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Tune in to How Its Made Fridays @ 9pm | For more, visit http://science.dis covery.com/tv/how- its-made | Stainless steel was invented in the early 20th (more)

Tune in to How Its Made Fridays @ 9pm | For more, visit http://science.discovery.com/tv/how-its-made | Stainless steel was invented in the early 20th century. The key ingredient, chrome, forms a protective oxide film on the surface. In this minisode of How It's Made, find out how shiny stainless steel material is made.

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