Originally Posted by crooked roads
What is aluminum type/alloy used in most casted bike parts???? Suzuki, honda.....
It depends on the part and the casting process that is used. If it is sand cast, or diecast, etc.
One thing for sure most cast aluminum parts have a tendency to have many pores throughout the microstructure. These pores tend to show themselves when you remelt the casting and the pores bubble out of the weld depending on the density of the casting.
In most cases cast aluminum will be more difficult to weld then an extruded or solid billet of aluminum. If the casting can be welded you can use a 4043 or 5356 series aluminum filler metal.
Here is a great book on Aluminum welding
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