What is C86300 Manganese Bronze?
C86300 manganese bronze is a high-strength cast copper alloy used for slow-speed, heavy-load applications. It is commonly called CDA 863, SAE 430B, high-tensile manganese bronze, or simply 863 bronze.
This alloy is chosen for strength, wear resistance, and load capacity rather than easy machining. It is commonly reviewed for heavy-duty bushings, bearings, gears, cams, hydraulic cylinder parts, marine hardware, and industrial equipment rebuilds.
Common Names and Cross References
| Name or designation | How it is commonly used |
|---|---|
| C86300 | UNS alloy designation |
| CDA 863 | Copper Development Association style designation |
| SAE 430B | Common bearing bronze designation |
| Manganese bronze | Alloy family description |
| High-tensile bronze | Common application-driven name |
Chemical Composition (%)
| Element | Minimum | Maximum | Nominal |
|---|---|---|---|
| Copper (Cu) | 60.0 | 66.0 | - |
| Zinc (Zn) | 22.0 | 28.0 | - |
| Aluminum (Al) | 5.0 | 7.5 | - |
| Manganese (Mn) | 2.5 | 5.0 | - |
| Iron (Fe) | 2.0 | 4.0 | - |
| Nickel (Ni) | - | 1.0 | - |
| Lead (Pb) | - | 0.20 | - |
| Tin (Sn) | - | 0.20 | - |
Mechanical and Physical Properties
Published values vary by casting method and section size. The following values are common for C86300 datasheets.
| Property | Typical published value |
|---|---|
| Tensile strength | 110,000 psi minimum |
| Yield strength | 62,000 psi minimum |
| Elongation | 14% minimum |
| Brinell hardness | About 223 HB |
| Fatigue strength | About 25,000 psi |
| Machinability rating | 8, based on free-cutting brass = 100 |
Fabrication and Welding Suitability
| Operation | Suitability |
|---|---|
| Machining | Difficult compared with leaded bearing bronze |
| Coated metal arc welding | Good |
| Gas shielded arc welding | Poor |
| Oxyacetylene welding | Poor |
| Brazing | Poor |
| Soldering | Poor |
Typical Applications for C86300
- Heavy-duty bushings and bearings for low-speed service.
- Gears, cams, and high-load motion components.
- Hydraulic cylinder parts and equipment rebuild components.
- Propellers, valve stems, and marine hardware.
- Industrial press and earth-moving equipment components.
RFQ Details for C86300 Parts
Send the C86300 or SAE 430B callout, load and speed conditions, dimensions, quantity, finished tolerances, lubrication details, and drawings. Because C86300 machines much harder than leaded bearing bronze, confirm whether the application truly needs high-tensile manganese bronze or can use C93200 / SAE 660 or C95400 aluminum bronze.
Available Forms
Available Forms and Shapes
Review common product forms for Manganese Bronze C86300, 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 Wear Plates
Bronze wear plates, guide strips, and graphite plugged wear plates for sliding surfaces, tooling, and heavy equipment.
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Custom CNC Bronze Parts
Custom CNC machined bronze components, bushings, lead screw nuts, wear parts, and replacement parts made from drawings or samples.
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