Chemical Composition (%)
| Sb | 11.0~13.0 |
|---|---|
| Cu | 2.5~5.0 |
| Pb | 9.0~11.0 |
| Sn | Balance |
Mechanical & Physical Properties
| Hardness | ≈29 HBW |
|---|---|
| Density | ≈7.5 g/cm³ |
Typical Applications
Grade Overview
The lowest-tin tin-based Babbitt, using lead to reduce cost, for general machinery main bearings and medium-speed, medium-load bearings. The relatively high antimony content preserves hardness and load capacity while the lead makes the alloy softer, tougher and pressure-resistant, with hardness of about 29 HBW; pouring behaviour and hot strength, however, are poorer and strength falls noticeably at high temperature. The price advantage is clear, and it suits duties where working temperature is not high and speed is moderate. Check temperature and load when specifying and avoid high-temperature or shock conditions; watch lead segregation by density and structural uniformity during pouring, and observe the environmental and compliance limits on leaded material. Because hot strength is limited, keep a margin on running temperature and avoid the shock of frequent starting and stopping. It is typically used where the bearing is large and the speed moderate, and the lining thickness should be kept uniform so the harder phases are evenly distributed and local hot spots are avoided.
Data compiled from current standards; for selection reference only. Ordering is subject to the standard and the mill certificate.