isteel TMT Making process Video

iSTEEL www.youtube.com

Brief Summary

This video showcases the manufacturing process and quality control measures of iSTEEL TMT construction bars, emphasizing their durability, strength, and cost-effectiveness. It highlights the use of advanced technology in production, rigorous testing procedures, and customer-centric services like pre-cut bars and stirrups.

  • iSTEEL uses high-quality raw materials and state-of-the-art manufacturing processes to produce durable TMT bars.
  • The company emphasizes rigorous testing and quality control, including chemical composition analysis, strength tests, and bend/rebend tests.
  • iSTEEL offers customer-centric services such as pre-cut bars and stirrups to reduce waste and save construction costs.

Introduction to iSTEEL

iSTEEL aims to be a partner in creating durable, maintenance-free homes. The company has quickly gained a reputation for superior quality and uniqueness. With over 20 years in the steel manufacturing and marketing industry, iSTEEL operates a fully integrated facility with a state-of-the-art metallurgical laboratory. The company is ISO 9001:2000 certified and exceeds ISI specifications in product quality. Their TMT bar manufacturing facility is inspected and certified by L&T for quality and supply capabilities.

Manufacturing Process: From Raw Materials to Billets

The TMT construction bars are manufactured using a computer-controlled water quenching process. High-quality raw materials are charged into a 25-ton steel-making furnace, and the liquid metal is regularly tested to ensure it meets ISI specifications. The chemical composition is crucial for achieving the desired properties in various steel grades like Fe 415, Fe 500, Fe 550, and CRS (corrosion-resistant steel). Carbon provides strength, while manganese offers flexibility. Once the liquid steel reaches 1,660 degrees Celsius, it is poured into a ladle and purged with inert gas to homogenize the temperature and remove dissolved gases. The steel is then cast into prime quality steel billets using a continuous casting machine, which ensures a superior grain structure free of internal defects.

Rolling Mill and Water Quenching Process

The billets are cut and passed through a computer-controlled reheating furnace to ensure an even temperature, resulting in a better-quality finished product with uniform weight per meter. The billets then enter the rolling mill, where the bar size is reduced to the desired diameter, ranging from 8 to 32 mm. A critical step is water quenching and tempering, where the finished bars are heat-treated to achieve the desired properties. Pinch rolls guide the bars into the quenching chamber, ensuring consistent properties across the bar.

Tempering and Cooling

The red-hot rod is rapidly cooled by spraying water, changing the outer layer temperature from 900°C to 280°C while the inner layer remains at 900°C. This process tempers the outer layer on the cooling bed, resulting in an equalization temperature of 575°C to 625°C, depending on the steel grade (Fe 415, Fe 500, or Fe 550). This forms a hard outer layer of tempered martensite and a soft inner layer of ferrite-pearlite, providing both strength and flexibility. iSTEEL uses a computer-controlled quenching system to vary the amount of water sprayed based on the bar's temperature, ensuring uniform strength along its length.

Rib Cutting and Quality Testing

A computer-controlled flying shear cuts the bar, preventing sharp edges. The tail breaker slows the bar's speed onto the cooling bed, guided by a PLC-controlled twin-channel arrangement. iSTEEL bars have a unique surface due to the CNC-controlled rib cutting machine, which creates superior rib geometry for better bond strength. Every steel batch undergoes rigorous testing, including spectrometer analysis for chemical composition and universal testing machine (UTM) tests for bar strength.

Field Tests and Quality Assurance

Simple tests can be performed to verify the quality of iSTEEL bars. The acid test reveals a "Ring of Confidence," indicating the bar was made through the TMT process. The bend and rebend test checks for strength and flexibility by bending the bar to 135 degrees, boiling it in water, and then rebending it to 157.5 degrees without surface cracks. Weighing the bar ensures it meets ISI standards, with weight per meter cards provided to dealers for verification.

Additional Services and Customer Focus

iSTEEL does not stock TMT bars for long periods, ensuring "Factory Fresh steel" reaches customers. To reduce steel wastage at construction sites, iSTEEL offers pre-cut bars and pre-fabricated stirrups in standard sizes. A mobile laboratory is available to guide customers on steel testing at their sites at no cost. With an extensive dealer network, iSTEEL TMT construction bars are readily accessible. The company's innovative approach has earned the trust of clients like L&T, IVRCL, and Tata Consultant Services. iSTEEL is committed to enhancing the quality of life by providing strong and flexible steel for lasting homes.

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Transcript

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0:00 [Music] [Applause] he [Music] homes are built once in a lifetime and handed down over Generations a home is forever building a home is about giving

0:46 Wings to your dreams and we hope to partner in helping you create a robust durable home that is free from repair and maintenance it is our pleasure to share with you the role of ice steel CMT construction bars in Building long-lasting Homes within few years I steel has become a reputed brand in the market as customers have appreciated its superior quality and the uniqueness of the I steel brand and product I steel comes from a company that has been in the steel manufacturing and marketing industry for more than 20 years the ice steel factory is a fully integrated facility fitted with a state-of-the-art metallurgical laboratory that is run by seasoned professionals we are an ISO 90012000 company certified by dnv

1:33 Netherlands our products offer consistent quality having physical and chemical parameters well ahead of the isi specifications we have the distinction of having our TMT bars manufacturing facility inspected and certified by L&T quality assurance and control department for quality and Supply capabilities take a minute to consider which TMT construction bar to buy welcome to a journey into how our TMT construction bars are made and take a look at our unique products and services at our plant TMT construction bars are manufactured using the latest computer controlled water quenching process here is how it all happens carefully selected highquality raw

