Captain RustGuard

A Product of the Future
A Product of the Future
Captain Steel has become a trendsetter in crafting products ahead of its time like the RustGuard TMT bar. It is a Fusion Bonded Epoxy Coated TMT Bar (FBE) manufactured for the first time in Eastern India by Captain Steel Pvt Ltd. We are equipped with a capacity of producing 50,000 MTPA of RustGuard TMT bar.
Captain RustGuard Reinforcement Bar in India
Technological Marvel
Technological Marvel
RustGuard TMT Bar is the latest breakthrough in the world of rebars, with an excellent rib pattern, ensuring a strong grip of concrete in RCC under fusion bonding conditions. A highly researched product from one of the finest TMT manufacturers in India, the RustGuard TMT bar is a technological marvel due to its epoxy coating specially created to provide complete protection against rust and corrosion.
Rust Guard TMT bars

Captain RustGuard

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Captain Steel has become a trendsetter in crafting products ahead of its time like the RustGuard TMT bar. It is a Fusion Bonded Epoxy Coated TMT Bar (FBE) manufactured for the first time in Eastern India by Captain Steel Pvt Ltd. We are equipped with a capacity of producing 50,000 MTPA of RustGuard TMT bar.

CSIL will ensure that the products are delivered within 10-12 days by CSIL authorized trade partner, only at the available pin codes. 

Free home delivery on a minimum purchase of Rs. 30,000 and above of any CSIL product and within 4 km from the assigned dealer outlet. Delivery charges are to be borne by the customer if the delivery location falls outside the limit mentioned.

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High-Quality Manufacturing Process
High-Quality Manufacturing Process
RustGuard TMT bar is manufactured using Fusion Bonded Epoxy Coating Technology, in which a metaloplast membrane is infused with the top molecular layer of the steel body making it chemically neutral to all normal acidic and basic conditions. It acts as an inhibitor to the actions of hard water, seals reaction sites and shuts out microporosity.
Long-Lasting Structures
Long-Lasting Structures
Captain RustGuard TMT bars offer the greatest strength while extending the construction’s lifespan. These fusion-bonded epoxy-coated TMT bars extend the longevity of structures in harsh, corrosive environments, as they are chemically neutral to all normal acidic and basic conditions, thereby rendering them ideal for large construction projects such as buildings, bridges, flyovers, dams, and highways, as well as for Individual House Builders (IHBs). Our epoxy-coated bars also appeal equally to construction projects in the private and government sectors.

Fusion Bonded Epoxy Coated TMT Bars have been the skeleton of strength for buildings and bridges around the world. Internationally it has been recognized as a symbol of longevity.

Why Choose RustGuard
Why Choose RustGuard
  • Made using the cutting-edge Fusion Bonded Epoxy Coating technology.
  • Protects structures against rust and corrosion.
  • Our epoxy-coated bars provide corrosion protection for concrete.
  • Unlike ordinary TMT rebars, there are no cracks or structural damages to the building.
  • These fusion-bonded epoxy-coated TMT bars do not require regular maintenance and upkeep.
  • Considered one of the best TMT bars for providing a strong foundation and a sturdy roof.

Handling Technique & Advantages

Extended Life of construction
Extended Life of construction
As the epoxy coating of Captain RustGuard TMT bar cuts off oxygen and water from the concrete, corrosion is near impossible. This, thereby extends the life of constructions. RustGuard TMT rebars increase the structural lifespan in corrosive situations.
Better Weldability and Stretchability
Better Weldability and Stretchability
High strength and ductility come from the fine-grain multiphase composite structure. The metaloplast membrane leads to better stretchability and toughness of the epoxy-coated TMT bars. Since the mechanical properties of the rebar remain unchanged, the inherent strength of the TMT bar is not compromised. Neither the outer surface, nor the inner surface is ruptured during bending operations and high thermal stability is maintained. This makes Captain RustGuard TMT bars easy to weld.

