. Assuming that only ASME Section IX applies; i.e. you are designing and fabricating per ASME I, VIII, B31.1 etc.

OK, just for grins, let's take a look at GTAW Essential variable QW-404.5, "A change in A-Number", at least in part.

"QW-404.5 (Applicable only to ferrous metals.) A change in the chemical composition of the weld deposit from one A‐Number to any other A‐Number in Table QW-442. Qualification with A‐No. 1 shall qualify for A‐No. 2 and vice versa. The weld metal chemical composition may be deter-mined by any of the following:

(a) For all welding processes —from the chemical analysis of the weld deposit taken from the procedure qualification test coupon.

(b) For SMAW, GTAW, LBW, and PAW — from the chemical analysis of the weld deposit prepared according to the filler metal specification, or from the chemical composition as reported either in the filler metal specification or the manufacturer's or supplier's certificate of compliance. . . . "

The A-Number may be assigned by the filler metal specification BUT it is not necessary to. The A-Number can also be determined on the basis of the actual weld deposit chemistry. Hence, if you specify that your ER70S-6 must comply with the A-Number 1 chemistry limits (and you actually do so) then absolutely, yes, you may substitute the ER70S-6 for ER70S-2.

This clearly is wholly separate from any other specifications applied by the customer which may impose additional limits on variables not controlled by ASME.

Enjoy.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kannayeram Gnanapandithan
Sent: Friday, June 07, 2019 3:42 AM
To: materials-welding
Subject: Re: Re: [MW:29700] ER70S-2 and ER70S-6 (GTAW Process)

Since u r using 100% Argon, Deoxidation will not take place due to shielding and not much reduction in Mn & Si to match Ano 1 as per ASME IX. If u use active gas , u can.

So u can not write in WPS for 70S6

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE, CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer.

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Fri, Jun 7, 2019 at 2:02 PM muneebslsa@gmail.com <muneebslsa@gmail.com> wrote:

Folks,

Thats great discussion, only two gents explained very neatly (John Henning & Zeghanu Gigi), however lets see explicit comparisons as per below items,

1) you cannot evade or elude QW-404.5 when you qualify your WPS per ASME IX in which QW-442 must follow with regards to ferrous metals.

2) SFA 5.18, all F-Nos are classified as F6, that doesnt mean that you can pull the trigger for all fillers, why? refer Item 3 and 4 for simple ex between sujected fillers ER-70S-2 vs ER-70S-6.

3) ER-70S-2 (Mn 1.40 Max & Si 0.70 Max) Vs ER-70S-6 (Mn 1.85 Max & Si 1.15 Max)

4) Vs QW-442 (A-No-1) Mn 1.60 Max & Si 1.0 Max.

Concluding that if you have qualified PQR ER-70s-2 and you want to use ER-70s-6 which exceeds 1.60 Mn & Si 1.00 above then you are deemed to qualify a new PQR as it exceeds A-no 1 requirements, however if composition falls below item no 4 with in A-No-1, then you can use without any doubt.

Moreover SA has approved ER70s-6 for sour service with restrictions and mandates change in A-no1 to 2 with requalification for sour as for non sour not mandated 100% requalification irrelavant of ASME IX QW-404.5 (b) but with review and further acceptance.

So for the folks saying simply yes without a reason or simply no without a reason or no with reason is disagreed on the basis of my explanation / proof / references.

Hence ER70s-6 can be used as per above consequences , you can accept the facts or deny but dont cling on your perception or level of understanding.

Regards,

Mohamed Muneeb Mahaboob,

+628-5959-11-3441

+91-786-700-444-6

TPI-BV.

''Sculpt the art you know - come what may''

From: nithindsilva4u

Date: 2019-06-06 22:34

To: materials-welding

Subject: Re: [MW:29688] ER70S-2 and ER70S-6 (GTAW Process)

Dear All,

Request you to go through the query properly before you reply. Also do not reply if u are not clear about it. Else it will lead to confusion.

A no is essential variable for WPS/PQR. Irrelevant of impact requirements. A no of ER 70S-2 and ER 70S-6 will never match. Hence you need to go for new PQR.

Sent from my iPhone

On Jun 4, 2019, at 10:43, pradip kumar Sil <pradipsil@gmail.com> wrote:

Yes You can, Both "F" no are same

On Tue, Jun 4, 2019 at 10:50 AM 'HENNING John' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Yes you can. However, if your WPS states that the filler metal per essential variable QW-404.5, will meet the Table QW-422 A-No. 1 chemistry limits, you will have to note that the Mn and Si must be 1.60 and 1.0 or less respectively. You need to do incorporate this restriction as the SFA classification permits ER70-S6 to exceed the A-No. 1 limits

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of K K
Sent: Monday, June 03, 2019 5:40 AM
To: Materials & Welding
Subject: [MW:29673] ER70S-2 and ER70S-6 (GTAW Process)

Dear All,

My PQR is qualified with ER70S-2.

Can I use ( Mention) ER70S-6 in WPS.

Regards

Kiran

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