Hot Rolled Black Bars

Introduction to Hot Rolled Black Bars:
Hot rolled black bars are a popular category of steel products known for their versatility, strength, and cost-effectiveness. These bars are created through a hot rolling process, which involves heating steel billets above their recrystallization temperature and then passing them through rolling mills at high temperatures. The result is a smooth, black oxide layer on the surface, giving the bars their distinctive appearance and improved mechanical properties.

Melting Routes:
At Steel & Alloys, we understand the importance of using high-quality raw materials to produce top-notch hot rolled black bars. To ensure the best quality, we utilize various melting routes to obtain the required steel grades. Some of the common melting routes we employ include:

Electric Arc Furnace (EAF): This method involves melting recycled steel scrap using electric arcs. EAF is known for its energy efficiency and ability to produce a wide range of steel grades.

Basic Oxygen Furnace (BOF): In the BOF process, pig iron is combined with scrap steel and oxygen to produce molten steel. BOF is favored for its capability to produce large quantities of steel at a time.

Induction Furnace: Using electromagnetic induction, this process melts the steel by passing an electric current through a coil. Induction furnaces are ideal for producing high-quality steel with precise control over composition.

The Hot Rolling Process:
Hot rolling is a metalworking process that converts steel billets into various shapes, including rounds, squares, flats, and hexagons. The process starts with heating the billets in a reheat furnace, followed by their passage through roughing and finishing mills. During this process, the steel undergoes deformation, reducing its thickness and increasing its length. The final product is then allowed to cool naturally, forming the black oxide layer on its surface.

Sizes Available:
We offer a wide range of hot rolled black bars to meet your diverse requirements. These bars come in various sizes, ensuring you find the perfect fit for your project needs. Whether you're looking for small-diameter rounds or larger-sized squares and flats, we have you covered.

Standards Governing Hot Rolled Black Bars:
Our hot rolled black bars adhere to the highest industry standards. The products are manufactured following Indian, European, American, and British standards, ensuring the highest quality and performance. Some of the standards that govern these hot rolled products include:

- Indian Standards: IS 2062, IS 808, IS 1852
- European Standards: EN 10025, EN 10059
- American Standards: ASTM A36, ASTM A572
- British Standards: BS 4449, BS 4848

Grades of Steel and Available Sizes:
We take pride in offering a wide selection of steel grades in each section type:

1. Rounds: Our hot rolled black rounds are available in various grades such as SAE 1018, SAE 1045, and more. Sizes range from 6mm to 100mm in diameter.

2. Squares: Choose from a range of square bars in grades like EN 8, EN 9, SAE 4140, and others. Sizes start from 8mm and go up to 80mm.

3. Flats: Our hot rolled black flats come in grades like IS 2062, EN 10025 S355JR, and more. Sizes range from 20mm width to 200mm, with thickness options from 3mm to 25mm.

4. Hexagons: For hexagonal bars, we offer various grades like ASTM A193 B7, SAE 12L14, and more. Sizes are available from 10mm to 60mm across flats.

Heat Treatment Options:
To further enhance the mechanical properties of our hot rolled black bars, we offer various heat treatment options. Each heat treatment process imparts specific characteristics to the steel, making it suitable for different applications. Our heat treatment options include:

As Rolled: The hot rolled black bars can be supplied as rolled, retaining the properties acquired during the hot rolling process. As rolled bars offer excellent formability and are ideal for applications where further heat treatment is not required.

Annealed: Annealing involves heating the steel to a specific temperature and then cooling it slowly. This process relieves internal stresses, improves machinability, and enhances ductility.

Normalized: Normalizing is a heat treatment process in which the steel is heated above its critical temperature and then air-cooled. This treatment refines the grain structure, resulting in improved strength and toughness.

Quenched and Tempered: This heat treatment involves heating the steel to a specific temperature, followed by rapid quenching in water or oil and then tempering. Quenching and tempering impart high strength and wear resistance to the steel.

Stress Relieving: Stress relieving is a low-temperature heat treatment that removes internal stresses without significantly affecting the steel's hardness. It is particularly useful for minimizing distortion in welded components.

Advantages of Hot Rolled Black Bars:
- Excellent formability and machinability
- High tensile strength
- Cost-effective solution
- Versatile applications across industries
- Black oxide layer provides enhanced corrosion resistance

Applications:
Hot rolled black bars find applications in various industries, including construction, manufacturing, automotive, agriculture, and more. These bars are extensively used in the fabrication of machinery parts, shafts, fasteners, and general engineering components.

Conclusion:
At Steel & Alloys, we take pride in offering a wide range of high-quality hot rolled black bars. Our commitment to adhering to international standards ensures that our products meet the highest industry benchmarks. With various grades and sizes available, you can find the perfect solution for your project needs. Browse through our catalog or get in touch with our team to discuss your requirements and let us help you find the ideal hot rolled black bars for your applications.

Hot Rolled Black Square Steel Bar