I am going to be welding a tank using three different types of material. Each of the three types will be welded to itself and each of these three types will be welded to the other two types. In all there will be six different combinations of material when welding.The three material types are: A333 Gr 6 (P1 Group 1), A572 Gr 50 (S1 Group1), and A588 Gr A (S3 Group 1). What would be the minimum number of supporting PQR's required in order to write six WPS's to cover all combinations? This question will only pertain to FCAW process.
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