学习以下内容就一清二楚了。
2013 Edition ASME Boiler & Pressure Vessel Code, Sect. IX
Qualification Standard for Welding, Brazing, and Fusing Procedures; Welders; Brazers; and Welding, Brazing, and Fusing Operators
QW-430 F‐NUMBERS
Table QW-432 F‐Numbers Grouping of Electrodes and Welding Rods for Qualification
QW-440 WELD METAL CHEMICAL COMPOSITION
Table QW-442 A‐Numbers Classification of Ferrous Weld Metal Analysis for Procedure Qualificationof Ferrous Weld Metal Analysis for Procedure Qualification
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