Materials & Welding

Hi , Suryanarayanan ,   S ome cracks are common with hardfacing alloys, due to their inherently low ductility. This could be minimized by using a Ni-based barrier layer for some type hardfacing alloys (Stellite-6, 12 ).   I hope you'll find the information in the attachment as quite useful.   What's the type of hardfacing electrode used for weld deposition??   Appreciate your response.   Thanks     Pradip Goswami, P.Eng,IWE Welding & Metallurgical Specialist Ontario, Canada pgoswami@quickclic.net pradip.goswami@gmail.com http://ca.linkedin.com/pub/pradip-goswami/5/985/299   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com Sent: Saturday, August 30, 2014 9:14 AM To: materials-welding Subject: Re: [MW:21764] RE: Cracks hair line apprearing after welding hard facing electrode You mea...

please refer this clause in sec IX... QW-211 BASE METAL The base metals may consist of either plate, pipe, or other product forms. Qualification in plate also qualifies for pipe welding and vice versa. The dimensions of the test coupon shall be sufficient to provide the required test specimens. Regards suryakant  On Sat, Aug 30, 2014 at 4:14 PM, < george.dilintas@gr.bureauveritas.com > wrote: Could be done on plate Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Gopalakrishnan G [ gopal2408@gmail.com ]   Sent: 08/30/2014 01:11 AM MST   To: materials-welding@googlegroups.com   Subject: [MW:21759] Pipe to shell Welding Dear Experts I have to weld Pipe ( size DN 50 ) to Shell ( Thickness 25). Whether Welding Procedure qualification to be done on Pipe or plate? Please Specify how to qualify? Material - Pipe (ANSI B36.10) , Size - DN 50 (60.3 mm) and 5.54 mm thick                 shell ...

Thank you reply,  please clarify if i select EM12K-F7A8 for PQR what kind of problem will come   Thanks & Regards,   Mohamed On Saturday, 30 August 2014 8:58 AM, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote: F7A2-EH14 THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Sat, Aug 30, 2014 at 8:43 AM, Perumal Govindan < perumalgovindan@gmail.com > wrote: Yes you can choose the same On Friday, August 22, 2014, 'Mohamed ali' via Materials & Welding < materials-welding@googlegroups.com > wrote: > pls  ignore previous mail > > Dear Expert  > Which is Suitable consumable (Filler wire and Flux) for SA 516 Gr 70 plate for Tank welding by Automatic Girth welding, SAW process.  No PWHT. > i have suggest EM12K - F7A8, Is it correct or wrong.   > >   > Thanks & Regards, >   > Mohamed  > > -- > To post to th...

Since there is no impact test requirement QW-407.1 applies. Then since your temperature range is unaffected you do not need a new PQR. If impact test was required then you would need a new PQR since QW-407.2 applies and time range is a variable for qualification Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Ansari intekhab alam [ansari.ndt@gmail.com]   Sent: 08/31/2014 09:24 AM ZE5B   To: materials-welding@googlegroups.com   Subject: Re: [MW:21767] Soaking time as qualified. Mr Dilintas Can you pls explain us why? Intekhab Alam Ansari Lead Engineer QA/QC RIL J3 Expansion Project MTF/RTF Area On 30 Aug 2014 18:43, < george.dilintas@gr.bureauveritas.com > wrote: No Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Original Man [ aumpiem@gmail.com ]   Sent: 08/29/2014 04:36 AM MST   To: materia...

Usually hard facing  followed with hair cracks after cooling but you can repair with some high tensile electrodes depending on the hardness  check also for Preheating and PWHT is carried out properly Is recommended with high hardness and tough metals Regards, H.A On Sunday, August 31, 2014 7:57 AM, Mahantesh Loni <mahantloni@gmail.com> wrote: This is quite normal in hard facing welding On 30-Aug-2014 10:07 am, "jsn" < jsn@cal2.vsnl.net.in > wrote: Dear ,   Can please explain why hair line cracks are appearing after welding with ahand facing electrode   I have used a build up electrode  layer - 2 and 1 or two layers with hard facing electrode  a hair line crack at varius intervals.   I am informed that since it is hardfacing electrode hair line cracks will appear   = s p raman= J.Suryanarayanan   -- To post to this group, send email to materials-welding@googlegroups.c...

Mr Dilintas Can you pls explain us why? Intekhab Alam Ansari Lead Engineer QA/QC RIL J3 Expansion Project MTF/RTF Area On 30 Aug 2014 18:43, < george.dilintas@gr.bureauveritas.com > wrote: No Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Original Man [ aumpiem@gmail.com ]   Sent: 08/29/2014 04:36 AM MST   To: materials-welding@googlegroups.com   Subject: [MW:21753] Soaking time as qualified. Dear Sir Please you help me to clarify. Concerning we had prepared PQR is A333 Gr.6 (MDMT is -46 c) thickness 25 mm normally should be soaking time as 1 hr. But i want to it cover range 2t (50 mm thk.) so i had soaking time is 2 hrs. Question If we welding pipe thickness 25 mm. Can be PW HT as 1 hr or not ?       Or should be soaking time is in accordance with PQR as qualified ?   Ref. ASME IX Adisak -- To post to this group, send email to materials-welding@googlegroups.com To ...

