Chemical Composition (%)
| Sb | 4.0~5.0 |
|---|---|
| Cu | 4.0~5.0 |
| Sn | Balance |
Mechanical & Physical Properties
| Hardness | ≈20 HBW |
|---|---|
| Density | ≈7.3 g/cm³ |
Typical Applications
Grade Overview
The lowest-antimony tin-based Babbitt, used for high-speed bearings, thin-wall bushes and turbine bearings. The low antimony content gives the best toughness and high ductility in the family, so it accommodates thin poured layers and resists shock while retaining corrosion, heat and wear resistance; hardness is about 20 HBW. The cost is the lowest strength and hardness of the three tin-based grades and therefore limited load capacity, so it is not suitable for heavy duty. It is used mainly for high-speed bushes where ductility and shock resistance matter. Keep the poured layer as thin as possible to exploit the toughness, ensure a good oil film and oil supply in service, and avoid deformation or accelerated wear from excessive load; it should not be used at high load or elevated temperature, and lining thickness must be controlled to the design. It is often used where the shaft runs fast and the load is light, and because the alloy is soft it should be protected from dirt and from abrasive contamination of the oil.
Data compiled from current standards; for selection reference only. Ordering is subject to the standard and the mill certificate.