Ami
Member
- Messages
- 93
- Location
- Israel
Just a gues. Copper and steel have a simular molecular weight so they can make some kind of a bond that way due to the fact that they cool at simular rates. Alu dosn't. It cools much more rapidly and contracts much more when cooling which would break the bond. The only way I see explosion welds work is that the much larger piece of steel prevents the alu from cooling so fast. Just an educated guess.