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What is difference between HYSD bars and TMT bars compare chemical composition also?
Thermo Mechanically Treated (TMT) bars have revolutionised the industry with its superior quality as against the cold twisting process to manufacture the traditional reinforcement bars. The special heat treatment process ensures greater strength, excellent ductility, enhanced bendability and much superior weldability.
CHEMICAL PROPERTIES :
Grade C%Max* S%Max P%Max Mn%Min Si%Max
Fe-415 0.30 .055 .055 .55 .35
The most commonly used steel bar for concrete reinforcement is TOR steel. The other names of TOR steel are CTD bar, deformed steel bar, twisted steel bar, HSD bar, CWD bar etc. These TOR steel bars can be used for general concrete reinforcement in buildings, roads, bridges etc. These steel bars process a combination of strength and ductility that is far in excess of minimum limits specified in standard IS:1786.
::TOR steel bars are certified to IS:1786 in dimensional tolerances. However in the size range of 8/12 mm where tolerance are of great concern, much closer tolerance that the specification is maintained.
HYSD High Yield Strength Deformed (steel) .It is reinfrocement steel.
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