Materials & Welding

    Hi!   For Burn Through in SMAW, when the material being welded is too thin while using bigger diameter electrode than what is required. For automatic welding, machine malfunctions may cause Burn Through like when machine travel or object being welded stops suddenly while there is continuous welding process. Also, for those requiring tack welds, when there is insufficient weld prior to full welding.   Thanks. From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of manoj john Sent: Friday, December 31, 2010 2:00 PM To: materials-welding@googlegroups.com Subject: Re: [MW:9042] reason for burnthrough defect   Dear Sankar,   The following are the main reason for burn through:   1.  Very slow travel speed and high current. 2.   High heat input. 3.   Large root opening. 4.   Uneven root face. 5.   Uns...

Refer Para 4.1 (i) of UOP Spec 3-12-5 (Pressure Vessels – Low Alloy Steels) states, the tempering temperature for tempered material shall be at least 50 ºF (28 ºC) greater than the maximum intermediate or post weld heat treatment temperature.   Also if you refer note (a) of table 5 - API 582, which states that for QT or NT materials, the PWHT holding temp shall be at least 15° C below the original tempering temperature of the base metal unless the fabricator demonstrates that mechanical properties can be achieved at a higher PWHT temperature and holding time.   Regds/Jignesh   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of asad azmi Sent: Friday, December 31, 2010 5:34 PM To: materials-welding@googlegroups.com Subject: Re: [MW:9040] Tempering Temp - IBR Cr-Mo Forged Steel valves   can you pls provide UOP para( Extract) which states  --      ...

refer UOP # 3-12-5 para 4.1.i. The tempering temperature for tempered material shall be at least 50 ºF (28 ºC) greater than the maximum intermediate or postweld heat treatment temperature. On Fri, Dec 31, 2010 at 5:33 PM, asad azmi < azmiasadayub@gmail.com > wrote: can you pls provide UOP para( Extract) which states  --      Tempering temp shall be 28 °C higher than PWHT temp)     Regards On Thu, Dec 30, 2010 at 12:58 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: IBR regulation 282a: states tempering temperature for P11 shall be 620-660 °C and for P22 it shall be between 650-700 °C. Whereas Minimum PWHT temperature for B31.3 piping is 704 °C, when we restrict the min tempering temp to (e.g. 730 °C), forging vendors are denying to meet the requirement (e.g. welded valves), quoting IBR regulation 282a. However there is a note at the end "The tempering temperature may be varied by the Inspecting Authority to suit the steel being tempe...

can you pls provide UOP para( Extract) which states  --      Tempering temp shall be 28 °C higher than PWHT temp)     Regards On Thu, Dec 30, 2010 at 12:58 PM, Bathula Raghuram (Mumbai - PIPING) < R.Bathula@ticb.com > wrote: IBR regulation 282a: states tempering temperature for P11 shall be 620-660 °C and for P22 it shall be between 650-700 °C. Whereas Minimum PWHT temperature for B31.3 piping is 704 °C, when we restrict the min tempering temp to (e.g. 730 °C), forging vendors are denying to meet the requirement (e.g. welded valves), quoting IBR regulation 282a. However there is a note at the end "The tempering temperature may be varied by the Inspecting Authority to suit the steel being tempered". My question is had anybody approached in the past and able to convince IBR for higher tempering temperatures? Q: how forging vendors are meeting this requirement when PWHT temperature shouldn't exceed tempering temperature (for e.g. UOP states tempering temp sh...

Pradip,   I hope that you are aware that E 6010/ E 7010 are cellulosic electrodes, and it is widely used,   1. for welding the root pass and or all passes of single sided welds, most of the time for pipelines and flowlines welding. 2. for welding root pass of pipings under B31.3 scope, but with caution of slag on the root side. 3. To achieve a full penetration weld, the cellulosic electrodes produce a forceful spray type arc, which you not be able to achieve with a E7018 electrode due to its reletively soft arc.   the reason why E6010 is selected for root pass welding is mainly due to above mentioned facts and also you should note that E 6010 welds are deposited with downhill progresion, that means you'll only be depositing only a very thin root pass. this thin root pass doesnt contribute more from the design / strength point of view. more over the dilution of root pass by the adjacent base materials and the subsequent penetration of the hot pass w...

Dear Sankar, The following are the main reason for burn through: 1.  Very slow travel speed and high current. 2.   High heat input. 3.   Large root opening. 4.   Uneven root face. 5.   Unskilled welder or welding operator. Thanks & Regards. Manoj On Thu, Dec 30, 2010 at 7:30 PM, shankark < shankark.qc@gmail.com > wrote: we got BT defect in smaw process welding using E6010 for root, and E7018 for hotpass, capping. what could be the reason for this defect and how we can avoid it. thanks, shankar -- 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. -- To post to t...

