RE: Rebar property data in SAP2000Sap2000 uses Fye at least for auto plastic hinge calculation according to FEMA 356. Formulas in FEMA are with expected yield strength, read 5.3.2.1.2 page 5-2 Nominal Properties, and table 5-3 for conversion factor Fy*x=Fye. You may check with an auto hinge for steel frame section yield bending moment=plastic modulus*Fye.