The alloy which is available in plate form is for high strength and damage tolerant applications where low density, high stiffness and excellent corrosion resistance is required.
The addition of lithium in the alloying process increases the strength and modulus of the material while lowering the density. Alloy 2070 aluminium lithium plates are available in thickness from 50.8mm to 165mm (2 to 6.5 inches), supplied in the T8E57 temper.
Applications for 2070-T8E7 aluminium lithium plate include:
Alloy 2070-T8E57 plate has shown comparable fracture toughness and fatigue (smooth and open hole) to the 7050 T7451 plate product. Fatigue crack growth in L-T and T-L orientations across gauges is generally improved compared to 7050 T7451 plate product.
The material grade has shown excellent resistance to exfoliation corrosion and stress corrosion cracking in alternate immersion (ASTM G47) and seacoast environments.
Benefits of using this alloy include:
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