Skip to main content

Posts

[MW:36018] SS304/304L Tubes to CS Tubesheet Mock Weld -Cracks found

By 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...
Post a Comment
Read more
Recent posts

[MW:36015] ASME IX / QW-217 (b)

By Materials & Welding
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...
Post a Comment
Read more

[MW:36016] ISO15614

By Materials & Welding
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   ...
Post a Comment
Read more

Re: [MW:36018] ISO15614

By Materials & Welding
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  -- ...
Post a Comment
Read more

[MW:36024] P Number of X12CrMoWVNbN-10-1-1

By Materials & Welding
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 .
Post a Comment
Read more

Re: [MW:36024] SS304/304L Tubes to CS Tubesheet Mock Weld -Cracks found

By Materials & Welding
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...
Post a Comment
Read more

Re: [MW:36031] P Number of X12CrMoWVNbN-10-1-1

By Materials & Welding
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...
Post a Comment
Read more