The iron was made from O-1 (oil hardening, Starret brand in this case) steel. I milled some detents at the back so it is easy to hold. An initial 20 degree bevel was milled. This angle is very low (I normally use 30) but this iron is for light cuts on end grain. Heat treatment was by the book: Heat to phase change temp (steel is no longer magnetic, around 1,500F). I use a oxy-acetylene rose bud. Hold at that temp for a bit and quench in oil (I use a gallon can full of motor oil. And yes, it stinks). Bake in the oven to temper the blade (I use 325-350 degrees to get a Rockwell hardness in the low 60s). Then flatten the back and grind the bevel.