Babbit B-83, ingot
Babbitt is an antifrictional tin-based casting alloy with the addition of copper, lead, antimony and other alloying components.
The density of tin babbit is 7380 kg / m³. It has a low hardness value of 27-30 units on the Brinell scale. At the same time, in comparison with other antifriction alloys, babbit B83 has the highest plasticity.
The tin content in Babbit B83 makes it immune to weak acids and alkalis. Babbitt does not oxidize in air and is resistant to the effects of the aquatic environment.
The application of B83 is bearings operating at high speeds and medium loads. Turbine bearings, crosshead, crank and frame bearings of low-speed diesel engines, thrust bearings of propeller shafts.
It is produced in the form of ingots weighing 15-16 kg, packed in a package weighing up to 1 ton, tied with four steel bands.
By agreement with the consumer, it is allowed to manufacture babbitt in ingots of other shapes and sizes.
Chemical composition
| Brand | Main chemical element | Impurities, not more | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tin Sn, % | Antimony Sb, % | Copper Cu, % | Cadmium Cd, % | Iron Fe, % | Arsenic As, % | Zinc Zn, % | Plumbum Pb, % | Bismuth Bi, % | Aluminum Al, % | |
| B83 | Balance | 10,0 - 12,0 | 5,5 - 6,5 | - | 0,1 | 0,05 | 0,004 | 0,35 | 0,05 | 0,005 |
Properties and applications
| Brand | Temperature, 0C | Application area | ||
|---|---|---|---|---|
| Beginning of melting | Melting point | Pouring temperature | ||
| B83 | 240 | 370 | 440-460 | Bearings operating at high speeds and medium loads, turbine bearings, crosshead, crank and frame bearings of low-speed diesel engines, thrust bearings of propeller shafts. |
Physical and mechanical properties of tin and lead babbits
| Brand | Density | BHN HB 5/62, 5/60, HB 2, 5/15, 6/60 at 200C | Compression yield point, kgf/mm | Compressing strength, kgf/mm | Melting onset temperature, 0C | Melting Point, 0C | Pouring temperature, 0C |
|---|---|---|---|---|---|---|---|
| B83 | 7,38 | 27-30 | 8-8,5 | 11-12 | 240 | 370 | 440-460 |