Materials & Welding

Dear friends   The Indian Institute of Welding, Mumbai branch cordially invites you for a One Day Refresher Course on:   " WELDING TECHNOLOGY "   On SATURDAY, 20th July 2013 (9.45 am - 5.15 pm) At  DON BOSCO MARITIME ACADEMY Premier Automoblie Road, (West side of Vidyavihar Rly. Station), Kurla, Mumbai, India     Please Refer attached file for more details. Thanks & Regards,  Prem S Nautiyal IIW - Mumbai Branch Mobile     +91-9769316004

Dear Sandeep: Cooling after welding is quite fast and when temp drops below Martensite Finish (M f ), it retards the transformation of austenite to some extent. SR is very similar to tempering and will help transformation of Retained Austenite (RA) and improves dimensional stability and soft spot issues. Of course this RA comes out in Alloys with more than 0.3% Carbon content but it may happen in low carbon grades too. Read the following article, you will get the idea. Regards Ramin Kondori Sr. QA/QC Engineer SINOPEC r.kondori@petroyada.com +98-2123592322 +98-9132150320 On Sun, Jun 30, 2013 at 4:35 PM, sandeep monody < smv.monody@gmail.com > wrote: Dear Ramon Kondori Sir. Earlier I was believing  the same what you wrote in the reply. Regarding the 3rd point u mentioned needs more clarification.,because no microstructure changes during pwht as pwht temperature is below the lower critical temperature of the metal but brittleness/hardness chang...

Dear Ramon Kondori Sir. Earlier I was believing the same what you wrote in the reply. Regarding the 3rd point u mentioned needs more clarification.,because no microstructure changes during pwht as pwht temperature is below the lower critical temperature of the metal but brittleness/hardness changes. Please clarify your 3rd point Sandeep.M.V -- 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 Gr...

Dear Sandeep: A few things happen with Stress Relief: residual stress makes every thing brittle. Metals are more tough when they are not in tension and weldments always have residual stress at levels close to yield point. SR will temper the microstructure. This tempering like quench & temper steels, have a possitive effect on toughness and reduces brittleness. SR helps residual austenite transform to ferrite. This improves toughness. SR will reduce Hydrogen level in the weldment. Hope you get the idea... Regards Ramin Kondori Sr. QA/QC Engineer SINOPEC r.kondori@petroyada.com +98-2123592322 +98-9132150320 On Sun, Jun 30, 2013 at 3:24 PM, sandeep monody < smv.monody@gmail.com > wrote: Dear sir Thanks for your reply and I understand your explanations. But now please clarify how does the brittleness changes after pwht? I think no physical properties will change without change in chemical properties. Sandeep.m.v -- To post to thi...

Dear sir Thanks for your reply and I understand your explanations. But now please clarify how does the brittleness changes after pwht? I think no physical properties will change without change in chemical properties. Sandeep.m.v -- 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, ...

It means the reinforcement must be greater than the pipe surface n less than 1.6 mm. If it is greater than 1.6mm u can grind it for a little circumferential length, but normally the client will not allow..n itz not a good practice too..so insist the welders to weld with a reinforcement below the specified. Binu valiyaveedu On 29 Jun 2013 13:01, "anhtrangnghieng" < anhtrangnghieng@gmail.com > wrote: Dear Experts,   I am working to fabricate tie-in spools for pipeline and applicable standard is API 1104 As per API 1104:   7.8.2 Filler and Finish Beads : At nopoint shall the crown surface fall below the outside surface ofthe pipe, nor should it be raised above the parent metal bymore than 1/16in. (1.6 mm).   This means : Weld metal: the external reinforcements must not exceed the indicated dimensions ( 1.6 mm) /therefore,  if external reinforcement exceed 1.6 mm, The external reinforcement must be removed to below 1.6 mm as API 1104 r...

Dear sir, I can't understand your query. what is  1.3 Grades?? On Sat, Jun 29, 2013 at 12:58 PM, B R Meghwal < br.meghwal@fernas.co.in > wrote: Dear Member(s), Please clarify the clause of API 5L (1.3 Grades) as mentioned ' Pipe manufactured as Grade X60 or higher shall not be substituted for pipe ordered as Grade X52 or lower without purchaser approval .' Why  purchaser approval required???? Your kind opinion with justification will be highly appreciated.   Thanks & regards, B.R.Meghwal Dy. Manager-QA/QC (ASNT Level 3,AWS-CWI & CSWIP3.1) FERNAS Construction India Pvt. Ltd. (A wholly owned Subsidiary of FERNAS Construction Company Inc., Turkey) Cyber Terrace, 16th Floor, Tower – B, Building No. 5, DLF Cyber City, Phase – 3 Gurgaon – 122 002, Haryana, INDIA. ( : +91 124 4937984        (M) : +91 8860651934 Life is not about what you couldn't do so far, It's about what you still can........... ...

