Fe 550 And Fe 550d TMT Steel Bars: Which One To Choose?

Fe 550 And Fe 550d TMT Steel Bars

The TMT bar manufacturers in India generally supply four different grades of TMT rebars – Fe-415, Fe-500, Fe-550, and Fe-600. All these numbers specify the level of stress that is necessary to deform it, and the higher grades state that the bar is stronger and superior than others. Each of them has distinct specifications and usage. But, when we talk about constructing residential homes or commercial buildings, the constructors prefer 550d steel bars or Fe 500 TMT bars. 

But do you want to know what is the reason behind their hype? Well, this blog is just for you! Here, we have discussed the unique advantages of Fe 550 and Fe 550D TMT steel bars in the Indian market. 

Fe 500 TMT Grade Bar

The construction industry particularly uses the Fe 500 TMT Grade Bar because of its high yield strength, extreme toughness, and ductility.

Specifications Make All the Difference

The tensile strength of the Fe 500 TMT grade bar is closer to 8% and more than 0.2% PS but not less than 545.0 N/mm2.

But what does Fe 500 mean? Fe is the chemical term of iron, and the numerical figure 500 states their minimum yield strength in N/mm2.

Fe 500 TMT Grade Bar Chemical Composition:

The iron gets mixed with the following compositions:

  • Carbon (0.3%)
  • Sulphur (0.055%)
  • Phosphorus (0.055%) 

Fe 500 TMT Grade Bar Mechanical Properties 

  • Yield strength (fy) – 500N/mm2
  • Tensile strength (fu) – 545 N/mm2
  • Elongation – 12
  • TS/YS ratio – 1.09

Therefore, the Fe 500 TMT bar is best for constructing multiple-storey and commercial buildings as it beholds corrosion and fire-resistant properties as well. 

Fe 550D TMT Grade Bar

Now let’s learn about Fe 550D TMT rebars. This high-grade alloy steel is useful for making bars, rods and structural shapes, and compared to Fe 500D it is superior in strength and hardness. Therefore, it’s a suitable choice for industry construction and building purposes. 

The tensile strength of Fe 550D TMT Grade Bar is 6% higher than that of 0.2% PS, but it’s always at least 585.0 N/mm2. Here, 550D stands for minimum yield strength in N/mm2.

Fe 550D TMT Grade Bar Chemical Composition

The following elements are being mixed to form Fe 550D steel bars:

  • Carbon (0.25%)
  • Sulphur (0.04%)
  • Phosphorus (0.04%) 

Fe 550D TMT Bar Mechanical Properties

  • Yield strength – 550N/mm2
  • Tensile strength (fu) – 585 N/mm2
  • Elongation – 16
  • TS/YS ratio – 1.08

That’s why if you are looking for the best quality 550D steel bars, make sure to choose a trusted manufacturer. Only then, they are suitable for large-scale projects like bridges and construction and even heavy underground structures.

Applications Of Fe 500 and Fe 550D Grade TMT Steel Bar

Fe 500D Grade

Now that we have learned the details of Fe 500 and Fe 500D grade rebars, let’s study their usage in the construction industry:

  • The design and formulation of Fe 500 make it a standard quality in the market for different construction projects like schools, universities, offices, bridges, and more.
  • Due to their good stability and security features, they are good for earthquake-prone areas but are less ductile.
  • The constructors also use FE 500D for building multi-storeyed buildings, business complexes, roads, and private ventures.

Fe 550D Grade

  • As the tensile strength of these bars is comparatively greater, they are ideal for building projects with more arenas.
  • 550D grade TMTs are useful for mechanical undertakings, scaffolds and other structures. 
  • As per IS 1786, Fe 550D grade has ductility and flexibility with an elongation property, making it useful for underground construction projects, marine projects, beachfront properties and more.

You may read: Know Your TMT Bars: An In-Depth Explanation Of The Manufacturing Process

Final Words

Hopefully, you have understood the difference between Fe 550 And Fe 550d TMT Steel Bars. Now, which one you will pick will depend on your neFe 550 or eds. However, for final verification make sure to consult with the TMT bar supplier. Best of luck!

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