The numbers in the different grades of TMT Bars (Fe-415, Fe-500, etc.) imply the amount of stress that the bars can withstand before they start to deform. For instance, TMT Bar Fe-500 would deform at a pressure of 550 Newton/mm2.
Billets are a semi-finished product that is extensively used in rolling mills to produce bars, wire rods, and structural steel. They are also used in machine and forge shops where engineering goods are produced.
Apex TMT bars are manufactured in a world class state-of-the-art rolling mill, ensuring excellent yield strength exceeding the values mentioned in the standard BIS. The Steel consumption depends on the strength of the bar. Higher the strength, lower will be the consumption.