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| >> GLOSSARY OF TERMS |
| BASE BOX See Tin Plate Base Box. |
| BASIC OPEN HEARTH (See Open Hearth Process.) |
| BASIC OXYGEN PROCESS A steel making process wherein oxygen of the highest purity is blown onto the surface of a bath of molten iron contained in a basic lined and ladle shaped vessel. The melting cycle duration is extremely short with quality comparable to Open Hearth Steel. |
| BASIC PROCESS A steel making process either Bessemer, open hearth or electric, in which the furnace is lined with a basic refractory. A slag, rich in lime, being formed and phosphorous removed. |
| BASIC STEEL (See Basic Process.) |
| BATH ANNEALING Is immersion in a liquid bath (such as molten lead or fused salts) held at an assigned temperature-when a lead bath is used, the process is known as lead annealing. |
| BAUXITE The only commercial ore of aluminum, corresponding essentially to the formula Al2O3xH2O. |
| BEADING Raising a ridge on sheet metal. |
| BEND TEST Various tests used to determine the toughness and ductility of flat rolled metal sheet, strip or plate, in which the material is bent around its axis or around an outside radius. A complete test might specify such a bend to be both with and against the direction of grain. For testing, samples should be edge filed to remove burrs and any edgewise cracks resulting from slitting or shearing. If a vice is to be used then line the jaws with some soft metal or brass, so as to permit a free flow of the metal in the sample being tested. |
| BERYLLIUM COPPER An alloy of copper and 2-3% beryllium with optionally fractional percentages of nickel or cobalt. Alloys of this series show remarkable age-hardening properties and an ultimate hardness of about 400 Brinell (Rockwell C43). Because of such hardness and good electrical conductivity, beryllium-copper is used in electrical switches, springs, etc. |
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