They do not, in fact, demand similar alloys. A hydro power turbine operates with liquid water, a steam turbine with superheated, corrosive steam. A Pelton whee

They do not, in fact, demand similar alloys. A hydro power turbine operates with liquid water, a steam turbine with superheated, corrosive steam. A Pelton wheel is fundamentally different in every detail from a steam turbine. Useful Pelton wheels have been made in village smitheries. They are readily mass-produced, and last many decades without need for service.