Materials & Welding

Mr.Sanjay, Welded MONEL alloy 400 components normally go into service as welded. If there is a concern that the environment could induce stress corrosion cracking (e.g, steam containing ammonia), the structure could be stress relieved by heat treatment at 620 0 C to 760 0 C. It could be done by using LPG pumping, Electrical Resistance heating, Furnace  etc. Sridhar . ------------------------------------------------------------------------------------------------------------------------------------------------------------------ From: Rajagopal Kannan <rajagopal.kannan@gmail.com> To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com> Sent: Monday, 31 December 2012 3:49 PM Subject: Re: [MW:16392] Stress Relieving heat treatment of Monel 400 Dear Sanjay, As per UNF 56 of ASME sec. VIII Div.1, UNS N 04400 is not required to be Post Weld Heat treated. Thanks and Best Regards, K.Rajagopal On Tue, Jun 1, 2010 at 3:16 PM, Sanja...

Additional Sulphur to an extent of O.001 present  should not create problem for your operational temperature as the additional Mn available in the base metal. will neutralize the Sulphur in the form of Manganese Sulphide. If Oxygen & Sulphur if added in a fracture of volume more , it may create low impact properties at higher temp. For example, for CVN impact at -100 deg.C, (E 8018-C2) Sulphur is controlled within 0.02 max. for CVN impact at -60 deg.C, (E 8018-C1)  & at -50 deg. C ( E 8018-C3), Sulphur is controlled within 0.025 max. Since your operation is at -7 deg. C, in my opinion, it should not create any problems. Apart from impact, higher volumes of Sulphur  form low melting eutectics with Nickel to create hot  cracking and also reduces tensile properties if not controlled. All other elements present  other than C, Mn, Si are trace elements. It is Sridhar. From: M2M <hyperm2m@gmail.com> To: materials-welding@googlegroups.com Se...

  Dear Sir , I am looking for following material for Russian Make Pump. In the drawings provided to us below material is mention. 1.  Steel 40 X (IS 1570 -40) 2. Steel 25 3. Chromium steel 32 RC Can any one give me material properties or equivalent material? Thanks,   AniL India: +91 9769397758 Oman: +968 92782862

Many thanks, The issue is to verify the overlap itself between some bottom plates, since the owner has some doubts and wants to know if the 5 times the bottom plates thickness is there. BR Sent from my iPad On Dec 31, 2012, at 8:02 AM, "amit sunaria" < amit_sunaria@rediffmail.com > wrote: Dear friend, You can use Vacuum Box Test Method for Overlap weld joints. Thanks & Regards, Amit, Inspection Engineer, ABSIV,Bhogat Terminal, Jamnagar,Gujarat. From: Lassaad < lassaad.mokrani@gmail.com > Sent: Mon, 31 Dec 2012 09:38:54 To: " materials-welding@googlegroups.com " < materials-welding@googlegroups.com > Subject: [MW:16377] TANK BOTTOM PLATES OVERLAP Dear Experts, Is there any NDT method to check the overlap of bottom plates of an API650 built and used Oil steel tank.? Many thanks BR Sent from my iPad -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to m...

Dear Experts,     Wish you and your family happy new year 2012.   We have source  LTCS seamless pipe and flange of 108mm thickness as per the requireemnts given below.  Is it possible to get seamless pipe A 333 Gr. 6 of 108mm thickness.  If so pelase give details and also pelase share your expereince  in welding of such high thickness jobs as per the requireemnts of Chapter Ix  B 31.3.       WPS, Welder and NDT Qualification for High Pressure Piping (ASME B31.3, Chapter IX) Design Code: ASME B31.3, Chapter IX (2010) Scope of work:      1. Procuring the material as per the attached material datasheet. 2. Carryout Chemical and HIC tests (as per SP 2041 acceptance criteria: Region 3 service) on the procured material                                 3. Submit proposed WPS (PWPS) for project team approval 4. Cutting and welding the test coupon as per approved PWPS. 5. Carrying out PWHT, NDT, Mechanical tests as per approved PWPS and ASME B31.3, Cha...

Dear Sanjay, As per UNF 56 of ASME sec. VIII Div.1, UNS N 04400 is not required to be Post Weld Heat treated. Thanks and Best Regards, K.Rajagopal On Tue, Jun 1, 2010 at 3:16 PM, Sanjay Gandhi < sanjayseju88@gmail.com > wrote: Hi,   Has any body come across requirement of PWHT or stress relieving for Monel 400? I have read some where that Monel 400 material that is to be used in HF acid service , welds must be given stress reliving treatment to minimize the risk of stress corrosion cracking.    I am looking for following information. 1.) Whether post weld heat treatment is necessary for welds of Monel 400 operating in HF service. Any precedence of heat treatment or no heat treatment? 2.) If heat treatment is inevitable, how to carry out heat treatment of complete vessel? Conventional way by heating or any new technique, any specific furnace, any inert gas to be used, etc… 3.) Any cleaning treatment required after heat treatment? What is the effe...