BIS Specification Vs RustGuard

ParameterBIS 13620:1993RustGuard
Bare Bar PropertiesAs per IS 1786:2008Conforming to IS 1786:2008
Coating Thickness100 to 300 microns175 to 300 microns
Coating Holiday6 Holiday /m (max)5 Holiday /m (max)
Coating Fliexibility120 Degrees Bend using 10D120 Degrees Bend using 8D & 10D complying with BIS Specifications

Comparison between Normal Rebars Vs FBE (Epoxy) Bars

Standard TestingUncoated RebarsFusion Bonded Epoxy Coated Bars
Bureau of Indian StandardsIS 1786:2008IS 13620:1993
Rusting and CorrosionYesNo
Bond with ConcreteExcellentExcellent forever
FlexibilityExcellentExcellent forever
Coating ThicknessN.A.Excellent
Continuity of CoatingN.A.Uniform
Salt Spray TestAfter 45 days material found rusted and reduced in thickness100% rust-free and same thickness after 45 days of processing
Resistance to alkaline environmentSafe for some timeVery safe for a long time
Resistance to acidic environmentSafe for some timeVery safe for a long time
Impact TestN.A.Conforming IS 13620:1993

Don't take our word for it


I have been associated with Captain TMT for 6 years now. The quality of Captain 600EQR and Captain RustGuard is really excellent. Also, the Captain Support staff is really helpful and good. I am thankful to Captain TMT for being with us in our professional sphere.

Ashesh Maity,

Civil Engineer, Digha Area


The quality of CAPTAIN TMT Bars is excellent and these rebars fit all types of reinforcements and designs. I am very much satisfied with the product since 2012 and always refer CAPTAIN TMT to my clients. To say that CAPTAIN offers the best bendability and strength is no exaggeration. As an Architect I personally like CAPTAIN RustGuard very much

Sujan Kumar Mondal

Architect, Howrah


I chose Captain TMT because of easy availability; the product has a wide size range and is readily available at the dealer counter. The price of the product and quality is impressive and I am very happy with the choice of buying Captain TMT.

Anil Tiwary,



I am a first time user of coated TMT bar for construction and honestly I am thoroughly satisfied with Captain RustGuard. It is easily available in my locality and the product gives complete peace of mind.

Anuj Kumar,

Customer, Daltonganj


Captain RustGuard is really a unique and useful product. It is also easily available. We have approximately lifted 35 MT of RustGuard in the last 6 months.

Amrit Kumar Gupta



It has been 6 years now that I have been associated with Captain Steel. Must say they come with very good schemes and definitely look at improving our business with their strategies. I am loyal to the brand and always recommend 600 EQR to all my customers.

Mohammad Mohiddin

PLY CENTRE, Jagarnathpur, Jharkhand


It has been a wonderful association with Captain TMT for the last 7 years. Their support system is really impressive and I have never got stuck without any solution from team Captain. I have been able to grow my business along with Captain TMT.

Sunil Kumar

Prasad Agency, Gumla, Jharkhand


My business association with Captain Steel is nearly for 4 years. All this while, I have benefited from their schemes, offers and their excellent sales and marketing support. The company has helped me in growing my business for the past few years and I recommend the brand to all my customers.

Manoj Kumar Rakshit

Manoj Enterprises, Godda, Jharkhand

Frequently Asked Questions

The Captain Steel TMT Bars have a grade of 600 EQR.

Our QC laboratory is equipped with a spectrometer, universal tensile strength machine and microscope to ensure the production of high-quality TMT bars.

- Superior chemical properties as compared to the relevant required maximum values of carbon and sulphur

- Superior physical properties

- Superior UTS (Ultimate Tensile Stress) / YS (Yield Stress) Ratio

- Superior % Elongation

- Better Nitrogen Values

The TMT bars are sized from 5.5mm to 32mm.

Captain 600 EQR can resist up to 600 degrees Celsius

Yes, weprovide the test report with the consignment of TMT Bars.

Yes, we have our own steel melting shop.

Captain 600 EQR is made from C-20 billets, which enhances the intrinsic quality of the TMT bar which can withstand heavy loads in adverse conditions.

The scientific rib design on the Captain 600 EQR TMT Bars creates a tight grip with the concrete, which is safe in RCC constructions.

