QAL9-4 brass bushings with graphite are a type of self-lubricating bearings that incorporate graphite as a lubricant to enhance their performance under various operating conditions. The QAL9-4 brass alloy itself is known for its good mechanical properties and corrosion resistance, but the addition of graphite further improves its wear resistance and reduces the need for external lubrication.
Benefits of Graphite in QAL9-4 Brass Bushings
Self-Lubrication: Graphite particles embedded in the brass matrix provide a dry lubricant that reduces friction and wear, especially in applications where lubrication may not be readily available or where frequent lubrication is undesirable or impractical.
Improved Wear Resistance: The presence of graphite increases the bearing’s ability to withstand wear, extending the service life and reducing the need for maintenance or replacement.
Reduced Friction: Graphite is known for its excellent lubricating properties, which help to minimize friction between moving parts, recognized to smoother operation and reduced energy consumption.
Operational Efficiency: The self-lubricating nature of graphite-embedded bushings allows for more efficient operation in environments where high temperatures, high pressures, or corrosive substances are present.
Versatility: These bushings can be used in a wide range of applications, from automotive and industrial machinery to heavy equipment and marine engineering, where high performance and low maintenance are required.
The closest alloys to QAL9-4 in terms of ASTM B505 and European Standard EN 1982, we first need to clarify what QAL9-4 refers to in the context of alloy standards.
QAL9-4 is a designation commonly used in China for a copper-aluminum alloy, also known as Aluminum Bronze. This alloy typically contains about 9% aluminum and 4% iron, with the rest being primarily copper. It’s known for its high strength and excellent corrosion resistance, particularly in marine environments.
For ASTM B505, a similar aluminum bronze alloy would likely be one of the C95400 series, which are aluminum bronzes with approximately 9% aluminum. These alloys are known for their high strength and resistance to wear and corrosion.
For EN 1982, the closest equivalent might be the CC333G alloy, which is an aluminum bronze with a similar composition. This European standard specifies aluminum bronze with high tensile strength and good resistance to corrosion and wear.
Here’s a simplified overview:
| Alloy Specification |
Alloy Name |
Description |
| ASTM B505 |
C95400 |
An aluminum bronze alloy, known for high strength and excellent corrosion resistance, typically used in heavy-duty applications. |
| EN 1982 |
CC333G |
An aluminum bronze similar to QAL9-4, offering high strength, excellent wear and corrosion resistance, suitable for similar applications as ASTM C95400. |
These specifications are based on the general characteristics of QAL9-4 and might include slight variations in minor alloying elements that tailor the material properties for specific applications.
