From: Effects of tool offset, pin offset, and alloys position on maximum temperature in dissimilar FSW of AA6061 and AA5086
Aluminum alloy
Mg
Mn
Cu
Cr
Si
FE
AL
AA6061-T6
0.918
0.083
0.328
0.065
0.663
0.491
Balance
AA5086-O
4.12
0.447
0.031
0.105
0.244
0.343