Have some ASTM A519 Grade 4130 pipe and we need to weld an x52 Weld-O-Let into it in a spec change area. I cannot seem to find out where Sec IX says we can use the Weaker tensile of the filler metal (70,000) of the X-52 Weld to make the weld onto the 4130 (100,000 + yeild material).

THe contractor has a procedure for it but cannot find the ruling..... Anyone have any help for me?

Thanks,
Lee