Welding Super 304H with P91
Welding Super 304H with P91
(OP)
We are going to weld Super 304H with P91 for boiler application during site erection. I propose to butter the P91 edge with E NiCrFe3 and complete PWHT at 760 deg C in shop. Site weld with Super 304H at site will be done with E NiCrFe3. I understand that buttering the P91 edge with E9018 B3 before E NiCrFe3 layer is recommended for better life. Does anybody have any experience to share?





RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
for tube we have directly welded with Super 304H and heat treated. we have not faced any problems sofar
Pandithan, AWS-CWI, CSWIP 3.1
Welding Consultant
RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
RE: Welding Super 304H with P91
The Super 304H as stanweld pointed out is a hybrid stabilized austenitic stainless steel, unlike traditional 304H. Second and last point, there will be welding required during fabrication of the assembly that will not have a solution treatment performed, meaning exposure to elevated temperature is unavoidable. Also, elevated temperature exposure will result in eventual sensitization of the bulk tube material over time.