Filler metal selection
Filler metal selection
(OP)
Hello,
I am attempting to learn welding engineering by myself. When it comes to selecting filler metals, I am aware of the considerations such as base metal matching strength, welding process and welding position do matter. I recently came across a wps where ER-347 was used in the TIG welding of F91 and A105. ER-347 contains about 19-21% of Chromium whereas base metal, this case, F91 contains 8-9.5% Chromium. How this filler selection can be justified in this case? So my question is what would be the best way to start learning this aspect of welding? Knowing composition of base metal and electrodes would be a great start. Also, Is there an article in section IX that can give a tell us which electrode/filler to use for certain materials? I appreciate your advise.
I am attempting to learn welding engineering by myself. When it comes to selecting filler metals, I am aware of the considerations such as base metal matching strength, welding process and welding position do matter. I recently came across a wps where ER-347 was used in the TIG welding of F91 and A105. ER-347 contains about 19-21% of Chromium whereas base metal, this case, F91 contains 8-9.5% Chromium. How this filler selection can be justified in this case? So my question is what would be the best way to start learning this aspect of welding? Knowing composition of base metal and electrodes would be a great start. Also, Is there an article in section IX that can give a tell us which electrode/filler to use for certain materials? I appreciate your advise.





RE: Filler metal selection
Second, I would recommend you search for a Schaeffler DeLong diagram to understand what phases can be present based on anticipated filler metal and base metal combinations.
RE: Filler metal selection
RE: Filler metal selection
RE: Filler metal selection
RE: Filler metal selection
RE: Filler metal selection
RE: Filler metal selection
Austenitic, nickel-based filler metals which have higher chromium and nickel have been used with success on Grade 91 base material because they exhibit greater ductility over Grade 91 base material. Using a standard 9 Cr -1 Mo filler (undermatched strength) or matching 91 filler metal are your best choices for welding Grade 91 base materials.
RE: Filler metal selection
RE: Filler metal selection
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"