Babbitt alloys


Babbitt alloys Babbitt compositions Babbit-type alloys BAB dye  [c.84]

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.  [c.808]

Symposium on Lead-base Babbitt Alloys, Melal Progr., 69, 174 (1956)  [c.811]

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  [c.118]

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.  [c.58]

Several ASTM methods are available for the determination of tin in tin-containing alloys such as solder, babbitt, and bronze (18).  [c.60]

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.  [c.5]

Uses. Leaded tin bronzes are used as valves and as fittings for pressure parts (UNS C 92200) and for high pressure steam (UNS C 92300). The high leaded tin bronze alloys are used as bearings and bushings (UNS C 93200) as small bearings, bushings, and backing for babbitt-lined bearings (UNS  [c.249]

Material ehanges of the babbit are sometimes undertaken. Changing from the more eommon steel baeked babbitted bearings to the eopper alloys, with this babbitted pads, eonduets surfaee heat away at a faster rate, thus inereas-ing the load earrying eapaeity. In some instanees, a 50-100% load earrying eapaeity improvement ean be aehieved. Some equipment manufaeturers are offering bearing-upgrading kits for their maehine in serviee.  [c.740]

Although much lead is used as an inert material in east, rolled or extruded form, a far greater tonnage is eonsumed as alloys. Its major applieation is in storage batteries where an alloy of 91% Pb, 9% Sb forms the supporting grid for the oxidizing agent (PbOj) and the redueing agent (spongy Pb). Over 70% of this Pb is reeovered and reeyeled. In addition, its use (with Sn) in solders, fusible alloys, bearing metals (babbitt) and type metals has been summarized on p. 370. Other meehanieal as distinet from ehemieal applieations are in ammunition, lead shot, lead weights and ballast.  [c.371]

There are three main types of Babbitt alloy for bearings high-tin alloys (substantially lead-free), intermediate-tin alloys containing some lead, and high-lead alloys. The high- and intermediate-tin alloys have the resistance of tin to the weak acids and sulphur compounds which may be present in used oils the lead-rich alloys are rather less resistant . The anti-oxidant action of tin is useful in limiting acidity. Rare instances of corrosion of tin-rich bearings have occurred, with the formation of hard crusts of tin oxide in which the intermetallic compounds of tin with copper and with antimony may remain embedded. Although the causes are not wholly established, some access of water to the bearing is an essential factor and accumulation of breakdown products of constituents of the lubricating oil may contribute . The nobility of intermetallic compounds of tin relative to tin itself has been demonstrated .  [c.808]

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).  [c.329]

Tin—antinomy—copper and lead—antimony—tin white bearing alloys, commonly referred to as babbitt, are used to reduce friction and wear in machinery and help prevent failure by seizure or fatigue. These alloys exhibit good mbbing characteristics even under extreme operating conditions such as high loads, fatigue, or high temperatures. Tin babbits have greater corrosion resistance than lead babbitts. However, lead babbitts are generally cheaper than tin babbitts. Addition of antimony to babbitts increases strength and hardness. The choice of babbitt depends on the appHcation and resultant desired properties. The use of antimony in babbits has been declining because technological advances have reduced the thickness of babbitt on backing material, and there is competition from aluminum —tin alloys and nonmetallic substitutes.  [c.198]

Babbitt Metals. High lead and tin alloys patented by Isaac Babbitt ki 1839 offer a superior combination of compatibiUty, conformabiUty, and  [c.2]

Cadmium alloys had been used in some passenger car and tmck engines, and in some roU neck bearings for steel mills. Despite high temperature fatigue strength somewhat superior to babbitt and excellent compatibiUty with steel, poor corrosion resistance to oxidi2ed oil and high cost have gradually led to phasing out of cadmium bearings.  [c.5]


See pages that mention the term Babbitt alloys : [c.398]   
Corrosion, Volume 2 (2000) -- [ c.4 , c.165 ]