Career
Mehl was noted for transforming of nineteenth-century metallurgy into the modern materials science. The American Institute of Mining and Metallurgical Engineers established a gold medal award in his name in 1973. the Matthewson Medal of the Metallurgical Society of the American Institute of Mining, Metallurgy, and Petroleum Engineers (five times between 1934 and 1947) Mehl was born in Lancaster, Pennsylvania. He graduate from Franklin and Marshall College in 1919.
Mehl received his Doctor of Philosophy in physical chemistry and metallurgy from Princeton University in 1924.