What P number is SA 182 F51 from ASME code?

I want to weld SA 182 F51 to SA 790 and SA 790 to Monel What P numbers are all of these?

The P-No classification was established by ASME Boiler and Pressure Vessel Code, SC IX to group metals having similar weldability characteristics.

The S-No was developed for metals that were not endorsed by ASME Boiler and Pressure Vessel Code, SC II. Again, the same premise applies regarding S-No classification as P-No classification.

The F-No is a classification for filler metals, similar to P and S-No classification.

The A-No define chemical composition for various filler metals and was established by AWS, years ago.

Try is web site:


You'll better be able to determine base/filler metal weldability groupings

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