What Is the Difference between T and Y steel bars?


The strength of any construction lies in its foundation. Earlier, builders preferred concrete, which used to be strong in compression but defenseless against tension. Then, the construction sector came across TMT or Thermo Mechanically Treated Steel Bars with technological advancement. Highly tensile strength and durability, along with many other features, make these TMT bar Kolkata are the backbone of any structure. So, when we talk about strength, two important words, T and Y steel bars, come into the picture. Let us unveil what they are and what is the difference between the both:

What do T and Y steel bars mean?

Referred to as Reinforcement Bar or Rebar among TMT bar manufacturers in Kolkata, T stands for tensile strength, and Y stands for yield strength. Both of these are essential because they impact steel production and its usage.

What is tensile strength?

Tensile is the potential of being pulled out or stretched. Steel bars’ tensile strength is their resistance power to break under tensile tension. It is the point when the steel structure undergoes deformation- elastic to plastic, i.e. temporary to a permanent shape. Best quality TMT bar manufacturers in Kolkata measure tensile strength in force units per cross-sectional area. It splits apart when the steel is drawn beyond its tensile stress point. The tensile strength of TMT steel bars shows how much tensile stress the steel can resist until it fails in two ways: ductile or brittle failure.

  • Ductility failure– This is considered ad the initial stage of failure, where the steel bars are pushed beyond the yield point so that there is a deformation of a permanent type.
  • Brittle failure– This is the final stage where the measurement of tensile strength of steel bars is noted.

What is yield strength?

The maximum stress applied before the steel bars start to convert their shape permanently is known as the yield strength of the steel bars. It is an approximation of the elastic limit of the steel. If the steel does not reach the yield point even after adding stress to it, the bars will return to their original shape as soon as the stress is removed. On the other hand, when the stress exceeds the yield point, the steel bars cannot regain their original shape. Yield strength is the upper limit of the load that is safely applied to the steel or any other metal; hence it becomes a vital number to be known when the components are designed.

Difference between yield strength and tensile strength

The primary difference between tensile and yield strength of steel bars is that the tensile strength is ruinous, whereas yield strength is only a permanent deformation.

The value of Ratio Tensile/Yield Strength can be obtained by using the below formula:

Ratio= Tensile Strength /Yield Strength

Concast Maxx: The first choice of construction experts

When it comes to the premium quality, robust, and cost-effective TMT Steel Bars, Concast Maxx stands out as one of the top TMT bar companies in West Bengal. We offer the genuine, supreme, and strongest quality of TMT steel bars, which makes it the preferred choice of the construction industry for its various projects from houses, high-rise buildings, bridges, flyovers, and roads.