 "Hamner" was launched on 24 November 1945 by the Federal Shipbuilding and Drydock Company, Port Newark, New Jersey; sponsored by Mrs. Henry Rawlings Hamner, wife of Lt. Hamner; and commissioned on 12 July 1946, Commander Joseph B. Swain in command.After shakedown in the Caribbean Sea, "Hamner" reported to the Pacific Fleet on 24 December 1946 and immediately departed for her first deployment with the 7th Fleet.The destroyer spent nine months operating with Destroyer Division 111 out of various Chinese and Japanese ports before returning to the States for six months of training operations.