Gentleman, according to D1.1 if I weld two unlisted base metals togther, I'm restricted to
weld that specific base metal combination listed in the PQR. Does that mean for example:
PQR= 4130 to 8630M
Combination allowed:
4130 to 8630M
4130 to 4130
8630M to 8630M
Or, is the PQR just good for 4130 to 8630M, since the word "combination" used in Table 4.8
for Unlisted to Unlisted is singular in meaning. In other words, if it had stated
"combinations", then would the PQR be allowed the three different combinations listed above?