On 30 January 1930
Isthmian Steamship Company was organized separately from US Steel which retained the ships
Steel Chemist,
Steel Electrician,
Steelmotor, and
Steelvendor. Isthmian Steamship Company acquired the ships: •
Anniston City (April) •
Crofton Hall (April) •
Mobile City (April) •
Steel Exporter (April) •
Atlanta City (May) •
Chattanooga City (May): Sunk by 20 February 1943. •
Steel Seafarer (May): 1921–1943. Sunk by seaplane in 1943. •
Steel Traveler (May): 1922–1944. Sunk by mine in 1944. •
Steel Inventor (June): 1920–1954. Collided with (rammed) and sunk
USS Woolsey in 1921. •
Steel Scientist (June): Operated as the transport ship 1944–1947. •
Steel Trader (June) •
Steel Voyager (June) •
Memphis City (July) •
Montgomery City (July) •
San Francisco (July) •
Steel Age (July) •
Steel Engineer (July) •
Steel Mariner (July) •
Tuscaloosa City (July) •
Bessemer City (August) •
Birmingham City (August) •
Ensley City (August) •
Knoxville City (August) •
Steelmaker (August) •
Chickasaw City (September) •
Fairfield City (September) •
Steel Ranger (September) •
Steel Worker (September) •
Selma City (October) was bought in 1947, renamed
Steel Director, and operated until sold to the
States Marine Lines in 1956, where she continued operating under the same name until scrapped in 1971. The company would continue to expand its operations in the ensuing decades. In 1956 however, the by then highly lucrative company, then under retired Vice admiral
Glenn B. Davis, was sold to States Marine Lines. US Steel justified the sale on the grounds that Isthmian's overall usefulness had diminished, as it now carried only a fraction of the corporation's exports. It continued to operate as a property of States Marine until the early 1970s. Its last list of corporate officers is dated 1974. ==Other ships==