Substitue Material for SA 234 for Boiler U-Bends
Substitue Material for SA 234 for Boiler U-Bends
(OP)
We are evaluating the use of SA 106 Gr C in place of SA 234 WPC for a boilers U-bend application. The SA 234 WPC and SA 106 Gr C have almost identical chemical composition and often used in u-bends for boilers also. In our case, as per the original design application, the boiler tubes are of SA 106 Gr C but the U-bends are of SA 234 WPC. Due to non-availability of SA 234 WPC in the market, we are evaluating the alternate SA 106 Gr C for u-bends.
During our internal discussions, it was mentioned that SA 106 Gr C have some grain growth issues when the pipe is bend during subsequent heat-treatment.
Would appreciate sharing of any concerns if you may have regarding the use of SA 106 Gr C in place of SA 234 WPC. Any input regarding the use of SA 106 Gr C in U-bends for boiler application would be greatly welcomed. Also, if someone can enlighten us as to why SA 234 WPC was specified for U-bends while boilers tubes are of SA-106 Gr C. Thanks
Best regards,
Metcorr
During our internal discussions, it was mentioned that SA 106 Gr C have some grain growth issues when the pipe is bend during subsequent heat-treatment.
Would appreciate sharing of any concerns if you may have regarding the use of SA 106 Gr C in place of SA 234 WPC. Any input regarding the use of SA 106 Gr C in U-bends for boiler application would be greatly welcomed. Also, if someone can enlighten us as to why SA 234 WPC was specified for U-bends while boilers tubes are of SA-106 Gr C. Thanks
Best regards,
Metcorr





RE: Substitue Material for SA 234 for Boiler U-Bends
RE: Substitue Material for SA 234 for Boiler U-Bends
The SA 106 Gr C, a possible alternative to SA234 WPC U-bend, is also to be welded to the tubes which are of SA 106 too. Do you see any concern using SA 106 Gr C instead of SA 234 WPC for U-bend application. Thanks.
RE: Substitue Material for SA 234 for Boiler U-Bends
RE: Substitue Material for SA 234 for Boiler U-Bends
The tubes are formed in hot state. Would appreciate if you could share what are the specific reasons that SA 234- WPC are preferred choice for u-bend compared to SA 106 grade C. They both have similar composition and in application where tube metal temperature is not above 400C, their hardness which is an important parameter from erosion prospective are also the same. Thanks.
RE: Substitue Material for SA 234 for Boiler U-Bends