There are literally hundreds of different alloys designed to meet a wide range of needs and they are identified by the Aluminum Association Classification System. Of these alloys, only the 6000 and 7000 series are commonly used in producing lacrosse sticks. One comment about the alloy series, it is sometimes assumed that the higher the number, the “better” the alloy is. This is not correct; actually the series designations refer to the materials that are used to produce a particular alloy. For example, the 8,000 series alloys are not automatically “better” than a 6,000 or 7,000 series and may not be suitable for a particular application.
6000 Series are high strength alloys and are relatively easy to form and extrude and can be heat treated. This makes them a very good choice for lacrosse sticks.
7000 Series are generally the highest strength alloys and can also be heat treated. They can be a very good choice for lacrosse sticks but compared to 6000 Series, the alloys are more costly and can be more difficult to form which explains the typically higher cost of sticks made with 7000 Series alloys.