Captain 600 EQR can resist upto 600 degrees Celsius.

Due to low carbon content, Captain 600EQR TMT Bars can be butt or lap-welded using ordinary rutile-coated electrodes without pre or post-heat treatment.

RustGuard TMT bar is called a green revolution in steel. Captain Steel was the first to manufacture the RustGuardTMT bar in Eastern India.

It is called Rust Guard as this TMT bar provides complete protection from rust and corrosion due to its epoxy coating.

Epoxy coatings cure, whereas paint dries. In addition, when 100 % solid epoxy coating is used, the surface becomes hard and durable, making it highly resistant to things like chemicals, abrasions, impact, oil and grease, and stains.

No, the green colour is not hand-painted. It is a fusion bonded epoxy coating on the TMT bar, done by high-end machines. Epoxy coating is basically 100% solid ground fused powder particles which when heated melt to form a continuous film - the metaloplast membrane. This membrane, being non-penetrative, protects the TMT bars from the attack of oxygen and water molecules and provides protection from rust and corrosion.

This is because the rib design protruding prominently on Rust Guard TMT bars ensures a strong grip with the concrete, especially in RCC constructions.

Yes. RustGuardTMT bars can be welded. After welding, a patch-up coating must be applied to the cut area. A complimentary patch-up coating is provided by Captain Steel on every purchase.

Yes. RustGuard TMT bars are flexible and can be bent.

Rust Guard TMT bars conform with BIS IS 13620: 1993 specifications.

No, please use a cutting machine or a hacksaw blade to cut Rust Guard rebars.

Please use a mandrel for bending Rust Guard reinforcement bars.

Rust guard TMT bars are manufactured in the following steps:

a. Surface preparation by shot blasting process

b. Heating of rebars (upto 240 degrees Celsius) by induction heating

c. Fusion bonded epoxy coating on rebars

d. Quenching of rebars

e. Testing of the fusion-bonded epoxy-coated TMT bars

We use the German-based Thermex technology for manufacturing TMT rebars.

Yes. Captain 600 EQR is manufactured at a fully automatic continuous rolling mill which results in excellent dimensional tolerance to set the perfect configuration in surface finishing.

General FAQ's

Thermo-Mechanically Treated bars, better known as TMT bars, are high-strength
reinforcement bars that have a tough outer surface and a soft inner core. The strength of
TMT bars is controlled by optimising the water pressure to render a soft core and tough
exterior surface, thereby providing optimum strength, ductility and toughness

TMT reinforcing bar has a soft ferrite-pearlite core and a hard martensitic rim. The outer
layer of the steel bar becomes tough and durable due to the drastic difference in
temperature brought about by the process of sudden quenching. TMT bars are then
subjected to atmospheric cooling to equalise the temperature difference between the inner
core and exterior. As it gradually goes through a cooling process, the TMT bar turns into a
ferrite-pearlite mass. The TMT bar has good tensile strength and ductility since the inner
core remains soft.

TMT bars are widely used in general purpose concrete reinforcement structures, bridges and
flyovers, dams, thermal and hydel power plants, industrial structures, high-rise buildings,
underground platforms in metro railway and rapid transport system.

The manufacturing process of TMT Bar involves the following steps
Step 1- Manufacturing of billets from raw materials:
Step 2 - Heating, Rolling and formation of reinforced bar:
Step 3 - Quenching:
Step 4 - Self-tempering:
Step 5 - Atmospheric Cooling:

Manufacture of Steel Billets

Billets are rectangular rods which are created by the Continuous Casting Process. In this process,
steel is molten and heated to a temperature of 1700°C. It is subsequently poured into casting
moulds to give the form of billets.

The hot billets are sent to a Rolling / Reduction Mill where the thickness is further reduced and
elongated across three stands – Roughing, Intermediate and the Finishing stands. 


Undesirable property changes might occur in case freshly cast rods are consistently kept at a
higher temperature.
However, this is prevented by passing the bars through a Quenching Chamber where they
undergo Rapid Cooling system and are sprayed with cold water.
This leads to a unique layer called Martensite being formed on the exterior surface of the bar.

