What Is The Meaning Of TMT 500W?

Have you ever seen TMT 500W, TMT 400W, etc in the TMT steel rebars? If you don’t know their meaning, no worry; in this article, we’ll explain the meaning of TMT 500W, 400W etc.

What Is The Meaning Of TMT 500W?

Well, It’s an important question often asked in the interview. There are TMT 500w, TMT 400w, etc steel bars available in the market.

TMT meaning is “Thermo mechanically treated,” which is the process of manufacturing steel bars.

TMT 500W is a type of TMT bar which is highly suitable for all kinds of construction needs.

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The number 500 here indicates the yield strength of the bar. This is measured in pascals and indicates that the yield strength of these bars is 500 pascals.

The ‘W’ indicates that these bars are weldable. To be weldable steel bars need to be more ductile. Higher ductility allows the bars to be easily welded.

We know,

1 Mpa= 145 psi,

So 500 x 145= 72500 psi = 72.5 ksi or 72 Graded rods.

Here, 72500 is the yield strength of the bar. If the yield strength is exceeded the rod will fail in tension which will result in structural failure.

Similarly, you can calculate the yield strength of TMT 400W.

What Is TMT?

In TMT technology, steel bars are passed through a water cooling system where these are kept for such a period that the outer surface of bars becomes cool while the core remains hot. This creates a temperature gradient in the bars.

When the bars are taken out of the cooling system, the heat flows from the core to the outer surface causing further tempering of steel bars, thereby helping them in attaining a higher yield strength.

Read – Difference Between TMT Bars & HYSD Bars.

TMT 500W

So, in this article, we learned TMT meaning, TMT 500W meaning. Please share it with your friends.

Also Read

Things To Check Before Buying TMT Bars

Types Of Rabars Used In Construction

How To Calculate Unit Weight Of Steel Bars

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1 thought on “What Is The Meaning Of TMT 500W?”

  1. Dear Sir,

    MTM is the full form of “Thermo Mechanical Treatment” through which they are produced.

    Er.M.Suresh Babu
    Thanks & Regards


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