Metal balls are rolling, spherical elements that exhibit greater strength and toughness than plastic and ceramic balls. They have a sufficient hardness for many industrial ball applications, and most ...

Ceramic balls and sphere shapes are made of inorganic, non-metal compounds that include oxygen ... Metals and alloys can be heat-treated or tempered to produce balls and sphere shapes. Steel and ...

It was a 4,500-pound hollow steel ball about five feet in diameter ... was referred to as the "submarine balloon" because its heavy-metal ballast, attached by electromagnets, allowed it to sink ...

A TMD is a giant ball made of steel or concrete that weighs anywhere from 300 to 800 tons, and it's usually suspended in the building using springs and pistons. On a windy day, a skyscraper over ...