Samuel Thomas Wellman, (February 5, 1847 – July 11, 1919) was an American steel industry pioneer, industrialist, and prolific inventor. Charles M. Schwab of Bethlehem Steel described Samuel T. Wellman as "the man who did more than any other living person in the development of steel". Wellman was a close friend of electrical pioneer George Westinghouse, and he was also president of the American Society of Mechanical Engineers from 1901 to 1902.