The proper grade of aluminum alloy is significant in different jobs and applications, as the grade of aluminum helps determine its use. For example, marine grade aluminum means a specific alloy that resists corrosion, and does not deform easily. Alloys in the 5000 series as well as some 6000 are considered marine grade. Aluminum is graded by the aluminum profiles supplier for its content and heat treatment. Aluminum grades are classified into eight graded categories, from the 1000 series to the 8000 series. Generally, the higher the grade of aluminum is, the higher its quality will be. The grade of aluminum can make an influence on the materials appearance, fabrication abilities, corrosiveness, welding properties, weight as well as strength.
Before choosing the different types of aluminum alloy, people should determine the requirements that they are looking for concerning the grade of aluminum. For example, the grade of aluminum required for siding the house will be very different from the aluminum required to build parts for an aircraft.
Then people should have a good command of the knowledge of different grades of aluminum by series. Following are the introductions on different aluminum alloy series for reference: the 1000 series is resistant to corrosion, conducts electricity and heat well, and is easy to work with; the 2000 series is commonly used in aircraft, is a strong metal but less resistant to corrosion than the other grades; the 3000 series is approximately 20 percent stronger than the 1000 series, and is non-heat treatable; the 4000 series has a low melting point and is infused with silicon, and is typically used in welding wire to join other pieces of aluminum; the 5000 series has a high degree of magnesium and is a harder variant of aluminum -- this grade is popular to use for ships due to its resistance to corrosion; the 6000 series contains magnesium and silicon, giving it medium strength, good resistance to corrosion, and machinability; the 7000 series is infused with zinc, giving it a moderate to very high strength -- this series is commonly used in aircraft frames; the 8000 series displays exceptionally high strength and connectivity, and was developed specifically for aerospace applications. The right choice of the aluminum alloy is very important. For example, if you are working on a boat, then you’ll likely choose the 5000 series of aluminum. Or, if you’re making a specialized part that requires a more malleable grade of aluminum, then you’ll likely choose the 6000 series.
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