Lead Brass is a copper-zinc alloy that contains a small percentage of lead, typically ranging from 1% to 4%, to improve machinability without significantly affecting corrosion resistance or strength. This alloy is widely known for its excellent free-cutting properties, making it ideal for high-speed machining and precision components.
The lead content acts as a lubricant, reducing tool wear and improving chip breaking, which makes it especially suitable for automatic lathes and CNC machining.
| Alloy Grade | Cu | Pb | Al | Fe (max) | Sn | Zn | Impurity Total |
|---|---|---|---|---|---|---|---|
| HPb63-3 | 62.0-65.0 | 2.4-3.0 | - | 0.1 | - | REM | 0.75 |
| HPb63-0.1 | 61.5-63.5 | 0.05-0.3 | - | 0.15 | - | REM | 0.5 |
| HPb62-2 | 60.0-63.0 | 1.5-2.5 | - | 0.15 | - | REM | 0.65 |
| HPb60-3 | 58.0-61.0 | 2.5-3.5 | - | 0.3 | 0.3 | REM | 0.8 |
| HPb59-1 | 57.0-60.0 | 0.8-1.9 | - | 0.5 | - | REM | 1.0 |
| HPb58-3 | 57.0-59.0 | 2.5-3.5 | - | 0.5 | 0.5 | REM | 1.0 |
| HPb57-4 | 56.0-58.0 | 3.5-4.5 | - | 0.5 | 0.5 | REM | 1.2 |
| C3601 | 59.0-63.0 | 1.8-3.7 | - | 0.3 | Fe+Sn:0.5 | REM | - |
| C3602 | 59.0-63.0 | 1.8-3.7 | - | 0.5 | Fe+Sn:1.0 | REM | - |
| C3603 | 57.0-61.0 | 1.8-3.7 | - | 0.35 | Fe+Sn:0.6 | REM | - |
| C3604 | 57.0-61.0 | 1.8-3.7 | - | 0.5 | Fe+Sn:1.0 | REM | - |
| C3605 | 56.0-60.0 | 3.5-4.5 | - | 0.5 | Fe+Sn:1.0 | REM | - |
| CW602N | 61.0-63.0 | 1.7-2.8 | 0.05 | 0.1 | 0.1 | REM | Ni 0.3 others total 0.2 |
| CW614N | 57.0-59.0 | 2.5-3.5 | 0.05 | 0.3 | 0.3 | REM | Ni 0.3 others total 0.2 |
| CW617N | 57.0-59.0 | 1.6-2.5 | 0.05 | 0.3 | 0.3 | REM | Ni 0.3 others total 0.2 |
| C36000 | 60.0-63.0 | 2.5-3.0 | - | 0.35 | - | REM | - |
| C36010 | 60.0-63.0 | 3.1-3.7 | - | 0.35 | - | REM | - |
Usage: Used in spare parts with hot-drawability and cutting manufacturing technique, such as bolts, shims, screw caps, gaskets, linings, etc.
The main characteristics: With excellent machinability, good performance in cutting, good corrosion resistance, and with good processing in cold & hot working, easy to join and braze.
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