TECH DATA
TMT BARS
ADVANTAGES OF TMT (Thermo Mechanical Treated) BARS

TMT Bars are treated in 3 stages :
  • Quenching
  • Self Tempering
  • Atmospheric Cooling

    • As there is no twisting during TMT no torsional stress occurs, and so torsional stress cannot form surface defects in TMT bars. Therefore TMT bars have better corrosion resistance. Additionally, the tensile strength of TMT bars is higher due to Martensite micro structures.
    Better Structural Safety : Higher Strength combined with higher Ductility.
    Ease of Working : Better Ductility and Bendability. This reduces construction and fabrication time.
    Fire Resistant : High thermal stability. They are the preferred choice when elevated temperatures of 400-6000 C may be encountered.
    Corrosion Resistant : Controlled water-cooling prevents the formation of coarse carbides, which has been cited as the main cause for the corrosive nature of common bars. Absence of surface stresses caused by the cold twisting process.
    Formability : Due to very high elongation values and consistent properties through out the length of bar, TMT rebars have excellent workability and bendability.
    Earthquake Resistant : The soft ferrite-pearlite core enables the bar to bear dynamic and seismic loading. TMT bars have high fatigue resistance to Dynamic/ Seismic loads due to its higher ductility quality. This makes them most suitable for use in earthquake prone areas.
    Malleability : Most preferred because of their flexible nature.
    Fine Welding Features : TMT rebars (having low carbon content) can be used for butt and other weld joints without reduction in strength at the weld joints.
    Bonding Strength : External ribs running across the entire length of the TMT bar give superior bonding strength between the bar and the concrete.
    Cost Effective : A high tensile strength and better elongation value offers great savings, and reduced transportation costs.


    MILD STEEL

  • One of the cheapest types of steel available. Hence useful for most projects requiring huge amounts of steel.
  • Contains less than 2 percent carbon, which makes it magnetize well.
  • It is a soft material, and hence easy to weld, whereas high-carbon steels, such as stainless steel, require the use of specialized welding techniques.
  • Electricity can flow through mild steel easily without impacting its structural integrity.
  • It is a variant of hard steels, which makes it much less brittle and enhances its flexibility.

    • PRECAUTIONS IN USING MILD STEEL

  • Does not have great structural strength, making it unsuitable for building girders or structural beams.
  • Since it has a weak resistance to corrosion, mild steel must be painted or sealed to keep it from rusting.
  • Putting a coat of grease or oil on mild steel also helps to protect it from corrosion.