What type of aluminum is my prop?

[Facility Dude]

I have a 1981 70hp Evinrude and have a couple of dings in my prop, I have someone that has all the equipment to repair and ballance, but he's aking what type of aluminum it's made out of.
It's a Michigan Wheel 13.25x17 with the number 8823 on it.

Any body know.........????

Thank You

[boats.net]

Never been ask that before and not sure, probably have to contact Michigan Wheel for that information.

[Facility Dude]

Answer -

Called Michigan Wheel and they called me back......714 Alloy....for those out there that want to know and in case someone asks in the future.

Thanks