Materials & Welding

Dear experts  I need clarification do we can provide earhing on weld mental, during welding of Pipeline Material API 5L PSL-2 X52 with the help of help of sharpened Rebar, Kindly explain with code & technical reference. Thanks & Regards Alex -- 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/7a8fceaa-8093-4ab9-be71-86ebbac8d6dan%40googlegroups.com .

dear mohd, 1. what was base metal thickness? is PWHT done to qualified for two PWHT cycle?,        # hardness achieved  after pwht100-140 hv is normal. 2. if Nickle 68% is concern, try with GTAW process. On Friday, October 17, 2025 at 8:26:35 AM UTC+3 Mohmmed Dudhiyawala wrote: Hi Everyone, We have encountered as PQR for Inconel-625 WOL on SA516 Grade 70 Normalized plate in 3G position. Two Anomalies were observed:  1. After PWHT of 120 mins, Hardness in base metal dropped from average 164 HV to average 108 HV! Has anyone observed such a drop in hardness? Is it possible?  2. 625 WOL is done using SMAW electrode from Special Metals, the Nickel content as per consumable TC is 65%. While in WOL chemistry, 1.5mm from Top, Nickel % came around 68%. 3% Higher!! Is this possible, in any case? Thanks in advance from your expert views. Regards, Mohammed Dudhiyawala, IWE -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this messag...

Hi Mulenga, I currently have such a calculation. I used it in my previous works. There are 3 alternatives for you. It can be used as an alloy and transition wire. Don't forget to check your own calculations and the FN region. The De Long diagram is good. ErNiCr3 SFA A5.14 >> Since the Cr Ni ratio will be high, the Ferrite ratio in Duplex should not fall below 30%. Duplex ER2209 SFA A.9 >>> Seems ideal. Since there will be a combination of 304 different materials, there will be some loss of chemical properties of the superduplex. In fact, you get a complete Duplex. Superduplex ER2594 SFA A5.9 >>> Definitely the best. The amount of Cr in the weld metal will increase. The amount of Ni also to a very small extent. In both options, you remain in the Austenite+Ferrite region. Don't forget to do a cost calculation according to the importance of the job. <<< Maybe I don't need to say it, but use 100% Ar as Shielding and Backing gas. If you have the ...

use same duplex electrode or filler wire. On Wednesday, October 22, 2025 at 5:52:13 PM UTC+3 Yasin Tamay wrote: Hi Mulenga, I currently have such a calculation. I used it in my previous works. There are 3 alternatives for you. It can be used as an alloy and transition wire. Don't forget to check your own calculations and the FN region. The De Long diagram is good. ErNiCr3 SFA A5.14 >> Since the Cr Ni ratio will be high, the Ferrite ratio in Duplex should not fall below 30%. Duplex ER2209 SFA A.9 >>> Seems ideal. Since there will be a combination of 304 different materials, there will be some loss of chemical properties of the superduplex. In fact, you get a complete Duplex. Superduplex ER2594 SFA A5.9 >>> Definitely the best. The amount of Cr in the weld metal will increase. The amount of Ni also to a very small extent. In both options, you remain in the Austenite+Ferrite region. Don't forget to do a cost calculation according to the importance of the jo...

hi  Saurabh, would pl share who was manufactures of B.M? now a days MTC's r not reliable.. On Friday, October 17, 2025 at 9:18:52 AM UTC+3 Saurabh Jain wrote: Dear Mohammed, Thank you for your response. We're facing another significant issue. Most of our carbon steel Procedure Qualification Records covering groups G1-G2, G1-G3 & G2-G3, G3-G3 with various process combinations are showing an unacceptable hardness range (260–325 HV) in the Heat-Affected Zone. Our maximum acceptable hardness limit is 250 HV. We've used different testing agencies, yet the results remain consistently high. Regards, Saurabh On Fri, 17 Oct 2025 at 8:26 AM, Mohmmed Dudhiyawala < mdudh...@gmail.com > wrote: Dear Saurabh, Refer Table A.12 of NACE MR0175/ISO 15156, where Inconel 625 is designated as Type 4d. Refer Table A.14. From Temp<149°C, Inconel 625 can be used for all conditions, stipulated in table. Hardness to be limited to 40 HRC max. (392 HV). Regards, Mohammed...

