Question about filler materials
Question about filler materials
(OP)
Hi, I met a problem on WPS regarding filler materials. According to WPS we have, ERNICRMo-10 is specified (Section II, Part C SFA-5.14). The vendor is using ERNICRMo-3 instead because both of them have the same F number. So, they believe the two filler materials can be interchangable. Is that true? Thanks.





RE: Question about filler materials
RE: Question about filler materials
Just because the code may allow a contractor to do something is not justification to do something that is not reasonable from an engineering standpoint. There are many things to consider in addition to the essential variables listed by ASME Section IX. For instance; Joint detail is not a consideration, i.e., it is not an essential variable for the GTAW process. If the contractor qualifies the WPS using 1 3/4 inch thick material, the range of thickness qualified extends to 8 inches. While Section IX does not consider joint details as an essential variable, I believe most people recognize that switching from a V-groove with a 60 degree groove angle to a square groove with no root opening and using GTAW with a 3/32 inch diameter tungsten has little probability of success if the base metal thickness is 5 inches thick.
ASME has no provisions for common sense. The following essential variable does not appear in Section Nine: Does This Make Sense? The person making decisions must be competent and understand weld technology.
Best regards - Al
RE: Question about filler materials
RE: Question about filler materials
True, but then again, if you would have read the foreword you would know that ASME Boiler and Pressure vessel codes and standards are not handbooks for design and fabrication. Weld joint design such as a compound bevel are found in other publications.
RE: Question about filler materials
Best regards - Al
RE: Question about filler materials
Pandithan
RE: Question about filler materials
The ERNiCrMo-3 seems to be the go to filler when issues like this crop up.
RE: Question about filler materials
RE: Question about filler materials
If the Purchaser specified ERNiCrMo-10 for production welding, the Manufacturer may not substitute ERNiCrMo-3.