Different Rolled Steel Bars and Sections
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Thermo-mechanically treated bars or TMT bars are<br />
manufactured by a special technique in which the red-hot<br />
steel bars are suddenly quenched by spraying water on it.<br />
So, surface of bar gets cooled down <strong>and</strong> inner side or core<br />
of the bar still in hot condition.<br />
The core helps the outer surface to be tempered. By this<br />
combination of different temperature, the bar gains more<br />
yield strength <strong>and</strong> exhibits good elongation at ultimate<br />
failure.<br />
Copper, phosphorous <strong>and</strong> chromium etc. are added in<br />
manufacturing process of TMT bars which improves its<br />
corrosion resistance.
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