Heat Treatment and Testing of Carbon, Micro - Alloyed, and Low Alloy Steel Wrought and Cast Components Provides recommended prac tices for batch - type he at treatment, continuous - type heat treatment, and processing of qualific ation testing coupons (QTCs) for carbon, micro - alloyed, and low - allo y steel wrought and cast components. It is intended to provide a means for th e QTC to represent the properties in a part