No. On Tuesday, October 21, 2025 at 7:11:02 PM UTC+3 Alex Kumar Antony wrote: Dear experts  I need clarification do we can provide earhing on weld mental, during welding of Pipeline Material API 5L PSL-2 X52 with the help of help of sharpened Rebar, Kindly explain with code & technical reference. Thanks & Regards Alex -- 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/8610bce9-c27d-4d76-8549-d800f275a64en%40googlegroups.com .

Dear Team,   I want to confirm about the PWHT requirement in carbon steel pressure vessel as per ASME section Viii Div.1 UCS-56. Soaking time has been calculated as per vessel wall thickness 29mm but trunion wall thickness is 50mm welded with shell. Can this 50mm thikness be exluded from PWHT soaking time requirement.  1.Is there any interpretation to confirm that PWHT parameters shall be calculated as per shell wall thickness only not for attachment welded with pressure parts? 2. Below para is applicable for PWHT requirement. Best regards, M Bilal -- 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/CAOq7hqt...

by sketch, its joint between 22mm and 50mm ? so consider thickness 22mm butt weld and beyond above is fillet joint. On Thursday, October 23, 2025 at 4:57:31 AM UTC+3 Ch Bilal jovinda wrote: Dear Team,   I want to confirm about the PWHT requirement in carbon steel pressure vessel as per ASME section Viii Div.1 UCS-56. Soaking time has been calculated as per vessel wall thickness 29mm but trunion wall thickness is 50mm welded with shell. Can this 50mm thikness be exluded from PWHT soaking time requirement.  1.Is there any interpretation to confirm that PWHT parameters shall be calculated as per shell wall thickness only not for attachment welded with pressure parts? 2. Below para is applicable for PWHT requirement. Best regards, M Bilal -- 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 a...

Any concern on this? -- 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/28288ab6-64c8-477a-b295-261aa8b45066n%40googlegroups.com .

Dear Bilal, No, you cannot simply ignore the 50 mm trunnion when deciding PWHT . ASME VIII-1 (UCS-56 and related notes/interpretations) makes the pressure-retaining part control the PWHT temperature , but the thickness at the weld/attachment and the weld volume (soak band) are explicitly used to determine heating rate and holding/soaking time. In practice you must check UCS-56 and the ASME interpretations and use the greater thickness condition required by the Code rules for the weld/joint when sizing soak time (and ensure the soak band contains the weld and HAZ)   Thanks, Balamurugan On Thu, Oct 23, 2025 at 8:38 PM Mohd Siraj < mohd52100@gmail.com > wrote: by sketch, its joint between 22mm and 50mm ? so consider thickness 22mm butt weld and beyond above is fillet joint. On Thursday, October 23, 2025 at 4:57:31 AM UTC+3 Ch Bilal jovinda wrote: Dear Team,   I want to confirm about the PWHT requirement in carbon steel pressure vessel as per ASME section Viii Div.1 UCS-56. Soaking...

Blind Flanges (manhole or other) are keep separate in farnace. Don't assemble with vessel.  Flanges serrations need to protect, apply chalk powder . Welded flanges will do PWHT along with vessel. Because of flanges thickness. On Thu, 23 Oct 2025, 6:08 pm Mohd Siraj, < mohd52100@gmail.com > wrote: which type of gasket u will use to fix permeant blind flange? On Thursday, September 4, 2025 at 4:06:54 PM UTC+3 Muhammed Ibrahim PK wrote: Dear All, Is it required to place permanent blind flanges in the furnace when the vessel requires PWHT ?.  If there is handle welded on blind flange, PWHT required ? Thanks & Regards Muhammed Ibrahim PK -- 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@googlegro...

Please proceed with PWHT considering 50mm butt weld size thickness of Trunion .. Regards Prem Nautiyal  Mumbai, India  On Thu, 23 Oct 2025 at 21:05, Bala Murugan < balamuruganqaqc@gmail.com > wrote: Dear Bilal, No, you cannot simply ignore the 50 mm trunnion when deciding PWHT . ASME VIII-1 (UCS-56 and related notes/interpretations) makes the pressure-retaining part control the PWHT temperature , but the thickness at the weld/attachment and the weld volume (soak band) are explicitly used to determine heating rate and holding/soaking time. In practice you must check UCS-56 and the ASME interpretations and use the greater thickness condition required by the Code rules for the weld/joint when sizing soak time (and ensure the soak band contains the weld and HAZ)   Thanks, Balamurugan On Thu, Oct 23, 2025 at 8:38 PM Mohd Siraj < mohd52100@gmail.com > wrote: by sketch, its joint between 22mm and 50mm ? so consider thickness 22mm butt weld and beyond above is fillet joint. On Th...

