Hardness for the annealing-process is listed normally on HRB scale, at the maximum value. this process is performed for refining grain size, improving strength, affecting electromagnetic properties and removing residual stress.  

Heat treating is a process of heating or cooling metals and is used to alter their properties in order to obtain the desired shape and structure such as brittleness, hardness, and softness. The steps for achieving these things are consistent with all heat treatment processes. Heat treatment techniques include annealing, tempering, hardening, quenching, stress releasing […]