In the context of TMT bars, "Fe" stands for iron, derived from the Latin word "ferrum." It indicates the primary constituent of the steel used in manufacturing TMT bars. TMT bars are typically classified by their grade, such as Fe 415, Fe 500, Fe 550, and Fe 600, where the number denotes the minimum yield strength in megapascals (MPa). Platforms like SteelonCall provide detailed infor... https://steeloncall.com/tmt-bars