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Hot Rolling vs Cold Rolling: Which One Is Better?

 

In the metalworking industry, rolling is a crucial process. The metal stock passes through a pair of heavy rolls in this process. This gives it the desired shape and thickness and imparts desired geometrical dimensions and mechanical properties. The idea is similar to rolling dough with a rolling pin. 

What is Hot Rolling?

Hot Rolling is a process in metalworking during which the metal is rolled above the recrystallisation temperature. The minimum temperature at which metal is recrystallised is 1700 degrees Fahrenheit. The hot rolling process makes the metal more malleable and easier to shape into desired geometrical dimensions and material properties while maintaining the same volume. 

During this process, as the name suggests, a billet of metal is heated and passed between two rolls to flatten and lengthen it. This process helps the metal obtain uniform thickness and reduces the cross-sectional area.  

What are the Advantages of Hot Rolling? 

1. Improvement in Mechanical Properties

When metal is heated and rolled above the high temperature of 1700 degrees Fahrenheit, the metal gains a lot of new properties due to the hot rolling process. Some of the changes include toughness, resistance to shock, ductility, elongation percentage, and more. 

2. Elimination of Porosity and Refined Grain Structure

A significant advantage of the hot rolling process is the removal of defects which include welding pores, coarse grains, and more. During the recrystallisation process, the coarse grain converts into refined grains, causing changes in the properties of the metal. 

The pores are also removed during this time, causing a strong and uniform structure.

3. Uniform Distribution of Impurities  

During the hot rolling process, any impurities that might be present gets removed from the metal, such as slag and others. The removal of such impurities makes the metal more durable. Had there been impurities, it would have made certain sections weaker. 

4. High Production Rate 

When the metal is heated at a high temperature, the raw material’s deformation resistance is lowered, and thermoplasticity increases. This process increases the production rate as the machinery and motor get less worn out due to the malleability of the metal at that given point. 

What are the Disadvantages of Hot Rolling?

1. High Cost of Equipment

The process of hot rolling might increase the production rate but does raise the cost of production, from expensive tools to trained professionals who need years of experience to operate the machinery properly. 

2. Maintaining Accurate Temperature

The majority of the hot rolling process depends on the correct temperature. Maintaining 1,700 Fahrenheit can be a challenging task. If the right temperature is not maintained, it might cause damage to the metal being produced. 

3. Surface Finish And Texture 

The high temperature causes the surface to have a poor finish as the high temperature increases the oxidation and scaling process. 

What is Cold Rolling?

The alternative to hot rolling is known as the process of cold rolling. Metal passes through the roller below the recrystallisation temperature in the cold rolling process. This process increases the strength and durability of the metal. The metal is less malleable because it remains at room temperature than the recrystallisation temperature, but this labour-intensive process reduces the grain size of the metal. 

What are the Advantages of Cold Rolling?

1. Surface Finish 

Due to the absence of high temperatures, the metal coating of the metal is not damaged. It also has a flat and smooth surface with fewer deformations. 

2. Lower Cost 

For cold rolling, there is no requirement for expensive tools and machinery. Since the cold rolling process doesn’t need to maintain a specific temperature, the expertise required is also significantly reduced. 

3. High Yield Point 

Due to the cold rolling process, metal can produce large plastic deformation, which increases the yield of the metal.

4. Close Tolerance Point 

With the cold rolling process, the tolerance point of the metal can go as close as  0.025 mm.

5. Strength 

Since the cold rolling process does not require high temperatures, the metal maintains its structural integrity and doesn’t turn weak. 

What are the Disadvantages of Cold Rolling?

1. High Cost 

The cold rolling process takes longer to produce than the hot-rolling process. The metal is more difficult to manipulate and takes longer to process. That is why the price increases. 

2. No Distribution of Impurities 

When the metal is heated for the hot rolling process, impurities get the chance to distribute evenly. In the cold rolling process, impurities don’t get the opportunity to redistribute. 

3. Grain Size

The reduction size of the grain is necessary to obtain strength and durability. During the hot rolling process, metal receives a refined grain structure, but in the cold rolling process, there is no significant reduction in the size of grain due to the lack of high temperature. 

4. Width 

The cold rolling process provides minimal leeway to correct things post-production. Width is one of the primary examples of it. In the case of rolled metal, you can shave down unnecessary portions easily. You need to begin with the correct measurement for cold-rolled metal, as customising it might be problematic later. 

