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Stainless Trivia
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Making of HRAP coils
Hot rolling involves the following processes:
- Reheating: It involves heating to above recrystallization temperature. The non-uniform initial cast grain structure of metal consists of large dendritic grains. They are usually brittle with weak grain boundaries and may contain defects such as shrinkage cavities, porosity caused by gases, and foreign materials such as metallic oxides. Reheating breaks the dendritic grain structures obtained during casting, giving rise to the formation of new uniform recrystallized grain structures.
- Roughing & Finishing: The reduction is given up to approximately the required coil thickness from the initial stainless steel slab and stainless steel bloom thickness using roughing and finishing mill. The finishing mill can be either Steckel (reversible) or a Tandem (continuous) mill.
- Laminar cooling: In some grades, rapid cooling of hot rolled coils is done using water in order to bring down the temperature below 500°C
- Coiling: It is done in order to make the hot rolled sheet convenient for further processing and transportation.
FEATURES
Hot-rolled coils are often used in applications where dimensional tolerances are not very critical, such as railroads and construction materials.
HR Black: The hot rolled coils develop a brownish-black oxide layer on the surface after processing, hence referred to as “HR Black coils.”
HRAP: If a better surface finish is required, then oxide scaling can be removed by shot blasting (mechanically) and pickling (chemically) in order to obtain a No. 1 finish as per ASTM A480/A480M specifications. Hot rolled coils are annealed and pickled in continuous annealing-pickling lines having a scale breaker, shot blasting unit, electrolytic sulphuric acid, and mixed acid bath.
HRAP coils have a cleaner surface and have improved mechanical properties for downstream processing.
MANUFACTURINGRANGES
Jajpur, Odisha
| Product | Max Width | Thickness | ||
|---|---|---|---|---|
| Min | Max | Min | Max | |
| Hot Rolled Coil |
1000 |
1650 |
2.0
* |
10 |
| N1 |
1000 |
1650 |
2.0
* |
10 |
| 2E |
1000 |
1600 |
1.4
* |
6.7 |
Hisar, Haryana
| Product | Max Width | Thickness | |
|---|---|---|---|
| Min | Max | ||
| Hot Rolled Coil |
1270 |
2.0
* |
12.0 |
| HRAP Coil |
1270 |
2.5
* |
8.0 |
Frequently Asked Questions
What is a hot- rolled stainless steel coil?
+The hot-rolled stainless steel coil is a type of stainless steel that is processed at high temperatures, typically ranging from 900°C to 1200 C. It is passed through a series of rollers to achieve the desired thickness and shape, making it suitable for a wide range of industrial uses.
What is the hot rolling process of stainless steel?
+The hot rolling process involves heating stainless steel above its recrystallisation temperature and passing it through rollers to form it into sheets. These long and thin sheets are spun into coils and left to cool. This process improves the material’s ductility and toughness.
What is hot- rolled stainless steel?
+Hot-rolled stainless steel is stainless steel that has been heated and rolled to create a strong, flexible product. It can be applied in projects where dimensional tolerance is not very critical like railroads and construction materials. It offers excellent durability and heat resistance.
Why is it called hot-rolled stainless steel?
+It is called hot-rolled stainless steel because the stainless steel is processed while it is hot, above its recrystallisation temperature, which allows for easier shaping and sizing of the material.
What industries commonly use hot rolled coils?
+Hot-rolled coils are commonly used in industries such as construction, especially in railroads where dimensional tolerance is not very critical. These coils are valued for their strength and versatility in various high-stress applications.
What are the features of hot- rolled coils?
+Hot-rolled coils are perfect for applications in railroads and construction materials. The HR black coils develop a brownish-black oxide layer on the surface after processing, and can also be applied as per your project specifications. If a better finish is required then oxide scaling can be removed mechanically as well as chemically. Hot-rolled coils have a cleaner surface and have improved mechanical properties for downstream processing.
Read More
Premium Stainless Steel Hot Rolled Coils for Diverse Applications
Jindal Stainless offers premium stainless steel hot rolled coils, which are known for their strength, durability, and adaptability across a wide range of industries. These coils are produced with precision, ensuring high quality that meets the demanding needs of sectors such as construction, automotive, energy, packaging, and heavy machinery. Jindal Stainless is an established leader in stainless steel manufacturing, delivering hot rolled coils that provide reliable performance in even the most challenging environments.
Why Choose Jindal Stainless’s Stainless Steel Hot Rolled Coils?
Choosing Jindal Stainless for stainless steel hot rolled coils means investing in a product that delivers exceptional durability and heat resistance making them suitable for applications in a wide range of industries. Jindal Stainless’s extensive experience in stainless steel production ensures that each coil is made with the highest precision and attention to detail, ensuring long-lasting performance and reliability.
High-Quality Hot Rolled Stainless Steel for Industrial Applications
Jindal Stainless’ hot-rolled stainless steel is engineered to meet the stringent demands of various industrial applications. Whether used in heavy machinery, infrastructure development, or manufacturing, these stainless steel hot-rolled coils offer superior strength and flexibility. The hot rolling process enhances the stainless steel’s mechanical properties, ensuring it can endure high-pressure environments while maintaining its structural integrity. This makes Jindal Stainless a trusted choice for industries requiring robust and reliable materials.
Leading Hot Rolled Coil Manufacturers
As one of the leading hot-rolled stainless steel coil manufacturers, Jindal Stainless is renowned for its advanced production facilities and global distribution network. Our commitment to innovation and quality control ensures that every stainless steel coil produced meets international standards. With a reputation for excellence, we continue to supply hot rolled coils to businesses worldwide, making us a top choice among stainless steel coil manufacturers.
Competitive Hot Rolled Coil Pricing
Jindal Stainless offers competitive pricing on hot rolled coils, ensuring industries of all sizes can access high-quality materials at cost-effective rates. The hot rolled coil prices are designed to suit various budgetary requirements without compromising on the quality or performance of the product. Whether you’re looking for stainless steel hot rolled coil prices or specific solutions for your industry, we provide the ideal balance of affordability and reliability.
Durability and Strength of Hot Rolled Coils
The durability of Jindal Stainless hot-rolled stainless steel coils is unmatched, making them an ideal solution for structural applications where strength and resilience are critical.
These HR coils are crafted to withstand extreme temperatures and mechanical strain, offering long-lasting performance in tough environments. With a focus on both durability and strength, our hot-rolled coils are the preferred choice for businesses.