What Is The Difference Between Fe500 And Fe500D TMT Bars?


Thermo-mechanically Treated bars or TMT bars are a necessity for a strong construction. These bars are exposed to the process of quenching and followed by exposure to jets of cool water, which hardens their outer surface leaving the inner core extremely hot. This process results in supreme ductility and malleability of these bars, which is idle for any building. TMT bars are seismic resistant and all over makes the whole structure safe and rock solid. There are various types and companies of TMT bars. However, it is essential to know where to invest your money into. One must choose the correct bar for the construction. Any individual planning to build a property in their own city, for example, Kolkata, should opt for the Best TMT bar in West Bengal to build their dream project without compromising the quality.

There are various grading of these TMT bars depending upon the steel which is used in the manufacturing process. Out of several varieties, the two of the really popular types are the Fe500 and Fe500D grading TMT bars. Fe represents the iron that is utilised in assembling the TMT bars, while 500 represents the most extreme yield stresses it can hold up to. Both Fe550 and Fe500D TMT bars are extensively used for the construction process. Greater the grading of the TMT bar more prominent are the qualities, and less is the utilisation of iron. Each grade bar is utilised for a special purpose.

Here are is a comparative study of the two types of TMT bars being discussed:

  • Both Fe500 and Fe500D bars have the same rigidity, but they are distinctive in their flexible element. Greater flexibility more is the prolongation ability and hence a longer life cycle for the construction. The elongation capacity for Fe500 is 12%, whereas, for Fe-500d, the elongation is 18%.
  • Both Fe500 and Fe500D TMT bars have 0.2% stress/yield, whereas the tensile strength increases by 2%. The base elasticity for Fe500 is 545 mpa and for Fe500D is 565 mpa.
  • Chemical composition-wise, Fe500D has 0.25% carbon, whereas Fe500 has a maximum of 0.30% carbon. The levels of phosphorus and sulphur are lower in Fe500D. The Fe500D TMT bars have lower quantities of carbon, phosphorus and sulphur, which helps preserve the steel for a longer period of time, and it also helps in opposing seismic tremors in future.
  • Fe500D boasts higher flexibility which is a great option for developing structures in the seismic zones as higher malleability helps the structure stand strong during a tremor. The symbol D stands for ductility. It also has higher pliability, which is an important feature for general construction purposes. Hence, it is the most favoured TMT bar in higher systemic zones. If you are planning to procure TMT bars in Kolkata, you should ideally do that from the Top TMT bar companies in West Bengal.

Fe500D and Fe500 steel determination bars are created carefully by fabricating processes making them super bendable and capable of forming a strong structure when used with cement. Concrete has an extraordinary compressive power but low elasticity and flexibility. TMT bars offers these two features two the structure and make the set stronger and safer. Both Fe500 and Fe500D are excellent choices for heavy structure constructions. Concast Maxx is one of the best TMT bar manufacturers in Kolkata that manufactures both varieties of supreme quality.