Self Tempering

During the cooling down process of the steel bars, the outer core of the bar is at a lower
temperature and the inner core is at a much higher temperature.
The Martensite is further tempered on exposure to air and conduction, which leads to heat flix
being transferred to the outer core from the inner core.
Eventually, the process leads to the formation of Bainite and Martensite rings around the bars.
This helps the bar to achieve higher yield strength. The core remains hot and malleable,
otherwise called austenitic during this phase.

Atmospheric Cooling

The temperature of the inner core of the bars are gradually reduced to room temperature by
passing them through special cooling beds. At this point the differentiation of outer and inner
core becomes cognizable. The bar becomes more weldable and tensile since it has Ferrite- Pearlite structure in the center.
The bars are then tested, bundled, and made ready for despatch.

Earthquake resistant
Enhanced strength combined with high ductility
High thermal resistance
Better malleability
Can be easily welded without loss of strength at places of welding

Quality of material being used
Equipment and machinery involved in the self-tempering and quenching process. Rolling mill which gives shape to the material.

- Better bending strength, better ductility, better malleability, better thermal resistance, and better
corrosion resistance.
- It saves time in the Reinforcement process
- Reduces the cost of the labour
- Lesser weight, hence, a reduction in transportation cost
- Easy processing since easily bendable without losing strength

- Ease of bending, rebending and reverse bending
- Can be Butt-welded/ Lap welded
- High corrosion resistance.
- No significant changes in strength due to aging.
- Weldability and excellent ductility
- Easy bendability factor
- Ideally suitable for a concrete structure.
- No huge change in quality at high temperatures. 
- The use of high tmt grade rebars ensures around 15-17% savings in steel.
- Low carbon content.
- Percentage of elongation and tensile strength is high, high yield stress, the rate of prolongation is high
- Greater ductility for usage in seismic zones
- Greater resistance to higher temperatures
- Better bendability and greater weldability
- Better corrosion resistance property

Fe-415, Fe-500, Fe-550, and Fe-600 are four different grades of TMT bars produced in
These grade numbers signify the stress level that must be applied to make any
deformation in the bar. More stronger and superior bars have higher grade. According to
their strength and rigidity, the respective grades are given.
Decorative structures like balcony railings etc are made with low graded bars, but for
core building structures like roofs and floors high graded bars are used.
Usually for residential constructions and homes, Fe – 415 is suitable whereas Fe – 600
bars are used for industrial use. For construction of bridges and underground structures,
versatile bars like Fe – 500 and Fe – 550 are preferred.

In 1959, Round bars were used, which led to plain ribbed bars from 1960 onwards. In
1968 came CTD bars (Cold Twisted Deformed) and the next step was TMT bars, which
happened in 1980.

Now, let’s learn a little detail about these different grades of these bars which the TMT bar
manufacturers in India produce –
1. Fe-415 – This grade of TMT bar is perfect choice for homes and residential
construction. They feature higher elongation which makes them absolutely perfect for
building structures in earthquake-prone areas. Due to their anti-corrosion resistant
coating, these grades of bars protect from rust and corrosion
2. Fe-500 – This grade of TMT bar is popularly known for its uses during the
construction of bridges, underground structures and multi-story commercial buildings.
3. Widely used in coastal areas since they are resistant to corrosion
4. Fe-550 – They are slightly better than Fe-500 grade and they are used both for
construction activities which Fe-500 is capable of and also for those projects for which Fe
– 500 is a little unsuitable
5. Fe-600 – This type of TMT grade is generally used for heavy industrial construction
as they require extraordinary strength and hardiness. This grade feature higher tensile
strength than any of the other grades

When iron is oxidised by open air, a layer of oxide is formed which is known as rusting.
Although rusting has no impact on the quality of product, it is quite common since reaction
of air and moisture forming rust is a regular phenomenon. It spreads on the surface
uniformly. Corrosion is a chemical or an electrochemical reaction between an engineered
material and its environment which causes its disintegration. Other compounds are also
formed along with oxides and this leads to the metal surface being unevenly eroded. This is
detrimental to the product quality.

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