Babbitt alloys

Babbitt alloys Babbitt compositions Babbit-type alloys BAB dye... 

Arsenic added ia amounts of 0.1—3% improves the properties of lead-base babbitt alloys used for beatings (see Bearing materials). Arsenic (up to 0.75%), has been added to type metal to increase hardness and castabiUty (21). Addition of arsenic (0.1%) produces a desirable fine-grain effect in electrotype metal without appreciably affecting the hardness or ductihty. Arsenic (0.5—2%) improves the sphericity of lead ammunition. Automotive body solder of the composition 92% Pb, 5.0% Sb, and 2.5% Sn, contains 0.50% arsenic (see Solders and brazing alloys). 

When free access of salt water to a bearing is possible, the Babbitt alloys are not suitable since they are cathodic to steel shafts. For underwater bearings, alloys with 70% Sn, 1 5% Cu and the balance Zn, are used the possible dissolution of zinc gives cathodic protection to the shaft, although the more easily replaced bearing suffers some corrosion. 

Symposium on Lead-base Babbitt Alloys, Melal Progr., 69, 174 (1956)... 

Babbitt alloys -arsenic m [ARSENIC AND ARSENIC ALLOYS] (Vol 3)... 

Babbitt alloys are suitable for hundreds of types of installations involving the movement of machinery, eg, the main, crankshaft, connecting rod big end, camshaft, and journal bearings associated with marine propulsion, railroad and automotive transportation, compressors, motors, generators, blowers, fans, rolling-mill equipment, etc. 

Lead-base babbitt alloys Lead-base babbitt, SAE 13 10.24... 

Tin-rich babbitt alloys find very extensive use as bearing metals in marine engines and... 

Alloys of tin are very important. Soft solder, type metal, fusible metal, pewter, bronze, bell metal. Babbitt metal. White metal, die casting alloy, and phosphor bronze are some of the... 

AHoy scrap containing tin is handled by secondary smelters as part of their production of primary metals and alloys lead refineries accept solder, tin drosses, babbitt, and type metal. This type of scrap is remelted, impurities such as iron, copper, antimony, and zinc are removed, and the scrap is returned to the market as binary or ternary alloy. The dross obtained by cleaning up the scrap metal is returned to the primary refining process. 

Several ASTM methods are available for the determination of tin in tin-containing alloys such as solder, babbitt, and bronze (18). 

Babbitt Metals. High lead and tin alloys patented by Isaac Babbitt ki 1839 offer a superior combination of compatibiUty, conformabiUty, and... 

SAE 780 tin, silicon, and copper alloy, and SAE 770 using tin, copper, and nickel are aluminum alloys which have been widely used in medium- and heavy-duty diesels (6). With siUcon and cadmium incorporated for improved compatibiUty, both SAE 781 and 782 are used as an 0.5 mm to 3.0 mm overlay on a steel backing with a thin electroplated babbitt overlay. Traditional 6% tin—aluminum is also used as the SAE 780 alloy with an overlay. Eleven percent siUcon alloys are used for highly loaded diesel bearings in Europe. 

Many of uses of tin are also those of lead, because the metals form useful alloys. When lead is alloyed with a few percent of tin, it becomes harder and more durable. Although other compositions are produced, common solder consists of about an equal mixture of tin and lead. An alloy known as type metal contains about 82% Pb, 15% Sb, and 3% Sn, and pewter contains approximately 90% tin that is alloyed with copper and antimony. Babbitt, an alloy used in making bearings, contains 90% Sn, 7% Sb, and 3% Cu. Tin is also used to coat other metal objects to retard corrosion, and a tin-niobium alloy is used in superconducting magnets. 

Antimony (Sb), 3 41-56, 56. See also Group Ill-Sb system InAsSb alloy InSb photodiode detectors/arrays Lead-antimony alloys Low antimony lead alloys Stib- entries in babbitts, 24 797 catalyst poison, 5 257t chemical reactions, 3 42—44 in coal, 6 718 economic aspects, 3 47-48 effect of micro additions on silicon particles in Al-Si alloys, 2 311-312 effect on copper resistivity, 7 676t environmental concerns, 3 50 gallium compounds with, 12 360 health and safety factors, 3 51 in pewter, 24 798... 

BABAR-phos compounds, 13 645 Babbitt, Isaac, 24 796 Babbitts, 3 52-53 24 796-797 composition of, 3 52t Babbitt-type alloys, 24 426 Babcock and Wilcox boiler, 12 320 Baby foods, estimated maximum oxygen tolerance, 3 381t Baby preparations, 7 842t Bacillus, as a host system for gene expression, 12 477 Bacillus anthracis, 8 667 Bacillus coagulans, 12 79-80... 

Babbitt metal is another alloy of lead that is used in the manufacture of wheel bearings that reduces friction. Lead is an ingredient in several types of glass, such as lead crystal and flint glass. 

Lubricant-film bearings primarily employ the white-metal babbitts, and a variety of copper and aluminum alloys. Since steel and cast iron structural parts are frequently used as oil-film bearing materials, they are also briefly covered along with silver, zinc, and cadmium which find limited use. For small bearings and bushings in light-duty and intermittent service, materials with self-lubricating properties are commonly used. 

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