I have some cut out, but have not put any bevels on them yet. Give me a few days, or until after the holidays and I will have that info. What if found so far is, with .050 thickness steel, and the design that I have right now, yields me a 176 grain head before clean up and bevels put on them. I am sure that .050 thickness will be the best for what I want.
Now, not knowing types and kinds of metals, any metal that will allow me to us a file to sharpen them but still hold an edge is what I would want to use. And the older saw have more carbon in them so they would stay sharp longer. Not like the blades of today, where only the tips are tempered or have other metals attached to them right at the tips.