Materials & Welding

Hello Expert,  I am seeking your technical advice in terms of Welding process. For welding of crane girder  we are using SMAW welding with root and hot pass DPT.  Now people want to change the welding process from SMAW to GMAW. (but root with SMAW) Plate thickness ranging from 25 mm to 50 mm. Please give your advice,  Your prompt action will be highly appreciated Regards Aakash -- 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 mess...

Both are very similar with min. yield stress of 50ksi (50T has higher range though 50-80ksi compared to 50-75ksi of 50). See more here Cheers ChemKB On Thursday, July 24, 2014 3:44:01 AM UTC-5, prabuharan marimuthu wrote: Hi all,  May someone clarify me what are the difference between API 2W 50 and API 2W 50T because both of them looks similar to me. 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 subscrib...

Dear Sir, I have to do PWHT after explosive bonding and some portion overlay welding in heat exchanger. We have to do overlay and weld cladding of SS 304 on SA 336 Gr. F5. PWHT heating cycle is 720 C at 2 hours.   Material : SA 336 Gr F5 + SS 304 CLAD now my doubt is if we will do PWHT in sensitization range so that there is chance of IGC in SS material and SS clading will not fulfill its corrosin resistance purpose. so kindly pls suggest we can do or not do??? Thanks, Hemant Suthar 7600096712 Get your own FREE website, FREE domain & FREE mobile app with Company email.   Know More > -- 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 vie...

Thank you all for your advice. I forgot to mentioned that I have been handled a very small sample of each type of material. Therefore, destructive tests are out of the question. Would you gentlemen say, PMI and hardness test could provide sufficient data to determine what grade of material those samples are likely to be? Best regards, Tim On Wednesday, July 30, 2014 1:57:22 PM UTC+8, Tim Lim wrote: Esteemed Group Members,   If you are handed a sample material cut out. What tests would you order to determine its quality?   Best regards, Tim   -- 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 vie...

Dear Kumar, after your question, many have commented and asked you some clarifications. kindly respond to keep the spirit of knowledge sharing. even if you have solved the issue , share it. good luck to all. On Friday, July 25, 2014 10:28:27 AM UTC+3, sunilkumar kundothara wrote: Dear all, During the hydrotest of a product line of about 1.3 km (asme B31.3/4, 24 bar test pressure, 4 hour holding time), 2 blind flanges are given at each end. One of the flanges were found as leaking (as drops) upon inspection. Around 15 mtr. Of the line in between is underground and hidden as well. Sub-contractor is arguing that line has a pressure around 27 bar (due to temp.) Which is above test pressure thus can be accepted. They are saying code allows "blind flange leakage" also. Anyhow we are not agreeing for that. Expecting your valuable feedback on this issue. Thanks in advance, Kumar. -- To post to this group, send email to materials-welding@googlegroups.com To unsub...

its depend whethet CRO done for strength purppse or corosion purpose. for strength req for corrosion not req. -- 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/d/optout .

would you pl attaced pdf of this interpretation. interpretation 1-62 subject 336.5, Types & Extent of required examinations date issued 1982 june 9 file number 1578 Please look for answers in code interpretation questions. Q-1,2,3 -- 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, ...

1.metallography 2. PMI 3. hardness 4.micro hardness. -- 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/d/optout .

Dear Kim ,            Based on your requirement basic  and simple test  is  chemical analysis from which you can know the elements present in material.  If  you wanted to know mechanical properties need to carry out tesile, Izod Etc.   Regrads.   Manjunath T Madiwalar. On Wed, Jul 30, 2014 at 11:27 AM, Tim Lim < th.lim@synchonghoe.com > wrote: Esteemed Group Members,   If you are handed a sample material cut out. What tests would you order to determine its quality?   Best regards, Tim   -- 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 mu...

Dear It is Company Specifications or Standards Requirements. Just to Evaluate the Quality of Weld in Production Process. Which are not Counting for the % criteria for the production weld NDE. Thanks & Regards PRADEEPKUMAR HORMIS Lead Welding Inspector, JACOBS, Chem-1(Chlorine & Brine Project) Mob. 0551682908       On Mon, Jul 28, 2014 at 7:25 AM, Kannayeram Gnanapandithan < kgpandithan@gmail.com > wrote: This is for initial qualification of welders THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Sun, Jul 27, 2014 at 7:06 PM, Sahavas v s < sahavas143r@gmail.com > wrote: Hello,   As per QW-301.2 need production joint and as per QW-304.1 minimum 150mm length of the first production weld(s) made by welder may be examined by volumetric NDT.     On Friday, July 25, 2014 8:46:14 AM UTC+3, S.Mohammed wrote: Dear all Is there any where mentioned in ASME that we have to take initial prodution...

