By John Kane, Design and Manufacturing Engineer, @MDLlab
The Aluminum materials can be separated into two categories;
a.) Aluminum that can be Brazed with other Aluminum Alloys (D712 material).
b.) Aluminum that cannot be Brazed with other Aluminum Alloys (A356 material).
Corrosion Resistance—the D712 alloy has good natural resistance to corrosion, and good additional protection is received from chemical conversion coatings.
Machinability—Alloy A356 has good machinability. Abrasiveness can be overcome and high tool wear can be minimized by using sharp, carbide-tipped tools with high rakes and clearances. Moderate to fast speeds are recommended.
Finishing—Electroplated finishes are good. Chemical conversion coatings give good protection, but anodized appearance is only fair. Mechanical finishes on A356 are good.
Ability to Weld—all common welding methods are excellent for joining this alloy. Brazing is not performed for this Alloy.
Corrosion Resistance—the A356 alloy has good resistance to most forms of corrosion.The following Tables list the compositions and the typical properties of the D712, A356 and A380 Aluminum Alloys. A380 is the most common and most cost effective Aluminum Alloy used in Die Casting.
Pictures of Aluminum Die Cast parts courtesy of Viking SATCOM.
When choosing Casting for your Microwave Waveguide system, please consult MDL on your Casting material choice. MDL’s 50+ years of experience will guide you to the appropriate choice. Future considerations should include your rate of production. D712 and A356 Castings are typically produced in low to moderate volumes. Castings produced with Die’s should only be considered in High Volume production rates (due to the expense of the Die).
Visit our website at www.mdllab.com or call 1-781-292-6684 for your casting needs.