Babbit B83
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Б83 |
| Designation GOST Latin |
B83 |
| Transliteration |
B83 |
| The chemical elements |
Be83 |
Description
Babbit B83 is used: for the manufacture of ingots used to fill the bearings and other parts; bearings operating at high speeds and medium loads; turbine bearings, crosshead, and crank bearings ramovic low rpm diesel engines; bearings propeller shafts; the engine (to fill the bearings and bearings of steam turbines, turbo compressors, turbo pumps, compressors over 500 HP diesel engines, steam engines, ships of long voyage, ship and stationary steam engines with a capacity of over 500 kW.); bearing equipment of heavy engineering, operating at temperatures up to 70 °C, high speeds and high dynamic loads (during a quiet load — R up to 20000 kPa at a peripheral speed of 50 m/s; drum — up to 10000 kPa·m/s) eccentrics cone crusher primary crushing, bearing high-speed gear train. Does not apply to bearings, pour a thin layer and exposed to vibration loads.
Note
The coefficient of friction of the babbit without lubrication of 0.28, with a lubricant is 0.005. The maximum allowable speed is 60 km/h. Maximum load capacity: static — 400 kgf/cm2, dynamic — 1000 kg/cm2 sec, shock — 100 kgf/cm2 sec. The maximum temperature of normal bearing operation — +110 °C. recommended fill thickness ≥1.00 mm.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 1320-74, STP М320-74 |
| Castings from non-ferrous metals and alloys |
В84 |
OST 24.916.01-71 |
| Test methods. Packaging. Marking |
В59 |
STP М320-2003 |
| Solid alloys, metal-ceramic products and powders, metal |
В56 |
TU 14-22-91-95 |
Chemical composition
| Standard |
Fe |
Cu |
As |
Al |
Zn |
Sn |
Sb |
Pb |
Bi |
| STP М320-74 |
≤0.1 |
5.5-6.5 |
≤0.05 |
≤0.005 |
≤0.01 |
The rest |
10-12 |
≤0.35 |
≤0.05 |
| OST 24.916.01-71 |
≤0.08 |
5.5-6.5 |
≤0.1 |
- |
≤0.03 |
The rest |
10-12 |
≤0.35 |
≤0.05 |
| GOST 1320-74 (ИСО 4383-91 |
≤0.1 |
5.5-6.5 |
≤0.05 |
≤0.005 |
≤0.004 |
The rest |
10-12 |
≤0.35 |
≤0.05 |
Sn is the basis.
In accordance with GOST 1320-74 (ISO 4383-91), OST 24.916.01-71, STP M320-74, STP M320-2003, the mass fraction of lead impurity up to 0.50% can be increased in consumer demand in BBB3 brand B83.
The total content of impurities according to OST 24.916.01-71 should be ≤ 0.55%.
Mechanical characteristics
| σB, MPa |
d |
Brinell hardness number, MPa |
| In the delivery condition |
| ≥88 |
≥6 |
≥30 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
7380 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |
| С |
Specific heat |
