What is C93700 (SAE 64) Bronze?
C93700 is a high-leaded tin bronze used for bearing applications that need conformability, embeddability, and good performance under moderate service conditions. It is commonly referenced as SAE 64 bronze, C93700 bearing bronze, or high-leaded tin bronze.
This alloy overlaps in use with other leaded bearing bronzes, and some suppliers note that C93700 may be non-stock or substituted by C93200 depending on availability and the application. Always follow the drawing or engineering specification before substituting alloys.
Common Names and Cross References
| Name or designation | How it is commonly used |
|---|---|
| C93700 | UNS alloy designation |
| SAE 64 | Common bearing bronze designation |
| High-leaded tin bronze | Alloy family description |
| Bearing bronze | General purchasing term |
Chemical Composition (%)
| Element | Minimum | Maximum | Nominal |
|---|---|---|---|
| Copper (Cu) | 78.0 | 82.0 | - |
| Tin (Sn) | 9.0 | 11.0 | - |
| Lead (Pb) | 8.0 | 11.0 | - |
| Zinc (Zn) | - | 0.80 | - |
| Iron (Fe) | - | 0.70 | - |
| Nickel (Ni) | - | 0.50 | - |
Mechanical and Physical Properties
Properties vary by casting method. The values below reflect common U.S. datasheet ranges for C93700.
| Property | Typical published value |
|---|---|
| Tensile strength | 30,000 psi minimum, sand or centrifugal cast |
| Tensile strength | 35,000 psi minimum, continuous cast |
| Yield strength | 12,000 psi minimum, sand or centrifugal cast |
| Yield strength | 20,000 psi minimum, continuous cast |
| Elongation | 15% minimum, sand or centrifugal cast |
| Elongation | 6% minimum, continuous cast |
| Brinell hardness | About 60 HB, typical sand cast |
| Density | 0.320 lb/in3 |
| Electrical conductivity | 10% IACS |
| Modulus of elasticity | 11,000 ksi |
| Machinability rating | 80, based on free-cutting brass = 100 |
Fabrication and Welding Suitability
| Operation | Suitability |
|---|---|
| Machining | Excellent |
| Soldering | Good |
| Brazing | Good |
| Oxyacetylene welding | Not recommended |
| Gas shielded arc welding | Not recommended |
| Coated metal arc welding | Not recommended |
Typical Applications for C93700
- Bearings, bushings, and bearing plates.
- Crankshaft bearing applications and large bearing components.
- Washers, slide guides, and wear parts.
- Impellers and corrosion-resistant castings.
- Large ship bearings and heavy bronze bearing service where specified.
RFQ Details for C93700 Parts
Send the exact alloy callout, casting form if specified, dimensions, quantity, load conditions, finished tolerances, certification needs, and whether substitution is allowed. If substitution is permitted, compare availability and performance with C93200 / SAE 660 bearing bronze.
Available Forms
Available Forms and Shapes
Review common product forms for C93700 SAE 64 Bronze, 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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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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Bronze Wear Plates
Bronze wear plates, guide strips, and graphite plugged wear plates for sliding surfaces, tooling, and heavy equipment.
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