Material datasheet · Leaded tin bronze
Bearing Bronze SAE 660
UNS C93200 · As-cast (continuous-cast bar most common)
The bushing-and-bearing default. Self-lubricating, anti-galling against steel.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Cu | 81–85 |
| Sn | 6.3–7.5 |
| Pb | 6.0–8.0 |
| Zn | 1.0–4.0 |
Applicable specifications
AMS / ASTM / MIL.
- ASTM B584
- SAE J461
- MIL-B-5687
Machining guidance
CNC parameters and tooling.
Carbide or HSS; sharp positive rake
Lead inclusions break chips well. Anti-galling against steel.
Stock & cost
Forms and Q1 2026 pricing.
- No coating typical (self-lubricating)
- Oil-impregnated (porous bronze)
Typical applications
Where C932 Bronze is the right pick.
- Bushings
- Sleeve bearings
- Valve guides
- Marine hardware
- Gear bearings
Alternative materials
Substitute or upgrade options.
- C954 aluminum bronze (higher strength)
- C863 manganese bronze
- Oilite (sintered porous)
True Precision Machining · Buellton, CA
Machine your part in C932 Bronze.
5-axis CNC · ISO 9001 · AS9100 · ITAR · CMMC-compliant · DFARS-compliant supply chain. AS9102 FAI on aerospace.
Technically reviewed by the True Precision Machining engineering team · Last reviewed June 2026
Standards referenced: ASTM B584, SAE J461, MIL-B-5687
Keep exploring
Related tools & references
Speeds, feeds, tooling, and chip strategy.
SFM, RPM, and feed rate for this material.
Compare alloys by strength, weight, temperature, and cost.
Estimate part weight from C932 Bronze stock.
Aerospace specs that call out this alloy.