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Hot Rolled Round Bar

Hot rolled round steel bars are used in various applications and industries due to its malleability and formability, which results in products that are easy to work with. Hot rolled steel reconfigures itself during the cooling process, giving the finished product looser tolerances than the original material and when compared to cold rolled steel products. However, this looser tolerance makes the finished product more malleable and easier to form the metal into a variety of shapes and sizes. This makes hot rolled steel a good choice for the manufacturing of structural components.

cold drawn square steel bar

Hot Rolled Round Steel Bar Applications

Round steel bars are exactly as it sounds—a long, cylindrical metal bar. Hot rolled round steel bars are more malleable and can be formed into a wide variety of shapes and sizes while maintaining excellent mechanical properties. They are used where heavy thickness, strength levels, and formability are required, which makes it an ideal choice for producing sheet metals and structural components.

Hot rolled round steel bars are measured by its diameter. They have many applications across many industries including fabrication, manufacturing, and repair. Also, it can be easily welded and drilled. Because it is a durable, ductile, and strong steel material that can be easily formed and shaped, hot rolled round bars are used in various industries, including:

The properties of hot rolled steel make it popular for structural components and applications in which precise shapes and tolerances are not critical. Common applications of hot rolled round bars include:

  • Bolts
  • Fasteners
  • Hydraulic Pipe
  • Fittings
  • Gear Blanks
  • Shafts
  • Tank Flanges
  • Wheel Hubs
  • Connecting Rods
  • Pistons
  • Metal Buildings
  • Water Heaters
  • Agriculture Equipment
  • Strappings
  • Stampings
  • Car and Truck Frames

Grades and Sizes of Round Bar

Eaton Steel Bar Company supplies hot rolled round steel bar stock in a variety of sizes and grades. Other sizes may be available, so contact Eaton Steel for more information. The most commonly stocked grades offered in hot rolled round bar include:

***Minimum Total Quantity Per Order is 10,000 lbs.***

Other grades are available by inquiry.

What are the benefits to hot rolled round steel bar?

Hot rolled steel refers to a steel-rolling process in which flat steel is rolled at extremely high temperatures that exceed the recrystallization temperature of most steels. When steel is above the recrystallization temperature, it becomes malleable and can be shaped and formed. Once heated and molded, hot rolled steel is cooled at room temperature. While this gives the finished product looser tolerances than the original material, it also makes the product free from internal stresses that may occur during heat-treatment processes such as quenching and work-hardening process. Finally, steel shrinks slightly as it cools and so there is less control over its final shape. Thus, hot rolled steel can vary in dimensional consistency and have rougher edges than cold rolled steel.

The following are some characteristics and benefits of hot rolled steel.



Increased formability and flexibility

Can be used to produce parts containing simple bends as well as drawn parts

Increased thickness control

High-force, computer-controlled sets of rolls reduce gradually reduce the slab thickness to the desired finished thickness

Higher production rate

Requires less time to complete the hot-rolling process, so more can be produced

Cheaper and more cost-effective option

Less expensive to manufacture so cost savings are passed along to the customer

Increased width use

Can be formed and shaped into large sheet metal, which has many applications


Hot rolled steel is often preferred over cold rolled steel because of price—it is less expensive to manufacture. It is also ideal in applications where dimensional tolerances are not as important as overall material strength, and where surface finish is not a major concern. Even if surface finish is a concern, scaling can be removed, and various brush or mirror finishes can also be applied. Descaled hot rolled steel also offers a better surface for painting and other surface coatings.