2:20 materials are charged into a 25 ton steel making furnace during steel making at regular intervals the liquid metal is tested to ensure that the chemical composition is as per isi specifications the chemical composition must be right to get the right properties and various grades of Steel such as Fe 415 fe500 F550 and CRS that's corrosion resistant steel carbon gives strength and manganese provides flexibility when the liquid steel attains 1,660 de Centigrade it is poured into a huge to a fractory lined metal container called The [Applause]

3:22 Ladle the liquid steel is then purged with an inert gas to homogenize the temperature and to release any dissol gases in the metal the ladle is then lifted and placed on a continuous casting machine where the liquid steel is cast into Prime Quality Steel billets very few producers use billets to make TMT grade steel billets are the most modern method of casting liquid steel into Rolling Stock which helps produce steel of Superior grain structure free of internal defects and homogeneous in its properties a simple example to explain this steel cast from

4:08 ingots has an inherent defect of piping look carefully and you will see that there is air trapped in the steel which weakens the TMT bars and in comparison take a look at a Billet which is continuously cast and therefore there is no question of air trapped inside it is therefore smart to insist on buying TMT bars that are made from billets the billets are cut and then passed through a computer controlled reheating furnace which ensures that there is an even temperature of Billet Rolling Stock resulting in better quality finished product with uniform weight per

4:56 meter post reheating the billets go into the Rolling Mill where the size of the bar is reduced to the desired [Music] diameter our Rolling Mill is able to provide bars of all diameters from 8 to 32 mm to meet all our customers Construction needs another critical part of the manufacturing process is that of water quenching and tempering where the finished diameter bars are heat treated to give the desired properties to make sure that

5:44 every bar spends the same amount of time in the quenching chamber the bars are guided into it by pinch rolls thereby giving consistency of properties across the bar and straightened bars The Red Hot Rod is sent through a chamber where water is sprayed onto the incoming bar rapidly which suddenly changes the outer layer temperature of the bar from 900° C to 280° C while the inner layer stays at 900° C the inner layer tempers the outer layer on the cooling bed the bar now reaches an equalization temperature of about 575° C to 625 de Centigrade depending on the

6:31 grade of Steel we want to make it could be Fe 415 fe500 or Fe 550 grade this forms the hard outer layer called tempered Martin sight and soft inner layer ferite perlite the outer layer is thus hard and keeps the bar strong while the inner layer being soft provides flexibility and elongation I steel has further improved the process and now has a new water quenching System since different parts of the bar entering the cooling chamber vary in temperature computer controlled quenching ensures that the amount of water sprayed onto the bar varies depending on the temperature of that

7:16 portion of the bar as a result we have a bar of similar strength across the length something that few TMT construction bars can boast of a computer controlled flying Shear cuts the bar off the quenching process ensuring that there are no sharp edges on the bar that reaches you the tail breaker slows the speed of the bar after it has been cut by the flying Shear onto the cooling bed there is a twin Channel Arrangement that is PLC controlled and guides the bar onto the cooling bed look closely at an ice steel bar and it has a surface look that is different from other bars this is due to the CNC

8:03 controlled rib cutting machine that yields perfect rib geometry to give Superior ribs and hence better bond strength every batch of Steel that leaves the ice steel factory is rigorously tested the spectrometer is sophisticated equipment that tells us the chemical composition of the steel bar in terms of 32 elements we ensure that the High SI standards are strictly maintained the bar strength is tested by the universal testing machine also called the UTM the bar is placed between the jaws of the UTM and pressure is applied to it the bar should not break below a certain amount of Force if it does it will not

8:48 be sent to the market these machines are expensive and require a laboratory for testing but there are a few tests that you can carry out easily the acid test is one where the bar is dipped in acid for a period of time if the bar is made through a TMT process you will see the formation of a ring what we call the Ring of confidence in other words the confidence for you to buy the bar that will be part of your longlasting home you can also get your bar Bender to do the bend and rebend test here the bar is first bent to 135° then kept in boiling water for 30 minutes and allowed to cool it is then rebent to

9:33 157.5 De if your bar has the right amount of strength and flexibility the bar should bend easily and there won't be any surface cracks along the bends if a bar fails the bend and rebend test surface cracks will develop even before the concreting is done in this event once the concreting has been completed the bar will start to corrode thereby shortening the life of the structure the final test is for you to weigh the bar and see if it meets the isi standards we have provided our dealers with weight per meter cards please ask for it and check if you are buying the right weight weight per meter ensures that the bar has the same diameter throughout and hence uniform strength

10:21 across these are the tests that are carried out on the TMT bars to ensure that they meet quality standards all this because we believe that building a house is in Child's Play since steel rusts easily we do not stock ready TMT bars for a long time but make them and send them immediately to the market ensuring that you get what we call Factory fresh steel at I steel it is our effort to ensure that you get what you pay for genuine TMT bars at construction sites there is a huge wastage of Steel we recognize this and have two products that help you save cost and time I steel is happy to offer you pre-cut bars to the exact size that

11:07 you need so bars are not wasted and you can avoid the headache of having to get bars cut on site so just buy and install making stirups is also a cumbersome process which is why we offer pre-fabricated stir-ups in all the standard sizes all this to help you save your construction costs with many more products in the pipeline we also have a mobile laboratory that travels to customer sites to guide you on how to test steel and carry out some basic tests on the steel you buy at no cost to you with an extensive dealer Network across tamaru rtmt construction bars are always available close to our customers our Innovative approach in steel marketing has earned us many

11:54 reputed clients such as Lassen and tubro ivrcl Tata consultant services to name a few who have placed their trust in us a home is an investment for our family it must be strong and flexible to stand for years and years so that our children can benefit from the fruits of our labor I steel is not about the past it is committed to changing the future in the quality of life and steel bring home ICE steel because a home is forever

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