What are Thermo-Mechanically Treated TMT bars?

TMT Bars, Thermo mechanically treated bars are high strength deformed steel bars used in reinforced cement concrete (RCC) work manufactured with the latest QST technology. TMT bars have superior properties such as superior strength, higher ductility, better weldability and bendability. Thermo mechanically treated (TMT) steel, can be described as a new-generation-high-strength steel having superior properties which meet the highest international quality standards.

What is thermo mechanically treatment process?

By adopting thermo mechanically treatment process higher strength of TMT bars is obtained. In this process, steel bars get intensive cooling immediately after rolling. When the temperature is suddenly reduced to make surface layer hard, the internal core is hot at the same time. Due to further cooling in atmosphere and heat from the core, the tempering takes place.

When the bars are taken out of the cooling system, the heat flows from the core to the outer surface, further tempering of the bars, which helps them attain higher yield strength. The resulting heat-treated structure imparts superior strength and toughness to the bars. The microstructure of the core is a very fine-grained ferrite and pearlite. TMT bars are also known as ‘Quenched and tempered rebars’, because of the quenching and tempering processes involved in making the bars.

The production of quality TMT bar depends on three major factors – quality raw materials, a properly designed and automated mill, and a well-designed quenching and tempering technology.

This process is expected to improve properties such as yield strength, ductility and toughness of TMT bars. With above properties, TMT steel is highly economical and safe for use. TMT steel bars are more corrosion resistant than Tor steel. All rebars must be purchased based on the properties of yield strength, tensile strength and elongation values.

What are “Friends 500” bars?

Friends Steel has developed rebars, ‘Friends 500’, with High Yield Strength with High Elongation Value.

This Steel is superior to Fe415 because of the excellent strength-ductility combination it offers. Simultaneously it fully confirms to statutory requirements. “Friends 500” Bars have the potential to be used in New High Rises and give better protection against Earthquakes and savings in terms of Steel Consumption.

As a mark of our commitment to quality we have discontinued the production of Fe 415 grade bars in Dia 8,10, 12, 16, 20 & 25. Only “Friends 500” bars are manufactured in these sizes.

Features of “Friends 500” Bars

  • Better ductility and malleability
  • High yield strength and toughness
  • More bonding strength
  • Earthquake resistance
  • High thermal resistance/Fire Resistance
  • Economical and safe in use
  • Good Weld-ability & Formability /No loss in strength at welded joints/Ordinary electrodes used for welding the joints
  • Superior Bend Properties
  • Better Elongation
  • Excellent Corrosion Resistance
  • High Fatigue Resistance

Friends rebars also come in Grades Fe 500D etc. that have uniform and concentrated hardened periphery and the softer core will have the desired tensile strengths coupled with high elongation as required in seismic zones. Friends 500 bars with hardened periphery of about 25 to 30 % of the cross sectional area of the bar is ideal for civil constructions (constructions of houses, offices, etc.)

Savings in weight and cost of construction due to use of Friends 500 Bars:

Characteristics Ordinary TMT Fe 415 Friends 500 rebars
A Design Strength 415N/mm2 500N/mm2
B Quantity Required 1.000 MT 0.830 MT
C Savings in Weight 170 Kg.
D Rate of Rebars per MT 39000 40000
E Effective Cost (B)x(E) 39000 33200
F Cost Savings compared to ordinary TMT Fe 415 5800 or 14.8 %


Illustration: How is Friends 500 Beneficial to Structure Life?

20% Extra life/ Extra Strength to structures.

Characteristics Ordinary TMT Fe 415 Friends 500 rebars
Design Strength 415N/mm2 500N/mm2
Quantity Used 1.000 MT 1.000 MT
Assumed Life of Structure 25 Years 30 Years
Increase in Life 5 years OR 20%
Rate of Rebars per MT 39000 40000
Rate difference in % 2.5%
By using Friends 500 rebars, in same quantity as Ordinary bars, people looking at Building Long Lasting Structures can provide upto 20% more life/strength to structures.


Click here to download Friends TMT bars brochure

Manufacturing Locations

FRIENDS ISI TMT BARS are produced at:

1) Aashiana Rolling Mills Limited, Ahmedabad, Gujarat

Availability of Friends TMT bars

Our TMT Bars Come under the International Brand Name of “FRIENDS” which we supply to a Strict “Registered Dealers” only policy.

