C863 manganese bronze is a copper alloy with high strength and good corrosion resistance, even when exposed to seawater.
C863 bronze is composed of 60-66% copper, 22-28% zinc, 5.0-7.5% aluminum, and 2.5-5.0% manganese. The addition of manganese increases its wear resistance and anti-galling properties. Its tensile strength is comparable to some grades of steel, and its ductility is good, but its electrical and thermal conductivity are relatively low compared to other copper-based alloys.
C863 bronze is used extensively in marine, heavy industrial, and civil engineering applications. It performs well in low-speed, heavy-duty bearing and bushing applications, and offers excellent wear resistance. C86300 should be used in conjunction with hardened steel shafts. It does require lubrication in service to ensure durability.
| Property | Value | Notes |
|---|---|---|
| Material Type | Copper-zinc-aluminum-manganese alloy | UNS C86300 |
| Density | 0.283 lb/in3 | |
| Melting Point | ~885-923 °C | ~1,625-1,693 °F |
| Hardness (Brinell) | ~223-225 | |
| Tensile Strength | ~758-820 MPa | ~110,000-119,000 psi |
| Yield Strength | ~427-460 MPa | ~62,000-66,700 psi |
| Elongation at Break | ~14-18% | |
| Modulus of Elasticity | ~97.9-117 GPa | ~14.2x106 – 17.0x106 psi |
| Corrosion Resistance | Good | Resists attack by seawater |
| Magnetism | Non-magnetic | |
| Heat Treatment | Not feasible | |
| Machinability | Lower than other copper alloys | Comparable to an alloy steel |
| Weldability | Poor gas metal arc, poor brazing and soldering | Can be done with coated metal arc welding |
With decades of experience and strong mill relationships, we’re more than just a distributor—we’re your trusted partner. Let us help you find what others can’t.
