Contains 5.6-6.1% zinc, 2.1-2.5% magnesium, 1.2-1.6% copper. Developed by Sumitomo Metal in 1935, reverse engineered by Alcoa in 1943. Standardized for aerospace use in 1945
Alloy is a mixture of elements, usually metallic, with controlled properties. Alloys show good electrical conductivity, ductility, and luster. Atoms join by metallic bonding rather than covalent bonds. Alloys can be classified as substitutional or interstitial based on atomic arrangement
Isaac Babbitt invented original Babbitt alloy in 1839 in Massachusetts. Babbitt metal is used as bearing surface in plain bearings. Characterized by resistance to galling and soft, easily damaged nature. Structure consists of hard crystals dispersed in softer metal
Copper alloys contain copper as their main component. They exhibit high resistance to corrosion. There are approximately 400 different copper alloy compositions
Metal is a naturally occurring chemical element found in Earth's crust. Steel is an alloy of iron with varying carbon content (0.5-1.5%). Steel is not a pure metal but a variation on one
Gold is densest metal, softest, and most malleable element. One ounce can be beaten to 187 square feet in thin sheets. Gold is highly conductive and doesn't tarnish or corrode