Properties and Uses of Metal . . . . Basic Heat Treatment . . . . . Introduction to Welding . . . . Gas Cutting . . . . . Gas Welding . . . . . Soldering, Brazing, Braze Welding, and Wearfacing . . . Shielded Metal-Arc Welding and Wearfacing . . Gas Shielded-Arc Welding . . . .