On Saturday, August 30, 2003, at 04:13 AM, Ralph Sproul wrote: > Ed, It is my belief the H13 doesn't start to temper back until > 800-900 degrees, so I dont' think your home oven is touching it. > > Ralph > The Carpenter data sheet for H13 lists 600F as the first temper temperature and lists a hardness of 51-53 R C at 600F Jim