Materials & Welding

ER70S-2 is compatible GTAW wire to be use with Ar gas only. Where as -6 is compatible GMAW wire generally use with CO2 GAS. Si n Mn has to add as deoxifizers to eliminate effect of O2 from weld pool. Regards, Maulik Welding engg. And metallurgy Larsen n toubro Surat On Nov 26, 2012 3:37 PM, "Vinu Raveendran" < vinuravi007@gmail.com > wrote: Dear Members, I would like to know difference between ER70S2 &ER70S6? What does "2" and "6" mean in them and which welding process we use them? Thankyou!  -- VINU RAVEENDRAN -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   The views expressed/exchnaged in this group ar...

Dear Experts Hi Is There any standard WPS for SMAW Carbon Steel to Austenitic Stainless according to EN ISO or AWS standards? ( st 37 to a304 , THK: 10mm , V Groove) If yes do send me the document NO. . Thank you -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to mat...

Hi Saravanan,   Mixed gases are always better options for FCAW of DSS than pure(100%) CO2 shielding. Please read through API-TR-938C, Clause 4.4 and other clauses for guidance. Also you may refer the attached link for guidance also.  Some of the potential risks of 100% CO2 shielding are :- poor toughness higher hardness  in the weld and HAZ meeting corrosion test requirements. Usually DSS is always chosen for demanding applications. Hence the welding consumables and the shielding gases have to be of "quality product".Or else failure in welding test or  in service are inevitable.   If 100% CO2 shielding meets all of your project requirements, PQR qualification, radiographic consistency, lower weld defect rates then it's worth trying . Otherwise saving a few "bucks" here and there" may mean bigger headaches at  the end. Usually for offshore projects and especially with DSS, clien...

Dear Welding and Metallurgy Experts, With ref. to the below mail , in most of the welding consumable manufacturer's recommendation like SandVik, Metrode, FCAW duplex filler for the material UNS 31803, to be done with Argon 75 to 80 % and rest by Co2 shielding gas for optimum results. Are there any potential risks , corrosion problems Or SCC arises during process in Oil Gas, refineries and other plants, when we use FCAW with 100% Co2 shielding gas ?  Because we are going to propose to our client with 100% Co2 shielding gas for FCAW ( Duplex S31803 material ) , for Production Coolers of GAS development Project. The fluid inside the header boxes are Hydrocarbon and its condition is Vapor & Liquid mixed. If you have such records, please do share with me. Regards, Saravanan Korea On Mon, Dec 16, 2013 at 2:15 AM, c sridhar < sridhar305@yahoo.com > wrote: Welding duplex material UNS 31803 TIG welding is usually performed with pure argon as the shielding ga...

  In the first part - ER 70S-6 & ER 70S-2:       S-6: contains very high Manganese & Silica content which will act as de-oxidizers and could              be used along with CO 2 as shielding gas. Radiographic quality of weld is not mandatory.        Recommended for GMAW (MIG & MAG) process.   S-2: contains limited amount of Mn & Si, but has additional elements like Zn – Al – Ti, which will        act as deoxidizers and could be used along with Argon ( or) with Ar (+) O 2 as shielding gas.       100 % radiographic quality of weld is obtainable. Recommended for GTAW (TIG) process.   In the second part i.e., with ER 70S-6: The said golden spots are nothing but non-metallic slag spots, caused by the reaction of excessive Manganese (Mn) used as a de-oxidiz...

Dear friends,             Kindly differentiate the Hydro Cyclic Test and Hydro Fatigue Test.   Thanks&Regards,   B.Sudharsanam Design Department Goodrich Gasket Private Limited Ph.No.+91 7299048721 Ph.No. +91 9551354411, +91 9551283311,Ext.No.221 Tel.+91-44-27498033 Fax: +91-44-27498055 Email Id: mij@flosil.com Web: www.flosil.com P Please consider our environment and think before you print. Thank you! q    

Dear Sir,   I am using ER70S-6 for GMAW. But found golden spots after welding. Are these golden spots Silicon Oxide or somthing else. These golden spots causes problem during paint as its a not metal it is not covered in CED bath. I always found these spots more brighter after the paint baking.I want to eleminate this probem.   So can i switch to any other wire with less silicon composition or there is any better alternate available.   Please Suggest.         On Monday, November 26, 2012 1:49:14 PM UTC+5:30, vinu raveendran wrote: Dear Members, I would like to know difference between ER70S2 &ER70S6? What does "2" and "6" mean in them and which welding process we use them? Thankyou!  -- VINU RAVEENDRAN -- 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 ...

Yes Mohammed I am planning to take API 510 in next year. Can someone guide me how to take this certification. Include application process, course material, mode and type of exam, when and where? Regards Abdul Rahoof Abu Dhabi  UAE 0505504721 On Friday, 27 December 2013, S.Mohammed wrote: Dear all,  for whom is pursuing API-570,510, from 2014 onwards API exams will be comperised and no need to carry any code books or any stuff!!! regards, mohammed. -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. applicabl...

Dear all,  for whom is pursuing API-570,510, from 2014 onwards API exams will be comperised and no need to carry any code books or any stuff!!! regards, mohammed. -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. For...

