Originally Posted by kingston

"The main application of scandium by weight is in aluminium-scandium alloys for minor aerospace industry components. These alloys contain between 0.1% and 0.5% of scandium. They were used in the Russian military aircraft, specifically the MiG-21 and MiG-29.[31]

Some items of sports equipment, which rely on high performance materials, have been made with scandium-aluminium alloys, including baseball bats[34] and bicycle frames and components.[35] Lacrosse sticks are also made with scandium. The American firearm manufacturing company, Smith & Wesson, produces revolvers with frames of scandium alloy and cylinders of titanium or carbon steel.[36][37]"


0.1-0.5% seems like marketing to me, but I'm not a metallurgist.