Steel TMT bars buying guide

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How to select right Steel TMT bars for your home?

• A steel TMT buying guide

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Planning to buy TMT Steel Bars?Go through our
Steel buying guide and make an informed decision

• Overview
• Usage
• Types, Grades Sizes
• DIY Quality Quantity Checks
• Properties
• Dos and Donts for Storage

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overview

• TMT Steel bars are also known as TMT bars, 'TMT
  Saria' Steel Rods or Rebars (Reinforcement Bars).
• They are the most important component of RCC
  (Reinforced Cement Concrete) structure.
• The word TMT stands for Thermo Mechanically
  Treated Steel. The two major variants are Primary
  Steel and Secondary steel which are available in
  various grades and sizes.

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Why to use TMT Bars

• TMT Steel rebars increase the tensile strength of
  concrete. 
• They have lesser impurities and hence have more
  uniform strength.
• Steel concrete have similar temperature
  coefficients, making them expand / contract
  together and help in bonding. 
• Lower grades of rebars are twisted at cold
  temperature to increase their strength. Whereas,
  there is no twisting during TMT so torsional
  stress cannot form surface defects in TMT bars.
  Hence, TMT bars resist corrosion better than
  cold, twisted and deformed (CTD) bars.

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Type of Material

• The first step in choosing TMT bars is to select
  the type of steel material. The two materials
  available in market are Primary
  Steel and Secondary Steel.
• Primary steel is the virgin steel extracted from
  iron ore whereas secondary steel is the recycled
  steel sourced from steel scrap.
• Choose the material according to construction
  requirement and your budget.

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Grades of TMT Steel Bar

• Once you are done with material selection, choose
  the grade of TMT bar. The grade represents the
  amount of stress a bar can take and is measured
  in N/mm2.
• Higher the grade better is its stress taking
  capacity.
• The four grades of TMT Steel bars are
• The most common type of grade used in
  construction is Fe 500, which means that it can
  take stress upto 500N/mm2.
• The higher grades of bars such as Fe 600 are not
  generally available and are made on order.

Grade Fe 415 Fe 500 Fe 550 Fe 600
Stress Capacity 415 N/mm2 500 N/mm2 550 N/mm2 600 N/mm2
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Variants of TMT Steel Bar

• The two variants of TMT Bars are Ductile (D) and
  Super Ductile (SD).
• So a TMT bar of grade Fe 500 will have two other
  variants as Fe 500 D and Fe 500 SD. 
• These variants are used only in heavy
  constructions or earthquake prone areas.

TMT GRADE VARIANT - D VARIANT - SD
Fe 415 Fe 415 D  
Fe 500 Fe 500 D Fe 500 SD
Fe 550 Fe 550 D  
Fe 600
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Sizes of TMT Steel Bars

• 8mm, 10mm, 12mm and 16mm are the most commonly
  used sizes in RCC. The bigger diameters are used
  in high-rise buildings only.
• The standard length of TMT bars is 12 meters, but
  you can select the length as per requirement.

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Check the Quality Quantity Yourself
Check for identification mark on the bars from
the manufacturing firm.
Check for Standardization Grading marks. Steel
bars follow IS1786 standards
The bars must not be too rusty. Although, a small
amount of rust is acceptable.
Count the number of bundles and bars in each
bundle.
Check the diameter of the rebars.
Ask for the weighbridge receipt from the delivery
man to check for correct weight.
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Properties
High yield strength and toughness
Better ductility and malleability
Earthquake resistant
More bonding strength
High thermal resistance
Corrosion resistant
Decreased level of Sulphur Phosphorus, ensuring
less impurities
Economical safe in use
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Dos and Don'ts for Steel Bars storage
The stacking height must be optimized for
different diameters of bars.
No contact with Water Moisture or else lumps
will be formed and strength will be lost.
Steel bars should be stored in a way to avoid
distortion and to prevent deterioration and
corrosion.
Steel bars should not be cleaned by oily
substance to remove the rust.
More stacking height reduces the tensile strength
bond strength of bars present in lower layers.
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Calculate Construction Cost
Accurately forecasting the building cost is one
of the biggest challenges faced in home building
journey.
Calculate your construction cost in simple steps
by using
BEZTIMATE
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Get Best Quality Steel tmt bars at Best Prices!
Visit us at www.buildzar.com
Call us at 91-9555-913-913