What is the difference between TMT, HYSD, TOR steel?

Answer 1

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.

Answer 2

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From others answer you know full form of TMT. TMT is a method of manufacturing.Quality of TMT also depend upon its chemical composition.Tor steel may be made from ordinary mild steel or made from high yield strength steel.Therefore chemical composition is a vital information in tor steel too. Physically TMT has non-continuous corrugation were as tor steel is cold twisted therefore it is continuous corrugation. TMT bars & HYSD (high yield strength deformed) bars are not lapped together.This is because both steel does not has similar corrugation hence transfer of stress per unit length is not same therefore such lapping should be avoided.It is imp. to tell that corrugation pitch is fixed by BIS code for tor steel.

Answer 3

hi dude, TMT means Thermo Mechanically Treated which is the one of the type of steel rods, and TOR is the main type of the steel,but TMT is under below the TOR type.TMT is the best for all type off constructions

Answer 4

Twisted Steel Bar

Answer 5

Tor steel is HYSD. ie High Yield Strength Deformed bar.
As the name implies it has comparively high strength than Mild Steel.

They are graded as Fe415, Fe500 ie fy of 415 and 500 N/sqmm respectively.

the HYSD bars may be hot / cold worked.

TMT bar means thermo mechanically treated bar ie hot rolled steel wire is passed throgh cold water to make their suface harder as well as to keep the core softer. It serves two purposes corrosion resistance and weldability.

Answer 6

TMT fe415 and TOR 50 which steel is more effective and strong

Answer 7

You raise some good points here.

Answer 8

Never thought about that too much

Answer 9

as above