Hi Your grouping is ok. Further Refer ASME IX - QW440/QW442 for weld metal deposite i e A No. This will help you to ASME specification i e  SFA Number selection refer QW432 ( Example if material is carbon steel Refer chapter SFA5.1 Table 7 in ASME II part C matching chemical composition of feller metal) Regards Rakesh Kasera From: ajmlouis <ajmlouis@gmail.com> To: materials-welding@googlegroups.com Sent: Tuesday, 25 June 2013 6:52 AM Subject: Re: [MW:18036] Reg: ASME P Numbers Clarification ASME P-Numbers To reduce the number of welding and brazing procedure qualifications required base metals have been assigned P-Numbers by the ASME BPVC.  Ferrous metals which have specified impact test requirements have been assigned Group Numbers within P-Numbers. These assignments have been based on comparable base metal characteristics, such as:       Composition       Weldabili...

Dear sir According to the below statement, the crown shall be between 0mm -1.6 mm.which means the highest is 1.6mm. If its 1.6mm you may leave it, its not necessary to reduce the reinforcement. Thanks Raj Sent from Yahoo! Mail on Android From: anhtrangnghieng <anhtrangnghieng@gmail.com>; To: <materials-welding@googlegroups.com>; Subject: [MW:18...

Dileep Just consider @40Amps per mm of filler wire. My be between 110 to 130amps depends on passes which pass you are doing. Also see Manufactureer brand packet recommandation.   Regards Rakesh Kasera From: Dileep Sankar <dileepsan.08@gmail.com> To: materials-welding@googlegroups.com Sent: Saturday, 29 June 2013 8:40 AM Subject: [MW:18043] Welding in 3G position Dear ALL, I would like to know the best parameters to be followed for optimum result in welding an ordinary 3G joint, with E6013, 3.15mm electrode. I would like to know the preferred current (Amps) while welding both the upward and downward direction. Please help me out. With thanks in advance, Dileep Sankar dileepsan.08@gmail.com +919787090121 -- 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...

Dear ALL, I would like to know the best parameters to be followed for optimum result in welding an ordinary 3G joint, with E6013, 3.15mm electrode. I would like to know the preferred current (Amps) while welding both the upward and downward direction. Please help me out. With thanks in advance, Dileep Sankar dileepsan.08@gmail.com +919787090121 -- 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 Group...

Dear Member(s), Please clarify the clause of API 5L (1.3 Grades) as mentioned ‘ Pipe manufactured as Grade X60 or higher shall not be substituted for pipe ordered as Grade X52 or lower without purchaser approval .’ Why  purchaser approval required???? Your kind opinion with justification will be highly appreciated.   Thanks & regards, B.R.Meghwal Dy. Manager-QA/QC (ASNT Level 3,AWS-CWI & CSWIP3.1) FERNAS Construction India Pvt. Ltd. (A wholly owned Subsidiary of FERNAS Construction Company Inc., Turkey) Cyber Terrace, 16th Floor, Tower – B, Building No. 5, DLF Cyber City, Phase – 3 Gurgaon – 122 002, Haryana, INDIA. ( : +91 124 4937984        (M) : +91 8860651934 Life is not about what you couldn’t do so far, It’s about what you still can........... Lütfen bu e-postayı yazdırmadan önce çevrenizi düşünün.  | Before printing this e-mail ask y...

Dear Experts,   I am working to fabricate tie-in spools for pipeline and applicable standard is API 1104 As per API 1104:   7.8.2 Filler and Finish Beads : At nopoint shall the crown surface fall below the outside surface ofthe pipe, nor should it be raised above the parent metal bymore than 1/16in. (1.6 mm).   This means : Weld metal: the external reinforcements must not exceed the indicated dimensions ( 1.6 mm) /therefore,  if external reinforcement exceed 1.6 mm, The external reinforcement must be removed to below 1.6 mm as API 1104 required.   Please help me to clarify this doubt/   Thanks/ -- -- 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...

Sandip, PWHT is a broad based term which applies to all welds. For C.S and LAS the PWHT's involved in common fabrication are :- Normalizing -- the heating temperature is typically above upper critical temperature AC3 Annealing - heating temperature is typically close to lower critical temperature AC1 Stress relieving- most common for all fabrications in C.S and LAS. Heating temperature is well below the subcritical temperature. Look at UCS-56 for the recommended temperature ranges for various C.A and LAS. The first two heat treatments causes changes of microstructures and while the Stress Relieving does not.   The intent of any is PHD  is  to  improve resistance to brittle fracture. Stress Relieving  in particular  attempts to improve notch toughness and relax residual stress.   Residual stresses are generated due continuous heating and cooling cycle involved during welding. It is th...

Dear experts., Recently I came to know that PWHT does not change the micro structure of weld seam or HAZ. Please reply me regarding metallurgy of PWHT of weld seam and HAZ in C.S and low alloy steel. Please clarify why PWHT required for C.S and low alloy steel. What is residual stress? How do we remove residual stress during PWHT? Sandeep.M.V QA/QC Engineer -- 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 subscri...

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