It is on HAZ Carbon Steel side.
Regards
Vinod
Sent from BlackBerry® on Airtel
From: praveen alavandar <praveenakds@yahoo.com>
Sender: materials-welding@googlegroups.com
Date: Sat, 5 Feb 2011 05:46:59 -0800 (PST)
To: <materials-welding@googlegroups.com>
ReplyTo: materials-welding@googlegroups.com
Subject: RE: [MW:9743] CS to SS welding
Dear Mr.Vinod, Where do u get the higher hardness? Is it on the weld or HAZ? whether it is on the root or on the cap? If possible you can attach your macro photo identfying the higher hardness location. Regards, A.Praveen Muscat
--- On Sat, 2/5/11, Vinod Kataria <vinod.kataria@blissanand.com> wrote:
From: Vinod Kataria <vinod.kataria@blissanand.com>
Subject: RE: [MW:9740] CS to SS welding
To: materials-welding@googlegroups.com
Date: Saturday, February 5, 2011, 2:49 PM
Please note the required details as per the following in RED colour:- * Welding Process – GTAW for Root and Filling with SMAW.
* Thickness of the materials (Dissimilar weld ?) – 4.5mm.
* Welding Technique– String, cup size 6mm, multipass, single electrode.
* Preheat temp. – 20 degree C min.
* Heat Input– 0.95 to 1.19 KJ/mm.
With kind regards, Vinod Kumar Kataria GM - Operations Bliss Anand Private Limited, 92B/93B Sector 5 IMT Manesar,Gurgaon, National Capital Region Delhi. India . Phone : +91-124-4366000 (9 Lines) Mobile Phone : +91-9560199004 Fax : +91-124-2290884 From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manpreet
Sent: Saturday, February 05, 2011 7:58 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:9737] CS to SS welding Dear Vinod,
Ok then, I would like you to provide some more info.
* Welding Process
* Thickness of the materials (Dissimilar weld ?)
* Welding Technique
* Preheat temp.
* Heat Input
Changes may be required for above stated factors (in lieu of PQR) to overcome this problem.
Regards
Manpreet Singh
On Sat, 05 Feb 2011 01:15:21 +0530 "Vinod Kataria" wrote
> Dear Manpreet, Thanks for your valuable time. Please note we have qualified PQR using Filler 309L only but so many time we are getting more than 22 HRC which is not acceptable as per Nace MR 0175. With kind regards, Vinod Kumar Kataria GM - Operations Bliss Anand Private Limited, 92B/93B Sector 5 IMT Manesar,Gurgaon, National Capital Region Delhi. India . Phone : +91-124-4366000 (9 Lines) Mobile Phone : +91-9560199004 Fax : +91-124-2290884 From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manpreet
>Sent: Friday, February 04, 2011 3:17 PM
>To: materials-welding
>Subject: Re: [MW:9727] CS to SS welding Dear Vinod,
>
>When welding Carbon steel to stainless steel, one should avoid formation of martensite by using overalloyed filler metal (309L) which willformAustenite even when cooling,a Preheatingand using Temper bead technique would also be helpfull to reduce Hardness,
>
>Considerationmust be given to reduce High Dilution by reducing Travel Speed, buttering the joint face, no SAW etc.
>
>Also refer to the Shaeffler Diagram to evaluate what kind of microstructue you would expect, with filler metal E309L, you can expect "Austenite with little ferrite".
>
>Regards
>Manpreet Singh
>
>
>
>On Fri, 04 Feb 2011 13:18:26 +0530 "Vinod Kataria" wrote
>> Hi, How to control the hardness for NACE MR 0175 application if we have to use A-105 flanges on SS-316 Chamber as PWHT cannot be done. With kind regards, Vinod Kumar Kataria -- >>To post to this group, send email to materials-welding@googlegroups.com >>To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com >>For more options, visit this group's bolg at http://materials-welding.blogspot.com/ >>The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. >> >  --
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>The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. --
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