Which One is Better: Hot Rolling or Cold Rolling?

The question of which process is better is a question that does not have a definite answer. As we discussed, the hot rolling and the cold rolling process both have their advantages and disadvantages. To obtain the answer of which process is better, you need to know what you intend to manufacture in the first place. 

The metal we get during the hot rolling process is necessary for railroads, construction steel bars, beams, and more. Due to its appearance, the hot-rolled metal is used more for structural works. 

On the other hand, cold-rolled metal would be too brittle for railroads. Instead, due to the close tolerance point, the sheets are thinner. This process creates metal sheets appropriate for furniture, household appliances, cabinets, beverage cans and more. 

Why Choose The Steefo Group?

The name of The Steefo Group has become synonymous with premium quality in rolling mill services. With its foundation going back around four decades, we have built our reputation based on our quality. Recognized by the Government of India as the Star Export House and international clientele, we intend to be your reliable partner for all your steel-forming needs. To enquire more about our products and services, contact marketing@thesteefogroup.com or give us a call at +919824076873

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5 Benefits of Rolling Mills for Small Manufacturers

 

Rolling mills come with various constructions and are an integral part of any small industry in India. No matter the size of the rolling mill machinery, their performance remains the same in handling heavy metals. You might wonder what a rolling mill is and how it is profitable for small manufacturers? Read on to learn more so that you can make an informed decision.

What Are Rolling Mills?

Rolling mills are a type of metal forming machinery. They help process various metals through one or more rolls to reduce or create uniform thickness or imprint a design.

All rolling mills have at least one pair of heavy rollers. Depending upon your use and requirement, you can opt for mills with more than one pair of rollers that are also heavier to mould high-density metals. The range of sizes the rolling mills offer makes them profitable for small manufacturers.

How Does a Rolling Mill Work for Manufacturing Units?

Rolling mills can help alter the physical properties of a metal sheet. The purpose of a rolling mill is to provide a uniform thickness and consistency. These rollers are constructed with a strength that can easily squeeze and compress hardened pieces of metal as they are passed through a pair of adjoining rollers. 

No matter the initial shape of the metal, once they are squeezed out of the rollers, they acquire a uniform flattened shape ready to be used in various spheres of small-scale and large-scale manufacturing facilities.

Advantages of Installing Rolling Mill Machinery 

Rolling mills come with many advantages for both large-scale and small-scale manufacturers, catering separately to varied needs.

1. Ideal for Processing Metal

For ages, rolling mills have served as the perfect machinery for processing metals of varying densities. Not only do they save time in beating and flattening the metals into sheets, but they are convenient to small-scale manufacturers who place the utmost importance on efficiency and perfection in their work.

2. Good Consistency

Small manufacturers need the highest accuracy in their products because they produce metal sheets of comparatively smaller sizes and less in numbers than large-scale manufacturers. It is only through rolling mills that such constant uniformity is maintained throughout the long material length.

3. Easy to Use

Being able to use good quality rolling mills is no rocket science if you learn the basics of the machine. You can also get a test run to learn how to operate the mills efficiently.

4. High Productivity Rate 

For a manufacturing unit, large-scale or smaller production facility, a high productivity rate in minimal time is the goal of all. With a one-time investment in rolling mills, you can boost the production rate. These machines can help you save time, ensure accuracy and time efficiency, and are a wise investment overall.

5. Lower Operating Cost

Rolling Mills primarily come in two categories: Hand-powered and Electric rolling mills. Hand-powered rolling mills are cost-effective for a firm and preferable for small-scale manufacturers. Electric rolling mills are known to save power, ultimately reducing costs in the long run.

Choose Us for Reliable Rolling Mills for Your Needs 

Reliable rolling mill plants hire well-trained engineers who cater to all the requirements of a high-functioning rolling mill mentioned above. The various parts of a rolling mill are put through a series of tests by professionals before they are assembled and sent to factories.

Steefo Industries is now a part of the Steefo Group. We only sell tried and tested products to ensure a promising result to our buyers. As a leader in the rolling mill industry, we believe in providing the highest quality and manufacturing standards while verily complying with ISO 9001:2015 certification. We have strived hard to create a name in the industry as the leading and most preferred Rolling Mill Manufacturers since 1976.

