The aluminum industry has created a system using a four-digit numerical designation to identify wrought aluminum alloys. The first digit indicates the major alloying element. The second digit indicates whether there was a modification in the basic alloy. The third and fourth digit indicates the specific alloy. The following represent the various groups:
| 1XXX | Aluminum 99% or greater |
|---|---|
| 2XXX | Copper - major alloying element |
| 3XXX | Manganese - major alloying element |
| 5XXX | Magnesium - major alloying element |
| 6XXX | Magnesium and silicon - major alloying elements |
| 7XXX | Zinc - major alloying element |
EXTRUDED ALUMINUM TUBING APPLICATIONS
TRANSPORTATION INDUSTRY
MARINE INDUSTRY
SOLAR AND RENEWABLE ENERGY
BUILDING AND CONSTRUCTION (BOTH COMMERCIAL AND RESIDENTIAL)
MILITARY AND DEFENSE
ELECTRICAL BUS CONDUCTORS
COMPRESSED GAS STORAGE
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