Bi-metal Bandsaw blade is NOT what you want for billet material- What you want is the mono steel blades. It is important to remove the black coating on the pallet strapping, as well as grind off the saw blade teeth - they attract crud and can start cold-shuts. I have the best luck with billets that are uniform, clean, tight and smooth sided. Pattern welding with mystery steel can be frustrating as heck! I'm Lucky enough to have a machinist friend that brings me all of his shops broken blades. And since he works in the tool maintenance department and is responsible for ordering new blades I have the luxury of knowing for sure what they are.
Jens