Heat (Cast Lot) : Material originating from a final melt. For remelted alloys, a heat shall be defined as the raw material originating from a single remelted ingot. (Spec 6A, Spec 16A).
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}