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Reinforcement bars are used generally in construction projects.
Basically there are 3 Qualities in bars:-
1) CTD :- Cold Twisted Deformed Bars
2) TOR :- Tor – 40
3) TMT :- Thermo-Mechanically Treated Bars
 

 

 
CTD & TOR-40 :
CTD & TOR -40 are old forms of reinforcement bars but are now obsolete because CTD name itself suggests that it is “cold twisted deformed” bars. And it is twisted when it is cold, which leads to surface crack which makes the product more prone to corrosion. TMT Bars are much easily available and is of superior quality than CTD & TOR-40.
TMT Bars:
Representation of TMT bars is done by its diameter.
For e.g.: 8mm TMT bar means diameter of that bar is 8mm.
Sizes:-
Following are the sizes available in Reinforcement bars:
Diameter (in mm): 8, 10, 12, 16, 18, 20, 25, 28, 32, 40, 45.
Grades of TMT Bars:-

IS
1786-1985

FE- 415 - 415 485 14.5

IS
1786-1985

FE- 500 - 500 545 12

IS
1786-1985

FE- 550 - 550 585 8

Re-Bars with corrosion resistant
element

CRM Cu+Cr+P = 0.75 % min 415 485 14.5
HSCRM Cu+Cr+P = 0.75 % min 500 545 12
Earth Quake resistance EQR       14. 5
Manufacturers of TMT bars:-
There are broadly 2 types of Manufacturers
1) Primary
2) Secondary
Primary Manufacturers :-
Primary Producers are those who have fully integrated plants (i.e. plants which have their own sources of Iron-ore, Blast furnace, Sponge iron plant, Power plant & Finished product plant.)
In India there are mainly 4 Primary producers of TMT Bars which are as follows:-
 SAIL
 VIZAG (also known as RINL : RASHTRIYA ISPAT NIGAM LIMITED)
 TATA
 Jindal
Secondary Manufacturers –

1

Regency Ispat Wada

2

Guardian Wada

3

Metro Ispat Wada

4

Bhuwalka Steel Industries Wada
5 Jay Jyotawali Wada
6 Su Vikas Wada
7 Varun Steel Wada
8 Kalika Jalna
9 Rajuri Jalna
10 Saraswati Steel Jalna
11 Shri Om Jalna
12 Guarav Krishna Raipur
13 G. P Ispat Raipur
14 Goel Raipur
15 Rathi Silvassa
16 Balbir Silvassa
17 Bhagwati Silvassa
18 Pratibha Rolling Mill Khopoli
19 Metro Alloys Murbad
20 T.k Ispat Pune
21 Bhagwati Steel Cast Limited Nasik
 

1

Thane Steel Wada

2

Kamdhenu Wada

3

Gurunanak Wada

4

Kudus Rolling Mill Wada
5 Gurunanak Wada
6 Multi Steel Wada
7 Maa Chintpurni Wada
8 Kudus Rolling Mill Wada
9 Sun Steel Wada
10 Kunal Ispat Wada
11 Jay Mahalaxmi Wada
12 Dhanlaxmi Jalna
13 Shiv Shakti Jalna
14 Rupam Steel Jalna
15 Polaad Steel Jalna
16 K M Re-Rolls Jalna
17 Air Carrying Corporation Murbad
18 Rajrani Steel Casting Pvt. Limited Nasik
19 Nashik Metals Pvt. Ltd. Nasik
20 MITC Nasik
21 Meenakshi Nagpur
22 Hytech Nagpur
23 Shree Shardha Nagpur
 

1

Vaishnav Wada
 
 
     
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