Mr. Abhisekh, " After opening packet at the start of the days work , is it necessary to transfer a pack of  electrodes to a portable quiver for holding  at temp 100 deg C to prevent further moisture pick up ? or it is not required as manufacturer says that after opening up to 9 hrs it can be used at 80% / 27 deg C . Electrodes rebaking cycle depends upon which factors? Some client specifies recycling 1 time  , some 2 times ... [ As per BIS 13851:1993 , ( R 2006) - Storage & redrying of coverd electrodes  before use recommendations- 3 times ] " Answer: The very purpose of using  E 7018-1 H4 type Vacuum packed Electrodes is to avoid re-backing, as the H2 level is  <4 ml / 100 grams of  weld and can be used straight after opening the pack.  When not used  after  breaking the seal and considerable gap of time, re-baking is to be done, as the electrodes would  have picked  up  moisture by then,  due...

Dear Lassaad first you should inspected it visually. Specially you pay attention to important area such as sumps, three-plate laps, arc strikes, temporary attachment removal areas. Then All of bottom plate overlaps shall be tested by VBT(vacuum box test). Also you can see 7.3.3 from API 650(2007). Best Regards, Farhang -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Lassaad Sent: Sunday, December 30, 2012 7:19 PM To: materials-welding@googlegroups.com Subject: [MW:16377] TANK BOTTOM PLATES OVERLAP Dear Experts, Is there any NDT method to check the overlap of bottom plates of an API650 built and used Oil steel tank.? Many thanks BR Sent from my iPad -- 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 bo...

dear friend, as per my opinion, it must be placed in site quiver at 120C because vaccum pack replaces the requirement of rebaking not holding.  wat manufacturer is written 9 hrs.is regarding max. working time before rebaking requries. On Sun, Dec 30, 2012 at 8:47 AM, ABHISHEK GHOSH < ghoshabhishekmech@gmail.com > wrote: Dear Experts,  We are using E 7018-1 H4 Vacuum packed Electrodes for our project. ( Refer attachments ) , where manufacturer recommendations is mentioned as :  HD [ ml/100g] : at opening time : <5  Working time after opening : 9h at 80% RH / 27 deg C  After this period rebaking : 2h/340-360 deg C  Brand : Supercito VP Medium ,Oerlikon , Air Liquide Wedling France.  Weather Condition at site : 78- 80 % Humidity , Temp 26-30 Deg C.  My question is :  After opening packet at the start of the days work , is it necessary to transfer a pack of  electrodes to a portable quiver for holding at temp 100 deg C to prevent further moisture pick up ? or it is n...

Dear Pratap. To my knowledge & experiance:-   1) Effectiveness will be seen in Test results....  It is an Austenitic structure , so Argon purging is required (to de-oxidations) Answer of query no.1.& 2. 2) You can go for SMAW..(Good practice follows by Temper bead technique with TIG roots , Check Dp after every TIG root.)   3) Yes , Few portion of weld may effect microstructure , u must grind/gauge them properly to reduce/minimse chnces of falures..   4) It is best filler wire for sort of application.. It is also used for joing of Co rich &  Nickel Rich Plates (Dis-simaler joints)   5) Interpass temp is strictly maintained to MAX 150 Deg C.   @Dear Experts:- Pls , coorect me , if i am wrong....Also  pls elaborate that This fiiler wire ERNiCrCoMo-1 is or can be used for joining Nickel rich (Min50%) & cobalt rich (Min 50%) metals /plates.pipes   With regards,   Ashish P       On Sun, Dec 30, 2012 at 4:53 PM, Manindra Singh...

Dear friend, You can use Vacuum Box Test Method for Overlap weld joints. Thanks & Regards, Amit, Inspection Engineer, ABSIV,Bhogat Terminal, Jamnagar,Gujarat. From: Lassaad <lassaad.mokrani@gmail.com> Sent: Mon, 31 Dec 2012 09:38:54 To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com> Subject: [MW:16377] TANK BOTTOM PLATES OVERLAP Dear Experts, Is there any NDT method to check the overlap of bottom plates of an API650 built and used Oil steel tank.? Many thanks BR Sent from my iPad -- 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 ...

