P-Number, Group No, F-Number and A-Number in welding (ASME Section IX)
ASME Boiler and pressure vessel code (BPVC) has assigned certain numbers to base metals to minimize the number of procedure and qualifications. Base metals are categorized as P No. is further divided in group numbers based essentially on comparable base metal characteristics, such as: Composition, Weldability Brazeablity Mechanical properties. Filler metals (electrodes) are categorized as …
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