Preparatory run to Crack in a die impression, generally due to forging pressure and/or excessive die temperature. Die blocks too hard for the depth of the die impression have a tendency to check or develop cracks in impression corners. or test equipment, A material applied to dies, molds, plungers, or workpieces that promotes the flow of metal, reduces friction and wear, and aids in the release of the finished part., The material to be forged regardless of form. Also, an individual piece of metal used to produce a single forging., tools, or methods prior to a production run. Production Preparatory run to check or test equipment, lubricant, stock, tools, or methods prior to a production run. Production tryout is run with tools previously approved; new die tryout is run with new tools not previously approved. is run with tools previously approved; new The machined recess in a die that gives the forging its shape. tryout is run with new tools not previously approved.