Addition to batt acharya  Nitrogen is strong austenite former, this will reduce loss of austenite during welding    Regards,  Vidhyapathi  On 26 Dec, 2013, at 12:48 pm, < Amitabha.Bhattacharya@voestalpine.com > wrote: Hi,   For reasons of simplicity & practicality, it is most common to use the same gas for both backing & shielding. However, the lowest levels of oxidation are obtained using a backing gas with mixture of Nitrogen.   The addition of up to 2% Nitrogen in a binary or tertiary gas mixture will raise the partial pressure of Nitrogen above the weld pool in GTAW root runs. This helps to control the nitrogen content in the weld. The addition of nitrogen also compensates for losses in the arc during welding of nitrogen alloyed steels.   With Regards Amitabha Bhattacharya voestalpine Bohler Welding India Pvt. Ltd. voestalpine Bohler Application Technology Centre M. +91-98 33998246 www.v...

As far as i know, the pipe diameter is nor essential neither supplementary essential for the PQR (ASME IX). Accepted in accordance with ASME IX if: -  the thickness to be welded is cover by QW-451 (PQR).  -  the  thickness to be welded is cover by QW-452.1(b) (WPQ). Regards   Joseph Faustin Mbe QA/QC Engineer TEL CMR (00237) 33129846 TEL CG (00242) 057388009 mbejoseph@yhaoo.fr BP 1155 Pointe Noire Yesterday is the pass, tomorrow is the future; and today? Today is the present, the gift: Enjoy it!   Le Jeudi 26 décembre 2013 5h28, Dominic v.k.dominic <v.k.dominic@gmail.com> a écrit : Dear Experts, We have qualified PQR test coupon dia 2.5". but WPS not mentioned diameter range qualified Contractor qualified WQT 1/2" Piping weld,accordingly welding has been done for 3/4" size pipe.   Please provide your valuable suggestion to these welding accept or reject as per section 1X. Best Regards, Dominic V.K. QA/QC-Insp...

Mr,Dominic, As per the Sec IX, diameter is not essential variable. WQT done as per the PQR. Refer QW 256 for GTAW process. I hope you satisfy.  Pramodh ramanunny Iraq badra oil feild Sent from my iPad On 25-Dec-2013, at 6:26 pm, "Dominic v.k.dominic" < v.k.dominic@gmail.com > wrote: Dear Experts, We have qualified PQR test coupon dia 2.5". but WPS not mentioned diameter range qualified Contractor qualified WQT 1/2" Piping weld,accordingly welding has been done for 3/4" size pipe.   Please provide your valuable suggestion to these welding accept or reject as per section 1X. Best Regards, Dominic V.K. QA/QC-Inspector. GAZPROM NEFT BADRA B.V. Badra Base Camp ,  Badra, Wasit, IRAQ. Mobile No  +9647823006598 . Think Quality, Safety Tomorrow. <90902168.gif> -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsu...

dear one what is thk.of pqr coupen. dia is essential for welder not for wps. regards mohd. -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm 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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . For more options, visit https://groups.google.com/groups/opt_out .

Hi,   For reasons of simplicity & practicality, it is most common to use the same gas for both backing & shielding. However, the lowest levels of oxidation are obtained using a backing gas with mixture of Nitrogen.   The addition of up to 2% Nitrogen in a binary or tertiary gas mixture will raise the partial pressure of Nitrogen above the weld pool in GTAW root runs. This helps to control the nitrogen content in the weld. The addition of nitrogen also compensates for losses in the arc during welding of nitrogen alloyed steels.   With Regards Amitabha Bhattacharya voestalpine Bohler Welding India Pvt. Ltd. voestalpine Bohler Application Technology Centre M. +91-98 33998246 www.voestalpine.com/welding   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ram Chatt Sent: Wednesday, December 25, 2013 7:49 PM To: materials-welding@googlegroups.com Subject: [MW:19720] Argo...

Dear Experts, We have qualified PQR test coupon dia 2.5". but WPS not mentioned diameter range qualified Contractor qualified WQT 1/2" Piping weld,accordingly welding has been done for 3/4" size pipe.   Please provide your valuable suggestion to these welding accept or reject as per section 1X. Best Regards, Dominic V.K. QA/QC-Inspector. GAZPROM NEFT BADRA B.V. Badra Base Camp ,  Badra, Wasit, IRAQ. Mobile No  +9647823006598 . Think Quality, Safety Tomorrow. -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   The views expressed/exchnaged in this group are members personel views and meant for educational purpos...

Dear Experts, Argon (98%) + Nitrogen (2%) gas purging  for duplex steel (S 32750 A790 P10H) material GTAW welding .what is the purpose mixing with Nitrogen (2%) , its mandatory ?  If not mixing any defects will  Occurred in welding ?     -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop r...

machining doesn't have any stress issues , if proper speed feed and depth of cut with coolant used On Mon, Dec 23, 2013 at 9:33 PM, kannayeram gnanapandithan < kgpandithan@gmail.com > wrote: machining/grinding shall induce residual stress, so if possible avoid after SR On Mon, Dec 23, 2013 at 3:10 PM, mustaffi < mustaffi@dynac.com.my > wrote: Dear Mr.Bala ,   Why it cannot  can you explain..   Practically ,machining it's concern about removed the thickness plates  after welding repair or buttering weld on surface flanges.   Regards Mustaffi Mohd   From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Bala Murugan Sent: Monday, 23 December, 2013 4:57 PM To: materials-welding Subject: Re: [MW:19698] RE:   No it was not accepted.   Thanks, Bala   On Mon, Dec 23, 2013 ...