John Frank Elliott (July 31, 1920 – April 15, 1991) was an American professor of metallurgy who made significant contributions to the science of pyrometallurgy during his long career at Massachusetts Institute of Technology (MIT).

[3] Elliott and his co-workers focused on developing understanding of the chemical thermodynamics the steelmaking process, an emphasis that he continued when returning to MIT in 1955 as an associate professor of metallurgy.

He became a full professor in 1960 and over the next three decades published over 200 papers on steelmaking, high temperature chemistry, hot corrosion of materials and principles of chemical thermodynamics and kinetics.

[2][4] Elliot's work with Sigworth on the solution behaviour of minor element in iron established an effective and relatively simple technique for predicting the outcome of steelmaking reactions.

[8] The Association for Iron and Steel Technology (AIST) have an annual lectureship award named after him that honors his contribution to the field.