Manganese Bronze
Overview
C86300 is an ultra high-strength manganese bronze — the strongest of the standard cast copper alloys. With tensile strength exceeding 110,000 psi, it is the go-to alloy for heavy-duty gears, bridge pins, and components subject to extreme loads.
As a C86300 manganese bronzesupplier, Triton Bronze & Metals stocks continuous cast bronze in round bar, flat bar, castings — all cut to length and shipped from US mills. Every order ships with a mill test report available upon request.
Chemical Composition — C86300
| Element | Content |
|---|---|
| Copper (Cu) | 60-66% |
| Zinc (Zn) | 22-28% |
| Aluminum (Al) | 5-7.5% |
| Iron (Fe) | 2-4% |
| Manganese (Mn) | 2.5-5% |
| Tin (Sn) | 0.20% max |
| Nickel (Ni) | 1.0% max |
Mechanical Properties
Physical Properties
| Property | Value |
|---|---|
| Density | 0.278 lb/in³ (7.70 g/cm³) |
| Melting Range | 1583-1693°F (862-923°C) |
| Modulus of Elasticity | 15,000 ksi (103 GPa) |
| Thermal Conductivity | 20.0 BTU/ft·hr·°F (34.6 W/m·K) |
| Coefficient of Thermal Expansion | 11.8 × 10⁻⁶ /°F (21.2 × 10⁻⁶ /°C) |
| Electrical Conductivity | 7.5% IACS |
Applicable Specifications
- ✓ASTM B505 (Continuous Cast)
- ✓ASTM B584 (Sand Cast)
- ✓ASTM B271 (Centrifugal Cast)
- ✓SAE J461 / J462
Fabrication & Joining
| Process | Rating |
|---|---|
| Soldering | Fair |
| Brazing | Not Recommended |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Fair |
Common Applications
- •Bridge pins and expansion plates
- •Heavy-duty gears
- •Screw-down nuts
- •Valve stems
- •Mining equipment
- •Rolling mill components
Frequently Asked Questions
What forms is C86300 Manganese Bronze available in?+
We supply C86300 in Round Bar, Flat Bar, Castings. All material is sourced from US mills, cut to length, and shipped directly to your facility.
What are the typical applications for C86300?+
C86300 is commonly used for bridge pins and expansion plates, heavy-duty gears, screw-down nuts, valve stems. Contact us for application-specific recommendations.
Can I get a mill test report for C86300?+
Yes. Mill test reports (MTRs) are available upon request for all C86300 orders. We can also provide material certifications to meet your quality requirements.
Is C86300 available as continuous cast bronze?+
Yes. C86300 is produced via the continuous casting process, which delivers a dense, uniform grain structure with excellent mechanical properties. Continuous cast bronze provides tighter tolerances and better surface finish than sand castings.
Dimensional Tolerances
For standard finishing allowances, diameter tolerances, and concentricity data for continuous cast bronze products, see our tolerance reference.
View Tolerances & Finishing Allowances →Need Finished Parts?
Need C86300 machined to spec? We offer custom machined parts, bronze bushings, bearings, and wear components in any alloy we stock.
View Finished Parts & Components →Available Forms
- Round Bar
- Flat Bar
- Castings
Need C86300?
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