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C95300 Aluminum Bronze Bushings
C95300 Aluminum Bronze Bushings – Self-Lubricating High-Strength Alloy
C95300 aluminum bronze—also designated as CAC706 / CuAl10Fe5—is a high-strength cast aluminum bronze engineered for demanding sliding, marine, and heavy-load applications. When machined with graphite plugs, C95300 self-lubricating bushings deliver reliable dry-running performance while significantly reducing maintenance.
1. Material Overview
C95300 (CAC706 / CuAl10Fe5) is known for its blend of strength, wear resistance, and excellent corrosion behavior in seawater and industrial environments. It is widely used in bushings, sliders, thrust washers, pump components, and structural bearing blocks.
2. Technical Specifications — Structured Data Table
C95300 / CAC706 / CuAl10Fe5 Material Properties
| Category | Parameter | Typical Value / Range | Notes |
|---|---|---|---|
| Grade Designations | Material Code | C95300 | ASTM B148 cast aluminum bronze |
| Equivalent Grades | CAC706 / CuAl10Fe5 | Common global designation | |
| Mechanical Properties | Tensile Strength | 450 MPa or above | High strength under heavy load |
| Elongation | 20% or above | Good ductility and toughness | |
| Hardness | 110 HB or above | Suitable for wear-intensive bushings | |
| Chemical Composition | Copper (Cu) | 82–88% | Base element |
| Aluminum (Al) | ~10% | Provides corrosion and wear resistance | |
| Iron (Fe) | ~5% | Improves hardness and fatigue resistance | |
| Friction & Lubrication | Coefficient of Friction (with graphite) | 0.1–0.2 | Enables dry-running operation |
| Lubrication Type | Solid lubricant (graphite plug option) | Minimizes maintenance | |
| Corrosion Resistance | Seawater Resistance | Excellent | Suitable for marine systems |
| Chemical Resistance | High | Resists acids, brine, industrial fluids | |
| Processing | Machinability | Good | Suitable for precision machining |
| Casting | Excellent | Supports large or complex shapes | |
| Standards | Relevant Specifications | ASTM B505 / B271 | Standard casting & bearing specs |
3. Why C95300 Aluminum Bronze Bushings Perform Exceptionally Well
High Strength for Heavy-Load Machinery
C95300 supports continuous or shock loads in machinery such as presses, hydraulic systems, and construction equipment pivot points.
Outstanding Marine & Chemical Resistance
The CuAl10Fe5 chemistry ensures long service life in seawater, brine, polluted water, and acidic industrial environments—ideal for deck machinery, ship pumps, and offshore valves.
Low Wear and Stable Sliding Behavior
Its naturally high hardness and stable microstructure reduce wear even with contaminated or intermittent lubrication conditions.
4. Self-Lubricating C95300 Bushings (Graphite-Plug Type)
Graphite-embedded solid-lubricant bronze bushings reduce friction and eliminate the need for external lubrication in demanding applications.
Advantages
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Dry-running capability
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Reduced friction: 0.1–0.2
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Maintenance reduced by 50% or more
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Excellent emergency-lubrication performance
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Long operating life under high load and low speed
Typical Self-Lubricating Applications
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Hydropower turbines: water-washed bearing pads
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Marine steering systems: continuous seawater exposure
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Heavy conveyors: 24/7 sliding guides
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Excavator hinge points: dusty, abrasive environments
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Pump thrust washers: repeated start/stop cycles
5. Comparison Table: C95300 vs. Other Aluminum Bronzes
| Property | C95300 (CAC706 / CuAl10Fe5) | C95400 | C95500 |
|---|---|---|---|
| Strength | High | Medium-High | Very High |
| Corrosion Resistance | Excellent | Very Good | Good |
| Wear Resistance | High | High | Very High |
| Self-Lubrication Compatibility | Excellent | Good | Moderate |
| Ideal Uses | Bushings, sliders, thrust washers, marine components | General bushings | Heavy structural bearings |
6. Application Examples
Marine Sliding Blocks
C95300 sliders with graphite plugs maintain smooth movement despite seawater, salt spray, or sand contamination.
Hydraulic Cylinder Eye Bushings
High load capacity and low friction prevent stick-slip motion in hydraulic equipment.
Thrust Washers in Pumps & Valves
CuAl10Fe5 thrust washers survive long cycles and dry starts without premature wear.
Steel Mill Wear Plates
Heat-resistant and abrasion-resistant properties make C95300 wear plates ideal for hot, dirty environments.
7. FAQ — C95300 Aluminum Bronze
Q1: What does CAC706 / CuAl10Fe5 mean?
It is the international designation for the same alloy as C95300, containing about 10% aluminum and 5% iron.
Q2: Can C95300 operate without oil?
Yes, especially when made as graphite-plug self-lubricating bushings.
Q3: Why use C95300 in marine equipment?
Its aluminum bronze chemistry offers exceptional seawater resistance and long service life.
Q4: Which parts use this alloy most?
Bushings, thrust washers, sliders, valve components, pump wear parts, and heavy-load mechanical joints.
Q5: How does it compare to common bronzes?
It provides higher strength, better corrosion resistance, and lower maintenance requirements.
Conclusion
C95300 aluminum bronze (CAC706 / CuAl10Fe5) delivers a superior combination of strength, wear resistance, and corrosion protection. With graphite-plug self-lubrication, it becomes one of the most reliable and maintenance-free solutions for heavy machinery, marine systems, and precision sliding components.
