Heat Treatment of Steel: Elements of Tempering, Normalizing, and Annealing was produced by the Department of Education. The film explores the fascinating process of how steel is tempered, normalized and annealed. It goes into great detail about how this process changes the structure, toughness and hardness of plain steel as it goes through each of its transformative stages.

This DVD has a runtime of approximately 14 minutes.

Here are some sample images from the DVD