QW-403-16 is only applicable for welder qualification. Thanks & Regards J.Gerald Jayakumar 0091-8838619635 On Monday 20 October, 2025 at 09:54:07 am IST, venkateswara reddy Desireddy <dvreddy82@gmail.com> wrote: In QW 202.4  dissimilar base metal thickness. There is a two conditions ,one is 6mm or grater another 38mm or grater. Based on P number we have to choose WPS for branch welds.  For butt welds L seam, C seam in  thicker material will do tapering, in this condition thinner material thickness we will take for WPS selection. QW-403-16 for set in ,set on joints pipe OD details given. Sent from Outlook for Android From: materials-welding@googlegroups.com <materials-welding@googlegroups...

In QW 202.4  dissimilar base metal thickness. There is a two conditions ,one is 6mm or grater another 38mm or grater. Based on P number we have to choose WPS for branch welds.  For butt welds L seam, C seam in  thicker material will do tapering, in this condition thinner material thickness we will take for WPS selection. QW-403-16 for set in ,set on joints pipe OD details given. Sent from Outlook for Android From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of Anandhapadmanabha pillaim <anandhapadmanabhapillaim1997@gmail.com> Sent: Sunday, October 19, 2025 9:14:31 PM To: materials-welding@googlegroups.com <materials-welding@googlegroups.com> Subject: Re: [MW:35847] SET ON ASME SEC IX   While considering the thickness, if it's a dissimilar thickness, the thickness of the smaller one and upper one should fall as per QW-451.1 if the qualification is...

Good day experts , we encountered  a challenge trying to reducers of 108 duplex steel to mild steel and welding 108 duplex stainless steel steel to 304 stainless schedule 80, what is the best filler rods i can use when using TIG  -- Thanks & kind regards         www.ahkgroup.com                      Rilley Chellah Mulenga       HEAD - MATERIALS EVALUATION       T:   +260 212 226431       M: +26076123880 / 0964084833       E: Rilley .Mulenga@ahkgroup.com DISCLAIMER: The information in this Internet e-mail is confidential and may be legally privileged. It is intended solely for the addressee(s). Access to this Internet e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. All results and data contained in this document are subject to our Standard Terms and Conditions and are valid only when supported by an original docume...

What is the 108 duplex steel ? Pl inform Duplex garde? On Mon, 20 Oct 2025 at 9:12 PM, Rilley Chellah Mulenga < rilley.mulenga@ahkgroup.com > wrote: Good day experts , we encountered  a challenge trying to reducers of 108 duplex steel to mild steel and welding 108 duplex stainless steel steel to 304 stainless schedule 80, what is the best filler rods i can use when using TIG  -- Thanks & kind regards         www.ahkgroup.com                      Rilley Chellah Mulenga       HEAD - MATERIALS EVALUATION       T:   +260 212 226431       M: +26076123880 / 0964084833       E: Rilley .Mulenga@ahkgroup.com DISCLAIMER: The information in this Internet e-mail is confidential and may be legally privileged. It is intended solely for the addressee(s). Access to this Internet e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawfu...

The duplex steel grade is  SAF 2507 On Mon, 20 Oct 2025 at 17:51, Vishwas Keskar < vvkeskar123@gmail.com > wrote: What is the 108 duplex steel ? Pl inform Duplex garde? On Mon, 20 Oct 2025 at 9:12 PM, Rilley Chellah Mulenga < rilley.mulenga@ahkgroup.com > wrote: Good day experts , we encountered  a challenge trying to reducers of 108 duplex steel to mild steel and welding 108 duplex stainless steel steel to 304 stainless schedule 80, what is the best filler rods i can use when using TIG  -- Thanks & kind regards         www.ahkgroup.com                      Rilley Chellah Mulenga       HEAD - MATERIALS EVALUATION       T:   +260 212 226431       M: +26076123880 / 0964084833       E: Rilley .Mulenga@ahkgroup.com DISCLAIMER: The information in this Internet e-mail is confidential and may be legally privileged. It is intended solely for the addressee(s). Access to this Internet e-mail by anyone else is unauthorised. If you are not the intended recipient, any discl...