Materials & Welding

Dear Sirs, We have made 2 MockUp PQRs as per ASME Sec IX QW-193. The Tube sizes are 19.05OD x2.11T and 15.88OD x2.11T, the tubesheet plate is SA-516-70, 50T. Amps used Max 145, Volts Max 13, welded with GTAW AWS Class ER309 with 1.6mm Filler , 2 passes. We found minor cracks on the weld root and some on the surface too, but not for all the 10 tubes welded, but randomly found these cracks When we did PT after welding on the surface, no cracks were found. But found after Macro etching at the test lab. Can I switch the filler to ER309LMo for this MockUp weld ? Are these cracks called Hot cracks ? Please give me some advice. With best regards, Saravanan Sornam, Ansan city, S.Korea. -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the...

l like to get opinions on the interpretation of ASME Section IX, QW-217 Method  B Joint type: butt weld on a C omposite tube  The cladding thickness is NOT included in the design calculations Proposed welding sequence: A + B: weld thebase metal portion using GTAW + ER70S-3 C: restore the corrosion-resistant cladding using SMAW + E309L So, in practical terms: A+B = the base metal portion of the weldment C = the corrosion-resistant overlay portion of the weld   My question Under QW-217(b)(1) , the Code says: "The essential and nonessential variables of QW-250 shall apply for each welding process used in production for joining the base metal portion of the weldment . The PQRs that support this portion of the WPS need not be based on test coupons made with clad metal. For the corrosion-resistant overlay portion of the weld, the essential variables of QW-251.4 shall apply and the test coupon and testing shall be in accordance with Table...

Hi welding experts , I want to do a welding procedure in accordance to ISO15614, the client material rance from 16mm to 40mm, making reference to take table 7 of ISO15614, would using a 20mm plate support the qualification of the material thickness in question? most especially the 40mm  -- RILLEY CHELLAH MULENGA Materials Evaluation Head of Department E: rilley.mulenga@ahkgroup.com www.ahkgroup.com   ...

Hi  bavithran samuthralingam, Using a 20mm plate will be too tight for the procedure right ? since it will be borderline  nowonder you suggest 25mm ? very interesting  On Wed, 15 Apr 2026 at 14:26, bavithran samuthralingam < bavithranviit@gmail.com > wrote: Hi  You can select a test piece of 25 mm so that u can get a thickness range from 12.5 mm to 50 mm range  On Wed, 15 Apr 2026 at 2:25 PM Rilley Chellah Mulenga < rilley.mulenga@ahkgroup.com > wrote: Hi welding experts , I want to do a welding procedure in accordance to ISO15614, the client material rance from 16mm to 40mm, making reference to take table 7 of ISO15614, would using a 20mm plate support the qualification of the material thickness in question? most especially the 40mm  -- ...

Dear Expert, Can you give some information about P number of X12CrMoWVNbN-10-1-1 with reference? Thanks in advance. Ranendra Chakraborty  -- 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/CANGGva%2BObPxBiA1Ye7jhzPE_KDkA6%3DF1zoB4B_OWA1WxgdHJ8Q%40mail.gmail.com .

sure, 309LMO will be helpful as low carbon and MO are increasing delta ferrite for avoiding hot cracks also reduce heat input for controlling dilution from CS sheet Best Regards , Ahmed Osman On Thursday, April 16, 2026 at 08:32:05 a.m. GMT+3, PARAI Reaction Channel <saravanshyla@gmail.com> wrote: Dear Sir,  Thank you for your advice for root welding parameters.  Can i use ER309LMO  instead of ER309 ? Please confirm.  Thanks and regards,  Saravanan Sornam,  ANSAN, S.KOREA  On Thu, 16 Apr 2026, 12:06 pm Van...

Dear friends, below said material  is belongs to forging material.   X12CrMoWVNbN-10-1-1   (EN No. 1.4906), this is not P91/F91 type steel.  This is F92/P92 type forging or pipe material is under P no of 15E as per ASME sec VIII Div 1     Regards, Sankaran.SP Welding & Metallurgy expert Coimbatore, India.  On Friday, April 17, 2026 at 08:49:21 AM GMT+5:30, sridhar cn <sridharcn305@gmail.com> wrote: X12CrMoWVNbN-10-1-1   (EN No. 1.4906) is a high-alloy martensitic creep-resistant steel used in turbines and  high-temperature service. It is not listed in ASME Sec IX QW/QB-422; hence it is treated as an unassigned material.  Based on composi...

Dear Sir,  Thank you for your advice for root welding parameters.  Can i use ER309LMO  instead of ER309 ? Please confirm.  Thanks and regards,  Saravanan Sornam,  ANSAN, S.KOREA  On Thu, 16 Apr 2026, 12:06 pm Vanchinath S.A., < vanchinaths@gmail.com > wrote: Weld root with 80-90 amps.  Vanchi On Wed, 15 Apr, 2026, 7:18 pm PARAI Reaction Channel, < saravanshyla@gmail.com > wrote: Dear Sirs, We have made 2 MockUp PQRs as per ASME Sec IX QW-193. The Tube sizes are 19.05OD x2.11T and 15.88OD x2.11T, the tubesheet plate is SA-516-70, 50T. Amps used Max 145, Volts Max 13, welded ...

