Factors to Consider When Specifying Round Aluminum Extrusion

When specifying round aluminum extrusion, a multitude of factors must be taken into account to ensure the optimal performance and functionality of the extruded product. These factors encompass material selection, dimensional tolerances, surface finish, and mechanical properties. By carefully considering each factor, manufacturers can optimize the extrusion process to meet their specific requirements.

Material Selection

The selection of the aluminum alloy is crucial as it determines the strength, corrosion resistance, and machinability of the extrusion. Common alloys used in round aluminum extrusion include:

– 6061: High strength, good corrosion resistance, and weldability

– 6063: Good strength, corrosion resistance, and formability

– 7075: Very high strength, but lower corrosion resistance

The choice of alloy should be based on the specific application requirements and the environmental conditions in which the extrusion will be used.

Dimensional Tolerances

Dimensional tolerances refer to the allowable variations in the dimensions of the extruded product. Tight tolerances are essential for precision applications, while larger tolerances may be acceptable for less critical applications. The following tolerances are commonly specified for round aluminum extrusion:

– Outer Diameter: +/-0.005 inches

– Wall Thickness: +/-0.003 inches

– Length: +/-0.010 inches

Manufacturers should work closely with the extrusion supplier to determine the appropriate tolerances for their specific application.

Surface Finish

The surface finish of the extruded product can range from a mill finish to a highly polished finish. The following surface finishes are commonly available:

– Mill Finish: As-extruded surface with no additional treatment

– Anodized: Electrolytic process that creates a protective oxide layer

– Powder Coated: Application of a powder coating for corrosion resistance and aesthetics

The choice of surface finish depends on the desired appearance, corrosion resistance, and functionality of the extrusion.

Mechanical Properties

The mechanical properties of round aluminum extrusion include tensile strength, yield strength, and elongation. These properties determine the ability of the extrusion to withstand various types of loading. The following mechanical properties are typically specified for round aluminum extrusion:

– Tensile Strength: Minimum 30,000 psi

– Yield Strength: Minimum 25,000 psi

– Elongation: Minimum 10%

The required mechanical properties should be based on the anticipated loads and operating conditions of the extrusion.

Conclusion

By considering the factors discussed above, manufacturers can specify round aluminum extrusion that meets their specific requirements for strength, corrosion resistance, dimensional accuracy, surface finish, and mechanical properties. Proper extrusion specification ensures optimal performance, reliability, and longevity of the extruded product.