Morse taper is typically used on tool steels. Has it been tried with a stainless-bronze interface? The reason for the corrosion resistant materials is, the connection will be underwater for awhile and we hope to be able to get it apart. But will the torque resistance work between bronze and...
also in EM1110-2-2703, plate B-90 that is a Corps of Engineer manual available on the web, there is implied a factor of 2 times yield for allowable hertz stress, wheel on rail
Rail-wheel allowables from 1.6 to 2.0 times the UTS of the softer material, i think are in DIN (German) standards. Also quoted in Hydraulic gates and Valves by Jack Lewin