Materials & Welding

Dear All, Greetings of the day.... I have a project and am working on EN standard material.It is my first time for EN material. The two types of material are given below: 1)EN 1.4401 2)EN 1.5415 Welding materials categories: 1)EN 1.4401 + EN 1.4401 2)EN 1.4401 + EN 1.5415 3)EN 1.5415 + EN 1.5415 May you please guide the WPS for this material,Bevel face,electrode characteristics and which specification/standard will be used? Thanks & Regards Saumey shrivastav   -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . To view this discussion visit https://gr...

 Appendix M is a non-mandatory appendix. Accordingly, its requirements cannot be enforced by the Client unless they are expressly stated in the contract or incorporated by reference in an applicable project document.   On Thu, Jun 4, 2026 at 9:40 AM 'manish kulkarni' via Materials & Welding < materials-welding@googlegroups.com > wrote: Yes , it should be done in PQR as well . Convince customer for the approach Sent from Yahoo Mail for iPhone On Thursday, June 4, 2026, 11:31 AM, Nambirajan Avudaiappan < nambirajanavudaiappan@gmail.com > wrote: This requirement is not applicable to PQR; it is applicable to WPQR. For WPQR, can we measure the ferrite content using a ferritoscope during production in the shop, instead of performing the point count method? Regards, Nambirajan A ...

Hi pradeep   It is client requirement. On Sun, 7 Jun 2026, 08:12 pradip kumar Sil, < pradipsil@gmail.com > wrote:  Appendix M is a non-mandatory appendix. Accordingly, its requirements cannot be enforced by the Client unless they are expressly stated in the contract or incorporated by reference in an applicable project document.   On Thu, Jun 4, 2026 at 9:40 AM 'manish kulkarni' via Materials & Welding < materials-welding@googlegroups.com > wrote: Yes , it should be done in PQR as well . Convince customer for the approach Sent from Yahoo Mail for iPhone On Thursday, June 4, 2026, 11:31 AM, Nambirajan Avudaiappan < nambirajanavudaiappan@gmail.com > wrote: This requirement is not applicable to PQR; it is applicable to WPQR. ...

Dear Experts, During my review of the WPS, I noted that a 4 mm GMAW wire has been specified. However, this wire size is not listed in the manufacturer’s technical datasheet available on their website. Although the vendor has submitted the wire MTC, there appears to be a discrepancy between the documented specifications and the datasheet. Additionally, I am surprised to observe that welding has reportedly been carried out at a current of 900 amps using this wire. I would appreciate your clarification on the feasibility and justification of this parameter, as it seems unusually high for GMAW applications. Kindly provide your technical inputs and supporting references for the above points. Best regards, Nambi -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails fr...

Dear Experts, Good morning! Has anyone performed ferrite–austenite phase evaluation for Duplex Stainless Steel (DSS)? As per my understanding, this requirement has been incorporated in ASME Section IX under Non-Mandatory Appendix M (M-600). I would appreciate if you could share your experience, procedures followed, or any practical challenges faced during implementation. Whether we can do with any machines without help of labratories Looking forward to your valuable inputs. -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAJuyB2W4yRfBs9N1zWWFd6EfNApA8u7-dqMYgr0HsXCkEDJVhA%40mail.gmail...

The steps are : 1. Establish the PQR with extreme care as welding parameters will play crucial role in phase formation. 2. Do the ASTM 562 ( ferrite count by metallography) and ferritoscope( this is a portable machine and to be used on production weld principle is magnetic here ). 3. Welding on production weld shall be done by welding parameters established during PQR establishment. 4. With ferritoscope production weld phase can be measured. On Thu, Jun 4, 2026, 9:13 AM Nambirajan Avudaiappan < nambirajanavudaiappan@gmail.com > wrote: Dear Experts, Good morning! Has anyone performed ferrite–austenite phase evaluation for Duplex Stainless Steel (DSS)? As per my understanding, this requirement has been incorporated in ASME Section IX under Non-Mandatory Appendix M (M-600). I would appreciate if you could share your experience, procedures followed, or any practical challenges faced during implementation. Whet...

As per API 650, local deviations from the theoretical shape (for example, weld discontinuities and flat spots) shall be limited as follows: a) Deviations (peaking) at vertical weld joints shall not exceed 13 mm (1/2 in.). Peaking at vertical weld joints shall be determined using a horizontal sweep board 900 mm (36 in.) long. The sweep board shall be made to the nominal radius of the tank. b) Deviations (banding) at horizontal weld joints shall not exceed 13 mm (1/2 in.). Banding at horizontal weld joints shall be determined using a straight-edge vertical sweep board 900 mm (36 in.) long. How is this value verified at site? For example, at a vertical joint, if one side shows 6 mm and the other side shows 7 mm, is it acceptable? Or should the average be considered? Also, how can we determine whether the deviation is negative (-) or positive (+)? Can anyone please explain? -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this mess...

What API 650 is asking you to check API 650 limits local shape distortion at welds: Vertical seam → peaking (a local “kink”/step at the vertical joint) Horizontal seam → banding (a local “belt”/flat/step around the circumference at a horizontal joint) In both cases the maximum allowed deviation is 13 mm. A) How to verify peaking at a vertical weld (sweep board – 900 mm) Tools: 900 mm long curved sweep board (curved to the nominal tank radius) + feeler gauge / wedge gauge (or a dial gauge). Field method: Put the sweep board horizontally across the vertical weld seam so it spans ~450 mm each side of the weld (board centered on the weld). Hold it snug to the shell (usually you rotate/shift it slightly to ensure it’s seated properly). Measure the maximum ga...

Yes, literature is available, but looking for actual production experience as normally martensitic SS.  , weld overlay is not performed.  Regards, Sent from Yahoo Mail for iPhone On Monday, May 11, 2026, 4:04 PM, sridhar cn <sridharcn305@gmail.com> wrote:   Though I have not done actual overlay, what I could gather from the available literature is that,  F6NM Stainless Steel weld overlay is   commonly   done in hydro turbine parts, valve internals,  and  pump sleeves   . The success of overlay depends much  more on dilution  control,   hydrogen control, and post-weld hardness management than on the actual deposition process itself.  F6NM / CA6NM  is  a  P6, air hardening l ow carbon martensitic stainless steel  with a pprox. 13%...

What problems are you expecting to face during pre and post overlay welding operations?  You have not yet spelled out whether it will be Stellite, Ni based or SS based overlay and on what thickness?  Could mention only the expected problems and precautions /solutions to avoid them in advance.  Unless the actual welding (PQR) is done, we will not know what practical problems to face.  Think you can guide us with your experience. All the Best!! rgds, On Mon, 11 May 2026 at 22:32, 'manish kulkarni' via Materials & Welding < materials-welding@googlegroups.com > wrote: Yes, literature is available, but looking for actual production experience as normally martensitic SS.  , weld overlay is not performed.  Regards, Sent from Yahoo Mail for iPhone On Monday, May 11, 2026, 4:04 PM, sridhar cn < sridharcn305@gmail.com > wrote: ...