10.1.1 All the metal poured from a single heating in a batch
type melting furnace.
10.1.2 All the metal from two or more batch type melting
furnaces poured into a single ladle or a single casting.
10.1.3 All the metal poured from a continuous melting
furnace for a given period of time between changes in charge,
processing conditions, or aim-for chemistry or 4 h, whichever
is the shorter period.
10.1.3.1 The purchaser may agree to extend the 4-h time
period to 8 h if the manufacturer can demonstrate sufficient
process control to warrant such an extension.