Our services include project design and engineering, spares and consumables, technical support and repairs, service agreement program, and revamping & productivity enhancement. 

You can reach out to us at marketing@thesteefogroup.com or call and schedule an appointment at +919824076873. It would be our pleasure to be of service to you!

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6 Ways TMT Bars Rolling Mills Reduce Manufacturing Costs

 

Rolling mills are critical products for the manufacturing industry. So if you have been searching the web to find all you can about TMT bar rolling mills, their applications in the manufacturing industry and the benefits they offer, read on. Here we bring to you everything you should know about TMT rolling mills – particularly about how they can help you reduce manufacturing costs.

What is a Rolling Mill and What is it used for?

In simple words, TMT rolling bars are used in the metal forming process. They are primarily responsible for reducing the thickness of metal and making it uniform across the length and breadth of metal, using a process called rolling. The rolling process also adds strength and durability to the steel. TMT bars that you see around you at construction sites are a product of this rolling process.

Rolling is of two types – Hot Rolling Process and Cold Rolling Process. Both processes are equally rewarding, and they, in their capacities, process more tonnage than any other manufacturing process.

However, there are distinct differences in metals that have been hot rolled or cold rolled. The hot rolling process makes the product more pliable and the surface of the metal, post-treatment, is not shiny. On the other hand, cold rolling yields a harder finished product with a distinct shine on the surface.

What are the Benefits of Rolling Mills?

The rolling aspect in the TMT manufacturing process offers several benefits – the most critical of them being the reduction in material wastage. Here is a glance at the general benefits of rolling:

  1. Rolling ensures that the metal has uniform thickness across its length and breadth
  2. A rolling mill saves you the cost of purchasing different and separate equipment. The same rollers can be used for the production of a wide range of components
  3. Close tolerance is possible for components in the rolling
  4. Saves time as high-speed production takes place in the rolling

How Can Rolling Reduce Costs?

Now that you have understood the generic benefits of using TMT rolling mills and the rolling process, here is the information you have been looking for all this while. Can rolling reduce costs? How?

Yes, rolling can save you a lot of money and here is how:

One of the most important products that come out of the rolling process is TMT Bars. These TMT bars are a preferred choice for most builders because of the strength, flexibility and durability it offers. So in a way, rolling mills can serve you a great deal by saving loads of money. Here is how:

1. Lesser quantity: 

TMT bar manufacturing machines lend TMT bars high tensile strength, which means they are stronger than any other ordinary steel. So TMT rolling mills help you by causing a tremendous drop in the amount of steel required for production.

2. Reduced Labour: 

Through the rolling process, high-performance TMT bars are made. These bars are extremely malleable, which means that they are easier in terms of handling by construction labour and easily transportable. This, significantly, reduces labour and construction costs.

3. Maintenance Savings: 

TMT Bars made in TMT rolling mills are corrosion-resistant. As a result, they stay robust longer even in the face of seasonal wear and tear. Hence, they offer greater RoI and require less maintenance and repair.

4. Protection During Earthquakes

One of the major concerns that manufacturers have to address during the production of construction materials is to ensure that they are earthquake resistant. The TMT manufacturing process strengthens TMT bars to ensure that they can withstand earthquakes efficiently.

5. Flexibility/Usage Benefits

TMT bars are extremely strong, offer flexibility and weldability without compromising on the core strength. This allows builders to not only build stronger structures but also experiment with various designs.

6. Transportation Savings

TMT bars are extremely lightweight and flexible, hence their transportation is easy. As a result, there are lesser labour and transportation costs.

If you are looking for the top TMT manufacturers in India to explore products, you can check out the products by the Steefo Group – one of the top 10 TMT steel companies in India.

Reach out for High-Quality and High-Performance Products

The Steefo Group has been the most trusted name in precision designing, manufacturing and providing top-notch products and solutions in the field of steel rolling for four decades. They are also pioneers in providing consultancy and manufacturing of rolling mill plants. 

For queries related to TMT bar rolling bars, you can reach out to us by calling us at +919824076873 or write to us at marketing@thesteefogroup.com. You can also check with our consultants to understand TMT rolling mill project costs! We would be happy to help!

