Industrial saw blades I acquired for making knives. The steel in them has been incredible!! And the price was right. Less than $10 for the bandsaw blade chunks. $75 for the circular
How to Make a Knife From an Old Saw Blade : 9 Steps (with Pictures) - Instructables
Making a second knife from saw blade - YouTube
Origin Handcrafted Repurposes Saw Blades into Kitchen Knives