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.
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.