I bought a 7 1/4" 24-tooth Irwin Marathon "WeldTec" circular saw blade with the intention of using it in the table saw to rip hardwood pallet stringers with embedded (and non-removable) nails. The packaging for the "WeldTec" blades specifically advertises the use of the blade for wood with embedded nails, as the teeth are welded on rather than braised. My saw does not exceed the blade's rated RPMs.
I knew that this was a risky task even though the blade appeared to be designed especially for it, so I installed all of the safety devices that were supplied with the table saw (blade guard, kickback claw, etc.). I did two rips, each one standing off to the side rather than behind the stringer. Featherboards were used to keep it flush against the fence and the table. As soon as the leading edge cleared the back of the table, I moved to the back and pulled the rest of the piece through.
The first rip was clean. But by the end of the second, the saw was obviously struggling and wisps of smoke started to appear from the kerf. After shutting down the saw, I found that all 24 teeth were gone from the blade.
Obviously, I'm disappointed in the product. Maybe it was unreasonable for me to expect this style of blade to perform this task, but it was advertised as being up to the task. I've seen a DeWalt blade (DW3191) similarly advertised as being a "nail cutting" blade, but I've not been able to find one for sale locally. Has anyone had a good experience with a particular blade for achieving a straight rip on the table saw through wood with embedded nails?