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icon Deformed Bar:
A. 40 Grade ( 300 w) TMT Bar
B. 60 Grade ( 400 w) TMT Bar
C. 75 Grade ( 500 w) TMT Bar
ASBRM TMT 500W (Technology) ASBRM TMT 500W, the new generation high strength reinforcement bar. It is different from traditional bars in its method of manufacture and consequently in its combination of properties.
ASBRM TMT 500W is produced using the world's most advanced technology the "Tempcore Process" Belgium inventors of the process of tempcore bars are being successfully used in most parts of the developer world.
The Tempcore Process imparts high strength to the bar using the latest technique of thermo mechanical treatment (TMT) as against cold twisting, which is used to manufacture traditional reinforcing bars.

Steel billets are heated in a reheating furnace and rolled through a sequence of rolling stands which progressively reduce the billet to the final size and shape of the reinforcing bar. The Tempcore Process takes over and the bar is subjected to heat treatment in three successive stages. The first stage of 'Quenching' begins when the hot rolled bar leaves the final mill stand and is rapidly quenched by a special water spray system. This converts the surface layer of the bar to a hardened structure called 'Martensite' while the core remains austenitic. The second stage of 'Self Tempering' begins when the bar leaves the quenching box with a temperature gradient through its cross section, the temperature of the core being higher than that of the surface.

This allows heat to flow from the core to the surface, resulting in tempering of the surface, giving a structure called 'Tempered Martensite' which is strong and tough. The core is still austenitic at this stage.

The third stage of 'Atmospheric Cooling' takes place on the cooling bed, where the austenitic core is transformed to a ductile ferrite-pearlite core. Thus, the final structure consists of a combination of strong outer layer of tempered martensite and a ductile core of ferrite-pearlite. This is what gives ASBRM TMT 500W its unique combination of strength and ductility.

Specifications/Properties of Supreme TMT 500W compliant with requirements of BNBC Code:

Yield Strength (YS)                         : 500 MPa(Min)- 72,500 psi
Ultimate tensile Strength (UTS)     : 575 MPa(Min)- 83,375 psi
Elongation                                     : 14% (Min)

 

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