Dear All   I test a specimen of P355NL2(EN BS 10028-3-2003).but there is a problem in chemical composition. As per BS EN 10028-3(2003) max sulfur(S) limited to 0.01. we can ignore ± 0.003 as permissible deviation.   Below table is my material 's chemical analyze. As you can see sulfur is 0.014. with consideration of ± 0.003 as permissible deviation , just it is 0.001 exceeded.     I need to know what is effect of this little deviation( in sulfur) in mechanical properties of this material??? Does it have a big effect ??? I want to use my material in LPG tank(operation temp. is -7c).is it important or I can ignore this 0.001 sulfur????   Best Regards, M2M  

Dear Lassaad   Vaccum box testing is commonly practiced in Botttom plate overlap joint inspection. Regards Mohd. Ilyas On Sun, Dec 30, 2012 at 11:49 PM, Lassaad < lassaad.mokrani@gmail.com > wrote: Dear Experts, Is there any NDT method to check the overlap of bottom plates of an API650 built and used Oil steel tank.? Many thanks BR Sent from my iPad -- 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. -- Thanking You With Best Regards Mohammed Ilyas Mohiu...

Dear Experts, Is there any NDT method to check the overlap of bottom plates of an API650 built and used Oil steel tank.? Many thanks BR Sent from my iPad -- 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.

dear frnd   If dissimilar thickness method 1 correct, if same thickness method 2 is correct   Regards Vidhyapathi On Sat, Dec 29, 2012 at 3:59 PM, welding < samirmehta.jnd@gmail.com > wrote: Dear all, kindly go through the attached file and advice which one is correct and acceptable method as per the welding standard also provide reference documents.  regards samir -- 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.     -- To post to this group, ...

Dear all, we have to weld Alloy 800 HT material for steam methane reformer outlet header using TIG methodology and filler wire ER NiCrCoMo-1 . However, due to access constraint, we are having doubt on effectiveness of argon purging during welding. It may be noted that after root run of few portion, inner surface of weld was inspected and found to have shiny surface but base metal adjacent to weld bead is having grey color marks. now the question is: 1. How to check effectiveness of argon gas purging while welding with respect to root weld profile? 2. What kind of problem may come in future, if purging was not proper for weld? 3. Can we apply SMAW welding procedure for complete weld profile ( root, hot, filler and final passes)? 4. Few portion of old weld has been left on inner surface of pipe, whether it will affect the new weld or quality of weld? 5. Is there any other filler wire suitable to weld such kind of material? 6. Effect of interpass temperature ( i.e. 200-250 deg C),if not s...

Contcat your design department. Attached is the ASME B31.8 -2010 excerpt :  " Fig. I5 Acceptable Design for Unequal Wall Thickness" Relevant NOTE: to the figure attached. (1) No minimum when materials joined have equal specified minimum yield strengths. ವಂದನೆಗಳೊಂದಿಗೆ / Best regards, Nandesh Kumar A Abu Dhabi, UAE P.S. : Please don't print this e-mail unless you really need to. --- On Sun, 30/12/12, Samir Mehta <samirmehta.jnd@gmail.com> wrote: From: Samir Mehta <samirmehta.jnd@gmail.com> Subject: Re: [MW:16376] Final welding appearance To: materials-welding@googlegroups.com Date: Sunday, 30 December, 2012, 5:17 AM Pls find the attached pic. and advice as the spool is hold by quality control dept, they want me to fill the taper area, and i am not agreed cos its not bevel, pls provide some proof.  On Sat, Dec 29, 2012 at 7:05 PM, sreekanth < forusree99@rediffmail.com > wrote: sir, method -1 is correct as per asme sec ix Regar...

Hi   Such type of joint i.e Aluminium # CS is not possible by TIG welding in Heat exchanger.    In automobile industry, Aluminium # CS joints are being done by Friction welding and Friction Stir Welding. However in such type of joints there are formation of intermetallic phases like FeAl3 which can make the joint brittle and reduce ductility.   Hence such type of joint is not suitable in pressure vessels.   You have to look for alternate design change.   Regards   Prem Nautiyal --- On Mon, 12/24/12, Ashok Shende <shendeashok08@rediffmail.com> wrote: From: Ashok Shende <shendeashok08@rediffmail.com> Subject: [MW:16315] Filler wire for Aluminium to CS TIG welding To: materials-welding@googlegroups.com Date: Monday, December 24, 2012, 9:32 AM Dear experts we are having a project of aluminium heat exchangers with tube side MOC as aluminium SB 209. Here I want to make confirm the suitable filler wires f...