B
ecause pure aluminum
is soft and has a
relatively small tensile
strength, it is alloyed with other
metals to make it stronger,
easier to weld, and to increase
its resistance to corrosive
environments. Lightweight
metals, such as alloyed
aluminum, are used in many
structural and aerospace
applications because of their
small densities (relative to
steel) and high strength-to-
weight ratios.
17
CHAPTER
ENGINEERING MATERIALS
Source:Courtesy of Boeing
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