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5 Crucial Things When Buying a Steel Rolling Mill Machine

 

Although the steel industries of India have witnessed their share of ups and downs in the last few decades, lately they have picked up their pace and are flourishing greatly. Certain factors play a crucial role in your purchase of a steel rolling mill machine. If you happen to be a part of this industry and are looking for a steel rolling mill, here are a few unsaid rules of buying one that you ought to know before you invest in any company across India.

5 Things to Think about When Buying a Rolling Mill Machinery

1. Production facilities in the manufacturing unit

Production facilities play a crucial role in the quality of the products manufactured, especially in producing high-quality rolling mill equipment. It is a known fact that steel is a dense metal, which is why it might be difficult to assess the true capability of various machines shown. You can check the quality of rolling mill machinery using its source. In addition to this, the kind of material used in the machinery, the quality, durability, and resistance, all come into play. Doing so will help you understand whether the company can justifiably deliver trustworthy machinery that meets your needs.

2. The range of the products offered

A steel manufacturer typically provides several products to cater to the varied needs of customers across industries. Ask about the types of rolling mills the manufacturer offers, before deciding to buy from them. This will help you understand how diverse they are and ensure you get a superior quality product. A reliable rolling mill manufacturing company caters to all the requirements by promising to offer high-quality products for various industries.

3. Check the quality

When buying steel rolling mills, ensure the manufacturer offers value for money. Ask about the production methods and quality checks, how their quality control department operates, and they manage the overall operation. This way, you can rest assured about working with a reliable rolling mill manufacturer and receiving high-grade products that suit your specifications.

4. Scope of development

Several rolling mill manufacturers in India have invested dedicatedly in the research and development of the mills. When buying any machinery for your industry, always make sure it fulfils the latest updates in the market and is designed in a manner that leaves space for evolution in the future. It helps to remember that any technological advancements can help improve your performance.

5. Shipping procedure of the company

Last but not the least, it is the smooth and hassle-free delivery that all customers look forward to. Ensure the manufacturer you want to purchase offers flawless machine installation services, and has expertise in concept-to-commissioning. This way, you will get your delivery on time without any issues.

Get High-Quality Steel Rolling Mills with Installation

Steefo Industries is now a part of the Steefo Group. With over 45 of experience in the industry, we are one of the leading rolling mill manufacturers in India. We never negotiate with the quality we deliver and strive for excellence in all our activities. We hold ISO 9001:2015 certification, reflecting the high manufacturing standards we comply with. Our products and services extend to various industrial applications such as reheating furnaces, quenching systems, loopers, DC motors, mill stands, shears, pinch rollers, and more.

You can reach out to us at marketing@thesteefogroup.com or call and schedule a meeting at +919824076873 for more details about our steel rolling mills. It would be our pleasure to serve you!

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What is a Rolling Mill? Why is the Steefo Group the Best Rolling Mill in India?

Hot rolling is a metalworking process whereby metal is heated above its recrystallization temperature for plastically deforming it in the working or rolling operation.

This process is used for developing shapes with the desired geometrical dimensions and material properties while maintaining the same volume of metal. Hot metal is passed between two rolls to flatten it, lengthen it, reduce the cross-sectional area, and for obtaining a uniform & consistent thickness. Hot-rolled steel is the most common product of the hot rolling process, which is widely used in the metal industry. It is extensively used as an end product or as raw material for subsequent operations.

A rolling mill, by its name, suggests a mill or a set up whereby heated billets are rolled between rollers, which result in the production of sheets and bars, into required forms and sections. While the process of hot rolling has matured since the era of industrialism, constant advancement and automation have increased the demand for higher quality.

The Steefo Group, dating its foundation back to 4 decades, has been offering its services to the steel rolling mill industries. Becoming a popular name, Steefo has invariably believed in providing its clients exactly what they aspire with skilled expertise and ever-evolving technology. Steefo has played a pioneering role in the domestic as well as in the international rolling mill industry. Being a one-stop solution for all kinds of hot rolling mill-related products and turnkey solutions, our expertise lies from concept-to-commissioning including planning, design, manufacturing, and installation. With a supportive and backing infrastructure, Steefo has a well-defined working space with all associated facilities. The infrastructure includes updated hardware and software, related to processing equipment. Backed by well-maintained supporting systems for the transportation of goods, a strong communication link has also been established.