This vintage book contains a detailed treatise on the subject of steel, exploring in particular how it is selected, hardened, and annealed. "Annealing" refers to a hardening process whereby steel is heated above the re-crystallization temperature and subsequently cooled in a furnace, water, or oil. Tempering is a process that removes "stress" by heating steel below the re-crystallization temperature and then is cooling it in the air. This volume contains...