Our network has over 400 TMT Dealers spread all across Gujarat and over 125 dealers spread across MP, Chattisgarh, Maharastra and Rajasthan. The entire network of Friends TMT dealers is being managed by our Marketing Personnel and Highly capable distributors.


Our Gujarat network is broadly classified into following territories:

=> Northern Gujarat  – (Mehsana/Sabarkantha/Banaskantha/Patan/Aravalli)

Authorised Distributor: Mr. Milan Patel – Ganesh Steel Traders, Malgodown, Mehsana (M) – 9909014262

Company Officer: 9979667000


=> Central-West Gujarat – (Baroda/Anand/ Chhota Udaipur)

Authorised Distributor: Mr. Pranay Shah – Pranay Ispat, Lokhand Bazaar, Bhavnagar (M)-9879565454

Company Officer: 9979663000/9979668000 (Baroda/ Chhota Udaipur)

Company Officer: 9979668000 (Anand)

=> Gandhinagar

Authorised Distributor: Mr. Rishabh Khandelwal – Rishabh Steel, Vepari Jin, Kalol, Dist. Gandhinagar (M) 9825029982

Company Officer: 9979607000

=> Kheda

Authorised Distributor: Mr. Vishal Parikh – Shreenathji Marketing, Kapadwanj, Dist. Kheda (M) 9825321655

Company Officer: 9979603000

=> Rajkot/Jamnagar/Bhavnagar/Surendranagar

Authorised Distributor: Mr Piyush Shah- Piyush Steel Lokhand Bazaar, Bhavnagar (M) 9825224574

Company Officer: 9979601000

=> Ahmedabad

Company Officer: 9979662000/9979661000


Company Officer: 9979668000/9979663000

=> Surat/Valsad/Tapi/Dang/Navsari

Company Officer: 9979602000/9723329379

=> Junagadh/ Porbandar/ Amreli/ Gir Somnath/Devbhoomi Dwarka

Company Officer: 9724507616/9979608000

=> Central-East Gujarat – (Panchmahal/Dahod/Mahisagar)

Company Officer: 9979607000


Company Officer: 9979601000

We have also established ourselves as number one supplier to SEZs and other major projects all across Gujarat.


Mobile: 9099505000/9979664000 /

=>New Dealership Enquiries: Contact: 9979664000, 9979662000, 9979663000

Chattisgarh/ Madhya Pradesh

=>Eastern Madhya Pradesh And Chhattisgarh

Authorised Distributor: UNITED STEEL TRADERS

Shop no, 49, 2nd Floor,

Radha Mohan Tower

Bhaisthan road, Raipur (C.G.)

PH NO 0771-6461448, 2255414

FAX NO. 2253414

Contact Person- Mr. Prashant Kedia (+91-9575899999) & Mr. Manish Sanghi (+91-9826142414).

=> South Madhya Pradesh

Authorised Distributor: SHREEJI STEELS

Shop No. 13,

Block 4A,Pagariya complex,

New Bus Stand, Pandari,



Contact Person: Mr. Surendra Agrawal (+91-9977748755) & Mr.Prince Khare (+91-8435362126)

Company Officer: Mr Suraj Mobile No 8517862000





TELE NO-0712-2690069, 2690769


Tamil Nadu


Authorised Distributor: LOIWAL STEEL HOUSE

#9/2, Sembudaas Street,

CHENNAI – 600 001



Authorised Distributor: VISHNU ENTERPRISES

55/2,Sembudoss Street,

CHENNAI – 600 001

Phone: + 91-44-25228303 / 25248525

CONTACT PERSON – MR. Rajesh Mittal, MOBILE NO-+91 9710950000; +91 944436063, EMAIL –



Authorised Distributor: JIWRAJKA ENTERPRISES

FF-1, 1st Floor, Banashankari Homes,

132, 1st Cross R.K. Gardens,

RMV 2nd Stage,

New BEL Road,

Bangalore – 560 054

Phone: 080 23605252/ 5353


CONTACT PERSON – MR. Sandip R. Agarwal, MOBILE NO-94483 95353


Company Officer: Mr. Sumit Agrawal Mobile No. 9950205899