Table 2-1.—Heat Colors for Steel

Table 2-1.—Heat Colors for Steel Table 2-2.—Approximate Soaking Periods for Hardening, Annealing, and Normalizing Steel metal and the properties desired. Some metals are Ferrous Metal furnace-cooled, and others are cooled by burying them To produce the maximum softness in steel, you heat in ashes, lime, or other insulating materials. the metal to its proper temperature, soak it, and then let Welding produces areas that have molten metal next it cool very slowly. The cooling is done by burying the to other areas that are at room temperature. As the weld hot part in an insulating material or by shutting off the cools, internal stresses occur along with hard spots and furnace and allowing the furnace and the part to cool brittleness. Welding can actually weaken the metal. together. The soaking period depends on both the mass of the part and the type of metal. The approximate Annealing is just one of the methods for correcting these soaking periods for annealing steel are given in tablc problems. 2-2. 2-3