What is C93200 (SAE 660) Bronze?
C93200 bearing bronze, commonly known as SAE 660, CDA 932, 660 cast bronze, or high leaded tin bronze, is the standard cast bronze alloy for general-purpose bearing and bushing applications. It combines good strength, excellent machinability, good wear resistance, and reliable anti-friction behavior under moderate loads and speeds.
Because C93200 contains lead, it machines cleanly and has good embeddability and conformability in bearing service. It is commonly specified for sleeve bushings, thrust washers, bearing plates, pump bushings, machine tool bearings, and replacement parts where dependable bronze performance matters more than maximum strength.
Common Names and Cross References
| Name or designation | How it is commonly used |
|---|---|
| C93200 | UNS alloy designation |
| SAE 660 | Common bearing bronze name in U.S. purchasing and maintenance |
| CDA 932 | Copper Development Association style designation |
| High Leaded Tin Bronze | Alloy family description |
| 660 Cast Bronze | Common stock and distribution name |
Chemical Composition (%)
| Element | Minimum | Maximum | Nominal |
|---|---|---|---|
| Copper (Cu) | 81.0 | 85.0 | 83.0 |
| Tin (Sn) | 6.3 | 7.5 | 7.0 |
| Lead (Pb) | 6.0 | 8.0 | 7.0 |
| Zinc (Zn) | 1.0 | 4.0 | 2.5 |
| Nickel (Ni) | - | 1.0 | - |
| Iron (Fe) | - | 0.20 | - |
| Antimony (Sb) | - | 0.35 | - |
| Phosphorus (P) | - | 0.15 | - |
Mechanical and Physical Properties
Published values vary by casting method, size, and specification. The following figures are commonly used for engineering review of cast C93200 / SAE 660 bearing bronze.
| Property | Typical published value |
|---|---|
| Tensile strength | 35,000 psi minimum |
| Yield strength | 20,000 psi minimum |
| Elongation | 10% in 2 in. |
| Brinell hardness | 55-70 HB |
| Machinability rating | 70, based on free-cutting brass = 100 |
| Density | 0.322 lb/in3 |
| Modulus of elasticity | 14,500 ksi |
Fabrication and Welding Suitability
| Operation | Suitability |
|---|---|
| Machining | Excellent |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene welding | Not recommended |
| Arc welding | Not recommended |
Typical Applications for C93200
- Sleeve bushings, flanged bushings, and general bearing sleeves.
- Thrust washers, bearing plates, and wear surfaces.
- Main spindle bearings and machine tool bearings.
- Pump bushings, fuel pump bushings, and water pump bushings.
- Linkage bushings, press components, and industrial replacement parts.
RFQ Details for C93200 Parts
Send the alloy callout, OD, ID, length, quantity, stock or finished-part requirement, tolerances, lubrication grooves, certification needs, and any drawing or sample information. If C93200 is not strong enough for the load, compare it with C95400 aluminum bronze or C86300 manganese bronze.
Available Forms
Available Forms and Shapes
Review common product forms for C93200 Bearing Bronze (SAE 660), then send drawings, dimensions, quantity, and finished-part requirements for material and production guidance.
Bronze Solid Bar
Bronze solid round bar and rod stock for machining bushings, bearings, pins, spacers, gears, and custom bronze parts.
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Bronze Cored Bar
Bronze cored bar and hollow bar stock for efficient machining of sleeve bushings, bearings, rings, and bronze components.
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Plain Bronze Sleeve Bushings
Plain bronze sleeve bushings and cast bronze sleeve bearings in C93200 SAE 660 and alternative alloys for radial load applications.
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Flanged Bronze Bushings
Flanged bronze bushings and cast bronze sleeve bearings with an integral thrust face for radial support and axial location.
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Bronze Thrust Washers
Bronze thrust washers and bearing washers machined from C93200 SAE 660 and high-strength bronze alloys for axial load support.
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