Engineering Series Heat Treatment of Steel

3 films in this series.

Title ▲	Year	Creator	Length	Format	Sound
Elements Of Hardening	1945	U S Office Of Education		16mm	sound
Elements Of Surface Hardening	1945	Audio Productions Inc		16mm	sound
Elements Of Tempering, Normalizing And Annealing	1945	Audio Productions Inc	22 min	16mm	sound