Difference Between Fe 500 & Fe 550D TMT Grade Bars

Fe 500 and Fe 550 TMT Grade Bars are both used for making steel. Both are high-strength steels that can be used for a variety of industrial projects. However, the processes used to produce them, and their chemistry are completely different.

The main difference between Fe 500 TMT Grade Bar and Fe 550D TMT Grade Bar is the strength of the material. The Fe 500 TMT Grade Bar is designed to withstand a minimum strength of 500 MPa. While the Fe 550D TMT Grade Bar is designed to withstand a minimum strength of 550 MPa.

What is Fe 500 TMT Grade Bar

Fe 500 TMT Grade Bar is a grade of steel that is used in the construction industry. It has high yield strength. And it is extremely good in toughness and ductility.

Specifications That Make All the Difference

The tensile strength of Fe 500 TMT Grade Bar is 8% more than 0.2% PS, but not less than 545.0 N/mm2.

What does Fe 500 mean? The Fe denotes that it is made of iron. The numerical figure 500 stands for their minimum yield strength in N/mm2.

Chemical composition of Fe 500 TMT Grade Bar: It is Iron mixed with some amount of carbon (0.3%), sulphur (0.055%), phosphorus (0.055%) materials by mass and S+P is about 0.105%.

Mechanical Properties of Fe 500 TMT Grade Bar

1) Their yield strength (fy) is 500N/mm2,
2) Ultimate tensile strength (fu) is 545N/mm2
3) Elongation is 12
4) TS/YS ratio is 1.09.

This grade of TMT bar is suitable for construction of multiple storey and commercial buildings. And it is resistant to corrosion.

What is Fe 550D TMT Grade Bar

Fe 550D TMT Grade Bar: Fe 550D TMT Grade Bar is a high-grade alloy steel that is used to make bars, rods and structural shapes. It is high in strength and hardness. And thus, makes them the ideal choice for industry constructions purposes.

The tensile strength of Fe 550D TMT Grade Bar is 6% more than 0.2% PS, but not less than 585.0 N/mm2.

What does Fe 550D mean? Fe denotes that it is made of iron. The numerical figure 550D stands for their minimum yield strength in N/mm2.

Chemical composition of Fe 550D TMT Grade Bar: Iron mixed with some amount of carbon (0.25%), sulphur (0.04%), phosphorus (0.04%) materials by mass and S+P is about 0.07%.

Mechanical Properties of Fe 550D TMT Grade Bar

1) Their yield strength (fy) is 550N/mm2
2) Ultimate tensile strength (fu) is 585N/mm2
3) Elongation is 16
4) TS/YS ratio is 1.08

This grade of TMT bar is suitable for large-scale projects like bridge and construction of heavy underground structure.

What Kind of Projects Are They Suited for?

FE 500 Grade

  •  It is regarded as a standard in the market across many types of construction projects.
  • Fe 500 Grade has good stability, and security in terms of earthquake resistance but less in ductility.
  • They are also used for the construction of multi-storeyed buildings, business complexes and private ventures.

FE 550D Grade

  • The tensile strength of these bars is much more, which makes them ideal for construction projects that have more arenas.
  • Fe 550D grade TMT can be used for mechanical undertakings, scaffolds and other structures that need to endure a lot of weight.
  • They are ideal for underground construction projects, marine projects, beachfront properties and more.
  • Fe 550D grade has ductility and flexibility and has an elongation as per IS 1786