Dear Pradip, I just saw your reaction in this topic, I don't know why but I didn't receive it in my private mail box. So therefore I didn't receive the attachments to this message you refer to. Can you please send me these documents again directly to my personal mailbox? I will ask my previous colleagues at Exova laboratory (formerly Bodycote) if one of their laboratories as experience with this G36 SCC test and CaCl2 solution. Problem is only that they have holiday because of Newyear on this moment so first possibility for that will be January 3th. Wish you all a happy New year. Best Regards Herman Pieper On 30 dec, 22:41, "pgoswami" < pgosw...@quickclic.net > wrote: > Mr.. Herman and Mr Rana, > > Attached are some documents which references Chloride SCC in CaCl2 solution. > > ASTM G-36, is a very long established standard for chloride SCC. I have > come across of some literatures reporting that MgCl2  test being aggressive > on a n...

Hi Shankar, 7010-G available with Bohler Welding .They stock it in India and approved by some major Piping contractors.   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Suresh Sent: Friday, December 31, 2010 10:39 AM To: materials-welding@googlegroups.com Subject: Re: [MW:9035] Technical solution   Hii Sankar ,   Plz check below quote from D&H  in India , E 7010 Electrode is available in Indian Market . you  can choose it .     D&H Secheron through well-built hard work in research and development will meet the various demands of our customers. Below please find a category wise kisting of our latest products.   SMAW / MMAW Electrodes Mild Steel Electrodes PRODUCT NAME AWS CODE IS CODE   CELLUTHERME - Mo E7010-G E7070-G   On Thu, Dec 30, 2010 at 6:23 PM, pradip kumar sil < pradipsil@gmail.com > wrote: Dear All, When we use GTAW , we are using  ER-70S2/E-7018( Same te...

Burn Through in your case I understand was caused with the hot pass.   It is caused by electrode diameter or excessive power, thin root, poor handling of electrode, large root gap before root pass, position of job.   Not knowing your electrode travel direction I advise you as follows.   E6010 produces a strong weld. However to minimise burn through situations, I would recommend a second pass with E6010 on vertical down travel to thicken the root, or, vertical up travel with a smaller E7018 electrode, or, weld a separate plate/pipe with the parameters that is most suitable for you, or, run a welding procedure for anyone to follow.   Hope it helps   Regards   Ariel  Tendeiro  

Hii Sankar ,   Plz check below quote from D&H  in India , E 7010 Electrode is available in Indian Market . you  can choose it .     D&H Secheron through well-built hard work in research and development will meet the various demands of our customers. Below please find a category wise kisting of our latest products.   SMAW / MMAW Electrodes Mild Steel Electrodes PRODUCT NAME AWS CODE IS CODE   CELLUTHERME - Mo E7010-G E7070-G On Thu, Dec 30, 2010 at 6:23 PM, pradip kumar sil < pradipsil@gmail.com > wrote: Dear All, When we use GTAW , we are using   ER-70S2/E-7018( Same tensile) combination, alternatively in SMAW , we are using E-6010/E-7018( Different tensile) instead of E-7010. E-7010 is not available(as per ASME) in the market. Is there any technical problem to manufacture it or to   use it. Can somebody tell it. Regards Pradip -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this grou...

E7010 IS SUITABLE FOR DOWNHILL WELDING E6010 SUTABLE FOR UPHILL WELDING On Thu, Dec 30, 2010 at 10:56 PM, < fred.schweighardt@airliquide.com > wrote: E7010 is readily available in the US from Lincoln, Esab, Hobart, and others On Dec 30, 6:53 am, pradip kumar sil < pradip...@gmail.com > wrote: > Dear All, > > When we use GTAW , we are using  ER-70S2/E-7018( Same tensile) combination, > alternatively in SMAW , we are using E-6010/E-7018( Different tensile) > instead of E-7010. E-7010 is not available(as per ASME) in the market. Is > there any technical problem to manufacture it or to  use it. > > Can somebody tell it. > > Regards > > Pradip -- 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 ...

Also find this one.     Regards, Jaydeep Joshi | TDW India Limited Plot No 16 | Phase –III | Alindra – Savli G.I.D.C | Taluka : Savli | Vadodara – 391 775 Board : +91-2667- 619900 | Fax : +91- 2667- 619501 | Extension : 7845 E-Mail : jaydeep.joshi@tdwilliamson.com   | www.tdwilliamson.com Cell: +91 9978959626 P     Before printing, Think about ENVIRONMENTAL responsibility On Thu, Dec 30, 2010 at 9:36 PM, < jignesh_rana@indiatimes.com > wrote: Hi Elumali, Thanks for quick feedback. Yes, it is corrosion test and being done at laboratory having appropriate set up. But the question is that project specification requires it as per ASTM  G 36 ,with cacl2 solution. Request to provide more information, if available. regards, jignesh rana ----- Original Message ----- From: Sundaram Elumalai To: materials-welding@googlegroups.com Sent: Thu, 30 Dec 2010 17:06:10 +0530 (IST) Subject: [MW:9021] RE: 9018] Stress Corrosion Cracking Test Hi,   This is one corrosion...