Lack of fusion: base metal not melted. Why? Because base metal temperature did not achieve 1510 degC. Why? Because heat input not adequate (forget high or low). You may use  a high heat input welding method (per definition) and you may still get lack of fusion. With GMAW it happens mainly because the welder "runs" too fast in order to achieve high productivity rates. You do not wonder why many EPC specs do not allow GMAW either for pressure equipment or for critical structural steel? Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Kannayeram Gnanapandithan [kgpandithan@gmail.com]   Sent: 07/30/2014 09:15 AM ZE5B   To: materials-welding <materials-welding@googlegroups.com>   Subject: Re: [MW:21489] WPS of SS 304L Incomplete fusion is due to less Heat input?? not because of voltage. mainly depend on current and other factor also THANKS & BEST REGARDS KG.PANDIT...

Dear Tim, Do both the Mechanical and Chemical analysis as per the Mill Test Certificate. Muthusamy . S அமீரகம்  On 30 July 2014 09:57, Tim Lim < th.lim@synchonghoe.com > wrote: Esteemed Group Members,   If you are handed a sample material cut out. What tests would you order to determine its quality?   Best regards, Tim   -- 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 subsc...

Esteemed Group Members,   If you are handed a sample material cut out. What tests would you order to determine its quality?   Best regards, Tim   -- 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 ...

Incomplete fusion is due to less Heat input?? not because of voltage. mainly depend on current and other factor also THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Tue, Jul 29, 2014 at 7:42 PM, < george.dilintas@gr.bureauveritas.com > wrote: ...and you get frequently luck of fusion Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Kannayeram Gnanapandithan [ kgpandithan@gmail.com ]   Sent: 07/29/2014 02:07 PM ZE5B   To: materials-welding < materials-welding@googlegroups.com >   Subject: Re: [MW:21487] WPS of SS 304L voltage depends on Arc length , manual welding ( constant current), it varies with welder to welder and u can preset the voltage before start welding but u can set amps,, but in GMAW, u can preset voltage and separately and Arc length will be always constant because it is Constant Voltage/Potential Power source THANKS ...

...and you get frequently luck of fusion Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Kannayeram Gnanapandithan [kgpandithan@gmail.com]   Sent: 07/29/2014 02:07 PM ZE5B   To: materials-welding <materials-welding@googlegroups.com>   Subject: Re: [MW:21487] WPS of SS 304L voltage depends on Arc length , manual welding ( constant current), it varies with welder to welder and u can preset the voltage before start welding but u can set amps,, but in GMAW, u can preset voltage and separately and Arc length will be always constant because it is Constant Voltage/Potential Power source THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Tue, Jul 29, 2014 at 1:46 PM, < george.dilintas@gr.bureauveritas.com > wrote: In GTAW the arc is 10 to 15 Volt. In the other processes the arc is much higher. In GMAW a very skilled welder may achiev...

voltage depends on Arc length , manual welding ( constant current), it varies with welder to welder and u can preset the voltage before start welding but u can set amps,, but in GMAW, u can preset voltage and separately and Arc length will be always constant because it is Constant Voltage/Potential Power source THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Tue, Jul 29, 2014 at 1:46 PM, < george.dilintas@gr.bureauveritas.com > wrote: In GTAW the arc is 10 to 15 Volt. In the other processes the arc is much higher. In GMAW a very skilled welder may achieve 20 Volts.  The Amps depend on the diameter of the rod and the speed on the ability of the welder who in this process has a very good control of the pool which crucial for the heat input.  The overall  efficiency may be low but if the lost energy is not dissipated in the weld pool it is not contributing to the heat input in the weld Best regards Dr Georgios Dilintas Authori...

In GTAW the arc is 10 to 15 Volt. In the other processes the arc is much higher. In GMAW a very skilled welder may achieve 20 Volts.  The Amps depend on the diameter of the rod and the speed on the ability of the welder who in this process has a very good control of the pool which crucial for the heat input.  The overall  efficiency may be low but if the lost energy is not dissipated in the weld pool it is not contributing to the heat input in the weld Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Mohit Aggarwal [aggarwalmohit05@gmail.com]   Sent: 07/27/2014 09:16 PM ZE5B   To: materials-welding <materials-welding@googlegroups.com>   Subject: Re: [MW:21481] WPS of SS 304L Dear Sir, How GTAW is lower heat input process in which small dia. Wire use high current with low speed!! Please clarrify my doubt. Best Regards, Mohit Aggarwal. On 27-Jul-2014 2:27 PM, <...