ASME B31.3 SECTION 302.3.2.D STATES THAT "IN THE APPLICATION OF THESE CRITERIA (DESIGN CRITERIA/ALLOWABLE STRESS IN TABLE A-1) THE YIELD STRENGTH AT ROOM TEMPERATURE IS CONSIDERED TO BE SyRy AND THE TENSILE STRENGTH AT ROOM TEMPERATURE IS CONSIDERED TO BE 1.1StRt"....WHAT DOES Ry AND Rt STANDS FOR IN THIS RELATION?....

THANKS IN ADVANCE.....

See Appendix J (Nomenclature), page 267 for the explanation of these two terms.