Hi   They are stress relief checks and are common in hardfacing.   Regards   Prem Nautiyal cell: 9769316004 On Saturday, August 30, 2014 10:07 AM, jsn <jsn@cal2.vsnl.net.in> wrote: Dear ,   Can please explain why hair line cracks are appearing after welding with ahand facing electrode   I have used a build up electrode  layer - 2 and 1 or two layers with hard facing electrode  a hair line crack at varius intervals.   I am informed that since it is hardfacing electrode hair line cracks will appear   = s p raman= J.Suryanarayanan   -- 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...

This is quite normal in hard facing welding On 30-Aug-2014 10:07 am, "jsn" < jsn@cal2.vsnl.net.in > wrote: Dear ,   Can please explain why hair line cracks are appearing after welding with ahand facing electrode   I have used a build up electrode  layer - 2 and 1 or two layers with hard facing electrode  a hair line crack at varius intervals.   I am informed that since it is hardfacing electrode hair line cracks will appear   = s p raman= J.Suryanarayanan   -- 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...

1. Welder qualified for GTAW of cs is qualified to do ss welding (see QW-356, QW-433- no essential variable for performance qualification is changed), but the reverse will not be true, unless the cs welding is done with purging. This is not true for SMAW however, where the F-No for cs and ss consumables are different and hence this (change from cs to ss) will constitute a change in essential variable, needing re-qualification. 2. ASME B&PV Section IX does not explicitly call for tack welder qualifications, because that is generally specified in the design and construction code, which has referred to ASME Section IX for qualifications. For example, see para.328.5.1 (c), ASME B31.3, which states explicitly that "Tack welds at the root of the joint shall be made with filler metal equivalent to that used in the root pass. Tack welds shall be made by a qualified welder or welding operator. Tack welds shall be fused with the root pass weld, except that those which have cracked sha...

Could be done on plate Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Gopalakrishnan G [gopal2408@gmail.com]   Sent: 08/30/2014 01:11 AM MST   To: materials-welding@googlegroups.com   Subject: [MW:21759] Pipe to shell Welding Dear Experts I have to weld Pipe ( size DN 50 ) to Shell ( Thickness 25). Whether Welding Procedure qualification to be done on Pipe or plate? Please Specify how to qualify? Material - Pipe (ANSI B36.10) , Size - DN 50 (60.3 mm) and 5.54 mm thick                 shell ( SA 515 Gr 70) , Thickness - 25 mm Code Reference : ASME Sec 8 -- 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/ ...

You mean residual stresses cracks Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Kannayeram Gnanapandithan [kgpandithan@gmail.com]   Sent: 08/30/2014 10:19 AM ZE5B   To: materials-welding@googlegroups.com   Subject: Re: [MW:21758] RE: Cracks hair line apprearing after welding hard facing electrode it is stress relief cracks THANKS & BEST REGARDS KG.PANDITHAN, AWS-CWI, CSWIP 3.1 CONSULTANT-WELDING & QUALITY On Sat, Aug 30, 2014 at 10:02 AM, jsn < jsn@cal2.vsnl.net.in > wrote: Dear ,   Can please explain why hair line cracks are appearing after welding with ahand facing electrode   I have used a build up electrode  layer - 2 and 1 or two layers with hard facing electrode  a hair line crack at varius intervals.   I am informed that since it is hardfacing electrode hair line cracks will appear   = s p raman= J.Suryanarayanan   -- To post to this gro...

No Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: Original Man [aumpiem@gmail.com]   Sent: 08/29/2014 04:36 AM MST   To: materials-welding@googlegroups.com   Subject: [MW:21753] Soaking time as qualified. Dear Sir Please you help me to clarify. Concerning we had prepared PQR is A333 Gr.6 (MDMT is -46 c) thickness 25 mm normally should be soaking time as 1 hr. But i want to it cover range 2t (50 mm thk.) so i had soaking time is 2 hrs. Question If we welding pipe thickness 25 mm. Can be PW HT as 1 hr or not ?       Or should be soaking time is in accordance with PQR as qualified ?   Ref. ASME IX Adisak -- 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.blog...

Interpretations are not Code. This is well known Best regards Dr Georgios Dilintas Authorized Nuclear Inspector Authorized Inspector Supervisor HBS Regional Technical Manager   From: "rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA" [rajesh.mhaske17@gmail.com]   Sent: 08/29/2014 09:04 PM MST   To: materials-welding@googlegroups.com   Subject: Re: [MW:21746] Welder Qualification Dear sir  Plz refer Following QW-301.2 Qualification Tests.  Each manufacturer or contractor shall qualify each welder or welding operator for each welding process to be used in production welding and also refer following Interpretation Interpretation: IX-77-04 Subject:              Section IX, Tack Welder Qualification Date Issued:       January 31, 1977 File:                   NA      Quest...