TEMPER COLOR. A thin, tightly adhering oxide skin that forms when steel is tempered at a low temperature, or for a short time, in air or a mildly oxidizing atmosphere. The color, which ranges from straw to blue depending on the thickness of the oxide skin, varies with both tempering time and temperature.
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SPRING TEMPER. A temper of nonferrous alloys and some ferrous alloys characterized by tensile strength and hardness about two-thirds of the way from […]
TRANSFORMATION HARDENING. Heat treatment comprising austenitization followed by cooling under conditions such that the austenite transforms more or less completely into martensite and […]
SHIM. A thin piece of material placed between two surfaces to obtain a proper fit, adjustment, or alignment. The piece can also be […]
STRESS EQUALIZING. A low-temperature heat treatment used to balance stresses in cold-worked material without an appreciable decrease in the mechanical strength produced by […]