Aluminum Workshop: Where in the world is the 5052 filler alloy?
You can weld alloys like 5454 5154 5754 5083 and 5086 autogenously (without adding filler metal) without experiencing cracking. Of course in most cases a filler metal is added. The correct filler metal for the 5XXX alloys is one of the 5XXX fillers such as 5356 5554 5183 or 5556. However 5052 is the only 5XXX alloy that cannot be.