The SI symbol for the ton is 't', adopted at the same time as the unit itself in 1879.1 ton is equivalent to approximately 2,204.623 pounds.
It's a unit of weight/mass equal to 1000Kilograms. Its commonly referred as ton and metric ton is adopted widely by US.
Used to measure metals like tungsten and magnesium. Also in the geology textbook where it refers to tungsten.