Aluminum has become a common part of our every day lives. We find it in cans, foil, cooking utensils, storage containers, and more. It’s easy to take aluminum for granted when it’s so prevalent in products today, so we’d like to take some time to appreciate the uniqueness of 2219 alloy.
Since you find aluminum pretty much everywhere, it’s worthwhile to note that this particular aluminum alloy is something totally different from the rest. Unlike your run of the mill aluminum alloy, it comes from the wrought aluminum-copper family, and is 93% aluminum and 6.3% copper. It also contains small amounts of other metals including zirconium and titanium.
This metal is known for its ability to withstand extremely high temperatures, making it a suitable material for aerospace applications. In fact, this metal alloy can withstand temperatures of about 200 to 250°C. Reducing the temperature to subzero temperatures will strengthen it. It’s also age-hardenable because of its copper component.
The metal is used to manufacture aerospace components including fuel tanks, space boosters, and the sections of aircraft that get particularly hot. This metal alloy has high fracture resistance. 2219 aluminum are also known for their high resistance to corrosion and cracking.
Aluminum and its alloys can be machined while in annealed condition using oil-base lubrication. It must be annealed at 538°C (1000°F) for sufficient time, and then quenched in cold water. This should be done in place of heat treating. When it’s been heat treated, this aluminum alloy is difficult to machine. Forging this alloy helps it to maintain its heat resistant property.
The 2219 alloy can be welded with resistance welding or inert welding, as long as the welder takes precautions in order to prevent it from cracking. The welding process should be followed by heat treatment so that the alloy maintains its corrosion resistance. You can heat treat it at 538°C (1000°F)and then quench it in cold water.
This aluminum alloy offers strength and durability like no other alloy. It’s practical use in aerospace engineering and elsewhere is proof of its staying power.