Check ER 347 Regards, Chandrakant B.E Mech. ASNT Level II RT/UT/PT/MPT/CSWIP GST -27AMOPP5962A1ZS Patni Engineers. Mumbai. India PED/2014/68/EU welding shop AD2000/DIN EN ISO 3834 IBR Approved  Factory Addreess- Pl Call  On Wed, 15 Apr 2026, 19:18 PARAI Reaction Channel, < saravanshyla@gmail.com > wrote: Dear Sirs, We have made 2 MockUp PQRs as per ASME Sec IX QW-193. The Tube sizes are 19.05OD x2.11T and 15.88OD x2.11T, the tubesh...

X12CrMoWVNbN-10-1-1   (EN No. 1.4906) is a high-alloy martensitic creep-resistant steel used in turbines and  high-temperature service. It is not listed in ASME Sec IX QW/QB-422; hence it is treated as an unassigned material.  Based on composition (10% Cr-Mo-W-V-Nb), it is metallurgically comparable to P91/P92 steels and aligns closest  with P-No. 5C. Under ISO15608 grouping this material falls under Group 10/Cr-Mo-V creep resistance steels. Sridhar. On Thu, 16 Apr 2026 at 14:51, Ranendra Chakraborty < ranendrac6@gmail.com > wrote: Dear Expert, Can you give some information about P number of X12CrMoWVNbN-10-1-1 with reference? Thanks in advance. Ranendra Chakraborty  -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to t...

Dear Experts, Is there any tolerances for bottom plate distortions, as I checked only foundation tolerances are specified in API 650. As we have 45mm distortion observed in one of the plates, how can we control it, as per code. -- 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/175e3d47-c294-4f11-a1f6-7ea014b68457n%40googlegroups.com .

If code of construction b31.3 then no issue. Generally for structure AWS D1.1 will follow. For this code you have to qualify welder. Both codes are different . On Sat, 18 Apr 2026, 8:13 am Mahmood Alhinai, < mahmood.m.alhinai@gmail.com > wrote: Dear experts, Pls could approved piping welder weld fillet structral weld? Thanks  -- 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/CANV5n6hdEWEc%2BMM7c8JUyBQSUeH2OQeKHwE8AYeZnAT5GLp9Tg%40mail.gmail.com . -- https://materials...

Dear experts, Pls could approved piping welder weld fillet structral weld? Thanks  -- 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/CANV5n6hdEWEc%2BMM7c8JUyBQSUeH2OQeKHwE8AYeZnAT5GLp9Tg%40mail.gmail.com .

The observed distortion (~45 mm) exceeds acceptable industry practice and may lead to uneven stress distribution and  loss of bearing. Typical industrial (not code mandated but widely accepted) practice is within 10 to 15 mm.  As API 650 requires proper seating of bottom plates you can  cut, refit, reweld to ensure  restoration of structural integrity  and compliance with code requirements.  Reduce the heat input by adopting sequence or skip welding methods and use strong back ups. Also check the foundation  level before laying the plates. Use Laser level inplace of a straight edge. Trust it is clear. Sridhar . ----------------------------------------------------------------------------------------------------------------------------------------------------------------- On Sat, 18 Apr 2026 at 12:38, Raminshah Muhammed < ramin.pcsb@gmail.com > wrote: Dear Experts, Is there any tolerances for b...

Dear Mr Sridhar, good & wishes for detailed explanation for welding of dissimilar material . All the inputs & parameters are found as good and meeting the standard requirements. small suggestion on PWHT temperature as given below: as per ASME sec VIII div-1 for 410 type steel- PWHT temperature will be 760deg C, kindly check & proceed further        Regards, Sankaran.SP Welding & Metallurgy expert Coimbatore, India.  On Tuesday, 17 March 2026 at 09:05:28 pm IST, sridhar cn <sridharcn305@gmail.com> wrote: Giving b elow are the hints for  WPS ( both ISO / AWS)  for joining SS 410 ( martensite ) to SS 316 (austenitic) .  This should be  supported by a PQR qualification .   WPS : Dissimilar Joint: SS 4...

 Dear Mr. Sankaran, 1.   For SS 410 (martensitic stainless steel) , PWHT directly affects hardness, toughness, and risk of cracking.   Metallurgical ly SS 410 forms untempered       martensite after welding , so   PWHT is mandatory  in most cases . PWHT is required to temper martensite , reduce hardness, and relieve residual stresses. 2.   Applicable Standards / References:  ASME Section II / IX   – Material & Welding Qualification . AWS D1.6   – Structural Welding Code (Stainless Steel) ;       Industry practice for martensitic (410/420 series)  SS materials. 3.  Evaluation of PWHT Temperature Options :     Option 1:  650–700°C (Selected r ange)-   Achieves effective tempering of martensite . Reduces hardness to acceptable range ( ~200–250 HV ) . Maintains       optimum balance of strength and toughness . Minim...