This WRC Bulletin 315 complements WRC Bulletin 277, issued in May 1982.Together, these Bulletins address the creep properties of 2 1/4 Cr 1-Mo steel weld metal deposited with several different welding processes.They contain data obtained from the literature as well as from the many tests conducted on this program.The experimental data, in both reports, are for weld metal of several different carbon contents postweld heat treated at either of two commonly used postweld heat treating temperatures.The welding processes for the experimental work reported in Bulletin 277 were electroslag and submerged arc.Whereas the process for the experimental work in this Bulletin is shielded metal arc (covered electrodes).The extensive literature review provided data for each of these three processes, as well as for other welding processes.