I'm wondering aboutm a few old circular saw blades laying about in the shop.  They have carbon teeth welded to the larger blade and I'm wondering if the steel in that type of blade would make a knife.  Would it have enough carbon to anneal and then heat treat?

Generally they use mild steel (i.e. low carbon) for blades tipped with carbide.  If you have an itchin' to make a knife from a saw blade, best to try one without carbide tipped teeth.  Here's a few made from such blades:

Love that design very functional.

Very nice knife!

I ahve quite a few blades on the shelf in the garage.  Some carbide tipped and some not.  I'll stick with the noncarbide for now and maybe try heat treating a piece of the other to see how it comes out.

Thanks for the help