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Development and Application of New Alloy AA2013

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Development and Application of New Alloy AA2013

Katsuya Kato, Tadashi Minoda, and Hideo Sano,
Light R& D Center, Sumitomo Metal Industries, Ltd., Nagoya, Japan


ABSTRACT—The AA2024 alloy has higher strength and superior fatigue properties,
and therefore, this alloy has various uses. However, it has a lower extrudability, and the
port-hole extrusion process cannot be applied to this alloy. On the other hand, 6xxx
aluminum alloys have a higher extrudability, and can be extruded into hollow shapes
using a port-hole die. However, the strength of the 6xxx alloys is lower than that of the
AA2024 alloy. As a solution to this problem, we developed the new alloy AA2013 for
extrusion. The specified strength of AA2013-T6511 is higher than that of
AA2024-T3511. The fatigue strength of AA2013-T6511 is almost the same as that of
AA2024-T3511, while the fatigue crack propagation rate is lower than that of
AA2024-T3511. The AA2013 alloy has an extrudability that is superior to that of the
AA2024 alloy, and it can be produced in complex shapes using the port-hole die.
Hollow-shape extrusions using the AA2013 alloy can make integrated constructions
possible; therefore, assembly costs can be reduced. The properties of the AA2013 alloy
were registered with the Metallic Materials Properties Development & Standardization
(MMPDS), in order to use this alloy for aerospace applications. The application of the
AA2013 alloy is currently increasing, not only for aerospace applications, but also for
general uses.

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