Mercury Alloys

X7 Alloy

A revolutionary proprietary alloy from Mercury that shatters the rules of propeller design.

  • 30-percent stronger than conventional stainless steel
  • Four times more durable than conventional stainless steel
  • Allows prop designs that are impossible with conventional stainless steel
  • Currently on select models


An aluminum alloy so revolutionary – it’s patented

  • Specially designed for the die-casting process
  • Produces quality, porosity-free propeller castings
  • Offers increased strength and ductility


A proprietary blend of 15-5 stainless steel with incredible corrosion protection.

  • Developed specifically for Mercury Marine Propellers
  • Perfect balance of strength and corrosion resistance
  • An outstanding choice for freshwater and saltwater applications