TMT Steel Bars

What is TMT ?

TMT(Thermo Mechanical Treatment) is a metallurgical process which hardens and a heat - treated in a single process. The outcome is a high strength steel bar from a low carbon steel.

The process is all about making a high strength steel bar from a low carbon steel. Steel billets 125 mm  are heated to approximately 1100 degree C in a reheat surface. These bars are later rolled out to reduce the billets  until it reaches the final size and shape of reinforcing bar. The heat process quenches  the surface layer of the steel bar and pressurizes the crystal structure of other layers in the bar. It gives more hardness and strength to the steel bars. These steel bars are often called TMT steel bars. TMT steel bars also called TMT Saria.

Why TMT  Steel bar is required ?

Concrete is generally a very strong in compression, but it is very weak in tension. This imbalance in concrete is tackled by inserting the steel bars along with concrete to carry the designloads.Steelbars workas a secondary reinforcement  by providing durability. It works as resistance to limit cracking, environmental changes and shrinkages.

Rebars are used to hold other steel bars in proper position to accommodate the loads.  So, TMT steel bars are highly used in concrete to give more strength and durability to the structures. TMT steel bars are used mainly for the RCC construction structures. It gives excellent corrosion resistant and high elongation.They assure a good quality with high yield strength,high tensile strength and good ribs for concrete bonding.These advantages is these steel bars need not be given cold twisting. It contains maximum chemical properties required according to the IS standards.

What are the different types of TMT Steel Bars?

TMT steel bars are available in three major grades Fe 500, Fe 500 D and  Fe 600. ‘500’ denotes the strength of the rebar andthe minimum yield stress in N/mm2 .‘D’ refers to ductility of the rebar.

What are the different sizes of TMT Steel Bars or TMT Saria?

TMT  steel bar sizes  are classified based on their steel rod diameter, so the sizes available are 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm. Out of which 6mm & 32mm are Make to order or Customized orders based on the requirement of the customer demands. Single bars of size 20 feet or 12m are available.

Here is a basic calculating guide for your reference:

TMT Size (In bundle)	TMT Weight per bundle	TMT Rods per bundle
8mm	48 kg	10
10mm	48 kg	7
12mm	50 kg	5
16mm	53 kg	3
20mm	57 kg	2
25mm	44 kg	1
32mm	73 kg	1