Attached is the welding details that are to be made on dissimilar materials.  Can some one tell the welding procedure.

Overhang support stud, core stud & building bar are welded to Rotor end plate.

Rotor End Plate – EN19 Material
Overhang support stud – EN19 Material
Core Stud – 35C8 Material
Building Bar – S355 JR Material