Dear Mr. Rana,   Please find the attacehd TWI report.   This may help you.   Regards, Jaydeep Joshi | TDW India Limited Plot No 16 | Phase –III | Alindra – Savli G.I.D.C | Taluka : Savli | Vadodara – 391 775 Board : +91-2667- 619900 | Fax : +91- 2667- 619501 | Extension : 7845 E-Mail : jaydeep.joshi@tdwilliamson.com   | www.tdwilliamson.com Cell: +91 9978959626 P     Before printing, Think about ENVIRONMENTAL responsibility On Fri, Dec 31, 2010 at 3:11 AM, pgoswami < pgoswami@quickclic.net > wrote:   Mr.. Herman and Mr Rana,   Attached are some documents which references Chloride SCC in CaCl2 solution.   ASTM G-36, is a very long established standard for chloride SCC. I have  come across of some literatures reporting that MgCl2  test being aggressive  on a number of  stainless steels.Hence a more moderate one e.g CaCl2 test is  followed by the industry.   Many manufacturers of duplex SS refers  to SCC in CaCl2 media. However to the best of my kn...

  Mr.. Herman and Mr Rana,   Attached are some documents which references Chloride SCC in CaCl2 solution.   ASTM G-36, is a very long established standard for chloride SCC. I have  come across of some literatures reporting that MgCl2  test being aggressive  on a number of  stainless steels.Hence a more moderate one e.g CaCl2 test is  followed by the industry.   Many manufacturers of duplex SS refers  to SCC in CaCl2 media. However to the best of my knowledge no ASTM standard cross refers CaCl2 media for chloride SCC.   Mr. Herman,if  you have more information through your association with various labs/testing facilities,may put up the updates.   Please see the extracts from G-36 on the pros and cons of MgCl2 test.   Thanks     Pradip Goswami,P.Eng. ,IWE. Welding & Metallurgical Specialist & Consultant Email-pgoswami@ sympatico.ca , pgoswami@quickclic.net   ...

Hi Shankar, Burn-through (too much penetration) is caused by having too much heat input in the weld zone. Please check the current, over current may be one reason for burnthrough. It happen when the speed is very slow so you can increase the travel speed. Burn- through  can  also  result  from  having  an  excessive amount of root opening.   regards,     Arun S Das   From: shankark <shankark.qc@gmail.com> To: Materials & Welding <materials-welding@googlegroups.com> Sent: Thu, 30 December, 2010 9:00:24 PM Subject: [MW:9023] reason for burnthrough defect we got BT defect in smaw process welding using E6010 for root, and E7018 for hotpass, capping. what could be the reason for this defect and how we can avoid it. thanks, shankar -- 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...

E7010 is readily available in the US from Lincoln, Esab, Hobart, and others On Dec 30, 6:53 am, pradip kumar sil < pradip...@gmail.com > wrote: > Dear All, > > When we use GTAW , we are using  ER-70S2/E-7018( Same tensile) combination, > alternatively in SMAW , we are using E-6010/E-7018( Different tensile) > instead of E-7010. E-7010 is not available(as per ASME) in the market. Is > there any technical problem to manufacture it or to  use it. > > Can somebody tell it. > > Regards > > Pradip -- 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 do...

Dear Mr. George Please try 15 B 25 With Regards Arijoy Roy --- On Wed, 29/12/10, Tiny <gselburg@douglasdynamics.com> wrote: From: Tiny <gselburg@douglasdynamics.com> Subject: [MW:8996] substitute AISI 4140 RC 28-32 To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Wednesday, 29 December, 2010, 9:10 PM All, I am interested in substituting a 0.75" diameter rod made from AISI 4140 RC 28 - 32, with a material of comparable strength properties but which is less sensitive to being welded, any information would be appreciated. Regards, George Selburg Jr. Sr Analysis Engineer Douglas Dynamics, LLC;  Western Products 7777 North 73rd Street Milwaukee, WI 53223 Ph-414.362.3871;  FAX-414.354.8448 email:  gselburg@douglasdynamics.com -- 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...

Hi Elumali, Thanks for quick feedback. Yes, it is corrosion test and being done at laboratory having appropriate set up. But the question is that project specification requires it as per ASTM  G 36 ,with cacl2 solution. Request to provide more information, if available. regards, jignesh rana ----- Original Message ----- From: Sundaram Elumalai To: materials-welding@googlegroups.com Sent: Thu, 30 Dec 2010 17:06:10 +0530 (IST) Subject: [MW:9021] RE: 9018] Stress Corrosion Cracking Test Hi,   This is one corrosion test need to be done at approved Lab. So you may check in your region, who is doing this test.   With Kind regards,   S.Elumalai. From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of jignesh.rana@Linde-LE.com Sent: Thursday, December 30, 2010 1:45 PM To: 'materials-welding@googlegroups.com' Subject: [MW:9018] Stress Corrosion Cracking Test   Dear Members, One of our project specification calls for Chloride ...