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title: "C863 Square Bar for Sale | Specs"
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C863

# Manganese Bronze (High-Strength) Square Bar

C86300

## Overview

C86300 is a high-strength manganese bronze offering the highest combination of strength and hardness among the manganese bronze family. With tensile strengths exceeding 110 ksi and excellent wear resistance, it is used for heavy-duty structural and bearing applications. The manganese and iron additions provide exceptional toughness and shock resistance, making it the material of choice for gears, cams, and heavy-duty wear components.

### Chemical Composition

Element

Min

Max

Copper (Cu)

60.00%

66.00%

Zinc (Zn)

22.00%

28.00%

Aluminum (Al)

5.00%

7.50%

Iron (Fe)

2.00%

4.00%

Manganese (Mn)

2.50%

5.00%

### Alloy Designations

UNS C86300 

ASTM B505, B584 

Type High-Strength Manganese Bronze 

### Mechanical Properties

Tensile Strength 110 ksi (758 MPa) min 

Yield Strength 60 ksi (414 MPa) min 

Elongation 12% min 

Hardness 225 HB typical 

### Physical Properties

Density 7.83 g/cm³ (0.283 lb/in³) 

Melting Point 871–879°C (1,600–1,615°F) 

Electrical Conductivity 8% IACS 

Thermal Conductivity 37.7 W/m·K 

## Typical Applications

-   Heavy-duty gears and cams
-   Bridge pins and structural hardware
-   Screw-down nuts in steel mills
-   Heavy-duty bearings and wear plates
-   Marine hardware and fittings
-   Shock-resistant components

## Fabrication & Joining

-   Not heat treatable
-   Fair machinability — use carbide tooling
-   Not recommended for welding
-   Excellent wear and shock resistance
-   Available in solid round, rectangle, and hollow

## Need C863 Bronze Square Bar?

Contact our sales engineers for a custom quote on C863 (C86300) bronze square bar — tailored dimensions, tempers, and finishing options for your exact specifications.

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