1)Hot forging can in principle be done with dies that are "cold" or "hot" (i., heated to the same temperature as the billet). Both have benefits and...

1)Hot forging can in principle be done with dies that are "cold" or "hot" (i.e., heated to the same temperature as the billet). Both have benefits and drawbacks. Given that the dies are made of tool steel, which options are applicable to forging of aluminum? And which for forging of steel?

2) Which of the following attributes of the part affect die life span: metal type, complexity (i.e., requiring more or less deformation), small radii, and fine detailing, narrow tolerances? How do these attributes affect part cost price?