Fe500 and Fe500D TMT bars are both types of TMT (Thermo-Mechanically Treated) steel bars, but there are some differences between them.
Fe500 TMT bars have a minimum yield strength of 500 N/mm². They are suitable for use in high-rise buildings, flyovers, and other infrastructure projects that require high strength and good ductility.
Fe500D TMT bars, also known as TMT bars with ductility, have a minimum yield strength of 500 N/mm², but they are specially designed to have better ductility than standard Fe500 TMT bars. This makes them suitable for use in areas that are prone to earthquakes or other natural disasters, as they can withstand the lateral forces and movements caused by an earthquake without breaking or collapsing.
In summary, the main difference between Fe500 and Fe500D TMT bars is that Fe500D TMT bars have better ductility than Fe500 TMT bars, which makes them suitable for use in seismic-prone areas. Fe500 TMT bars are suitable for use in high-rise buildings, flyovers, and other infrastructure projects that require high strength and good ductility.