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Hot Rolled Steel

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Very basically speaking, recrystallization temperature is the point at which a metal becomes sufficiently ductile to be shaped without breaking. Ductility is the measure of a material’s capacity to be shaped without breaking. Generally, the higher the temperature to which a metal is heated, the higher its ductility. Read More…

Hot Rolled Steel Hot rolling is a metal forming process in which a metal is heated above its recrystallization temperature and rolled into a shape by a series of rollers.
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Leading Manufacturers

Skokie, IL  |  847-966-3000

Block Steel Corp, ISO/TS 16949 Certified, specializes in aluminized steel and is the country’s largest aluminized steel distributor. We also stock Aluminized Stainless, Hot Dipped Galvanized, and distribute tubing.

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Block Steel Corp. $$$

Bala Cynwyd, PA  |  800-355-0888

At Mainline Processing, we utilize our own facilities and equipment to meet our customers’ needs with an organized and growth-driven model. We stock large quantities of material in our inventory so that our customers can take advantage of purchasing opportunities where they can feel confident that they have the proper steel for the proper end use.

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Mainline Metals Inc. $$$

Birmingham, AL  |  800-462-2034

We are the nation’s largest family-owned metals service center. In business for 85 years, our steel service center is the source for all metal needs. Our structural steel includes many shapes such as steel tubing, along with cold rolled steel, tool steel, alloy steel, plate steel and carbon steel.

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O'Neal Steel, Inc. $$$

Grand Blanc, MI  |  888-273-8299

As a world-class source for steel products, King Steel Corporation supplies companies across North America with what they need to get the job done. For over 50 years, we have continued to invest a great amount of both time and capital into purchasing new equipment and streamlining our processes. We’ve worked diligently to develop and maintain a reputation in our industry that represents growth, professionalism, value, and prosperity for both our customers and suppliers.

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King Steel Corporation $$$

Houston, TX  |  800-749-4621

Cold Rolled Steel is a mill product made with a high degree of gauge accuracy and uniformity of physical characteristics. The smooth deoxidized matte finish gives an excellent base for paint, lacquer and enamel. Box annealing and absence of scale permit stamping and moderate drawing operations. Sheets bend flat on themselves without cracking. Our Cold Rolled sheet and coil conform to ASTM A1008.

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Curtis Steel Co., Ltd. $$$
placeholder image Block Steel Corp. Mainline Metals Inc. O'Neal Steel, Inc. King Steel Corporation Curtis Steel Co., Ltd.

When steel is heated beyond its recrystallization temperature and pushed between a set of rollers, the sheets that emerge from the rolling process exhibit qualities of high strength and good formability. This type of steel is not as hard as cold rolled steel, but is often used for high strength and structural applications within the automotive, appliance, railroad and ship building industries.

Hot rolled steel is used for a wide variety of products, such as frame components for cars, wheels, tubing, agricultural equipment parts and machinery parts. It is usually a blue-grey color and is only painted if it has been pickled with zinc or iron phosphates. This type of steel is available in yield strengths up to 60 ksi.

To produce hot rolled steel, steel service centers heat semi-finished slabs of steel nearly to their melting point in a furnace, where they become easily moldable. The slab is pushed through a set of rollers, a process comparable to rolling cookie dough with a rolling pin. Its thickness is cut down from eight or nine inches to between one and 1.5 inches.

The steel is then cropped into different shapes by a pair of steel drums with large shearing blades and left to return to room temperature. As it cools, a metallurgical transformation in the steel's crystal structure takes places, which hardens the steel considerably. Outside processing, such as pickling, temper rolling, re-squaring, slitting and cutting-to-length is done after the rolling process is complete.

Pickling, for example, is the process of surface treating hot rolled steel with strong acids. Because steel is susceptible to oxidization, especially when exposed to heat, hot rolling can cause an undesirable film to form on the surface of the steel. Pickling can remove this film without risking deformation to the steel's surface. Other physical machining processes can also be used to remove such films.

Hot Rolled Steel Informational Video