John,
Thanks for a nice, apt answer. It was beneficial to me - all those P Nos., QW etc. It helped me catch up. I distinctly remember we qualified many welders on Plain Carbon Steels (Carbon steel as most of us tend to call is metallurgically not very correct; all steels have carbon) for welding SS job.
Rgds,
Shank
--- On Mon, 1/6/09, John Henning <jhenning@deltak.com> wrote:
From: John Henning <jhenning@deltak.com>
Subject: [MW:2296] RE: 2292] Re: about WQT
To: materials-welding@googlegroups.com
Date: Monday, 1 June, 2009, 8:06 PM
Dear Muhammed, You are missing a key provision in ASME Section IX. Look at QW-423, Alternate Base Materials For Welder Qualification. QW-423.1 states: "Base metal used for welder qualification may be substituted for the metal specified in the WPS in accordance with the following table. When a base metal shown int the left column is used for welder qualification, the welder is qualified to weld all combinations of base metals shown in the right column, including unassigned metals of similar chemical compositon to these metals." Of primary interest is the first entry in the table: Base Metals for weld qualification: P/S No. 1 through 11, P/S No. 34 and P/S No. 41 through 49 (any one of these base metals qualifies for all base metals in the following) Qualified Production Base Metals: P/S No. 1 through 11, P/S No. 34 and P/S No. 41 through 49 The welder or welding operator will be limited for the other process essential variables - see QW-352 through QW-357 (or QW-416 summary) for weldors and QW361.1 or QW-361.2 for welding operators. It is my understanding that ASME is concerned with the weldor being able to handle the assigned weld metal and deposit sound weld metal. Theoretically, the WPS has already established that the total weldment (base metal, HAZ, and weld metal) will be sound, meet Code requirements, and have adequate metallurgical properties. A customer can, of course, additionally restrict qualification in contract documents but then should also expect to pay a premium for the additional work that must be performed. Hope this clarifies this issue. John Hi sukamal, It is not possible . Please refer QW 300.3. It says the WPS shall be essentially equalent for welder qualification except for preheat and PWHT requiement. Regards, Muhammed Ibrahim
2009/5/28 Sudheer Babu <sudheerbabun@gmail.com> Yes, The welders can be qualfied using P1 materail unless other essential variables are not Changed. SB
On Thu, May 28, 2009 at 7:14 AM, Shank Vagal <nach_sam@yahoo.com> wrote: WQT aims at judging welder's ability to deposit sound weld using a given electrode/filler and the qualified process per the WPS. The material on which to deposit does not matter.
--- On Thu, 28/5/09, Sukamal Naskar <sukamalbecmet@gmail.com> wrote:
From: Sukamal Naskar <sukamalbecmet@gmail.com>
Subject: [MW:2265] Re: about WQT Date: Thursday, 28 May, 2009, 10:44 AM
According to QW-423.1 & QW-433, you can qualify the welder for P No. 1 material using F No.43 consumable. As long as your are not changing the process GTAW, the welder can be qualified , provided other essential variables of the GTAW process for the welder qualification doesn't change. Regards, SUKAMAL NASKAR WELDING ENGINEER On 5/28/09, Muhammed Ibrahim < ibratech@gmail.com> wrote: > You have to follow a WPS to qualify a welder.. Your WPS with P45 material > will not allow you to weld on P1 material. You have to qualify a Procedure > with P1 material with F43 consumable. With that procedure you can qualify > the welder. > > Regards, > Muhammed Ibrahim > > 2009/5/27 tamizazagan nagappan < tamizazagann@gmail.com> > >> >> >> I have wps for P45 material incoloy 825 UNS -08825, ASTM SB 462/464 UNS >> (N08020) NACE with filler metal F43 SFA 5..14 AWS Er-Ni-Cr-Mo-3... >> >> Is it possible to qualify the welder with A333 Gr 6 base metal with >> filler >> metal F43 SFA 5.14 AWS Er-Ni-Cr-Mo-3... >> >> >> >> -- >> TAMIL >> phone: +77023210394 >> >> >> >> >> >> >> -- >> TAMIL >> phone: +77023210394 >> >> Save a tree...please don't print this e-mail unless you really need >> toRegards >> >> >> >> > >> > > > -- > Thanks & Regards > Muhammed Ibrahim PK > > > > -- Sukamal Naskar Malaysia
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