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Hot Rolled Square Bar

Hot rolled square steel bars offer high workability, which makes them easy to weld, form, cut, and machine. These characteristics make square steel bars a very desirable material for various industrial applications, such as welding, construction, repairs, and general fabrication.

Manufacturing hot rolled square steel bars involves passing steel through rollers to shape the metal to a specific thickness at temperatures exceeding steel’s recrystallization temperature. When steel is above the recrystallization temperature, it can be easily shaped and formed. This allows the steel to be drastically reduced in thickness with only single pass. Compared to cold rolled steel, hot rolled steel is not only easier to work with during and after the rolling process, it is also cheaper to produce.

cold drawn square steel bar

Hot Rolled Square Steel Bar Applications

Hot rolled square steel bars will change shape and size during the cooling process, thus resulting in slightly rounded edges and corners. They are also characterized by a rough surface finish due to extreme temperature cooling process. Hot rolled square bars maintain excellent mechanical properties and is easy to fabricate using conventional methods, including hot forming and mild cold forming.

Square steel bars are used where heavy thickness, strength levels, and formability are required, which makes them an ideal choice for producing structural components. Also, hot rolled square steel bars can be easily welded and drilled. They are used in various industries and applications, 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 square steel bars include:

  • Shafts
  • Axles
  • Dowels
  • Slides
  • Threaded Fixtures
  • Tooling Blocks
  • Power Tools
  • Pins
  • Anchor Bolts
  • Structural Parts
  • Ratchets
  • Tool Holders
  • Screw Machines
  • CNC Lathes
  • CNC Mills
  • Rotary Transfer Machining
  • Hydraulic Fittings
  • Gears
  • Bushings
  • Fasteners
  • Cylinders
  • Pipe Fittings

Grades and Sizes of Square Bar

Eaton Steel Bar Company supplies hot rolled square 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 square bar include:

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

Other grades are available by inquiry.

Hot rolled square steel bars are classified commonly in the following ASTM and SAE specifications:

  • SAE J403 Carbon Steel Bars
  • SAE J404 Alloy Steel Bars
  • ASTM A 29
  • ASTM A 322
  • ASTM A 576 Special Bar Quality Steel Bars
  • ASTM A 304 H Band Steel Bars
  • ASTM A 434 BC & BD
  • ASTM A 193 B7 Quench and Tempered Steel Bars

What are the benefits to hot rolled square 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, which makes it very malleable. 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.

BENEFITS OF HOT ROLLED STEEL

BENEFIT TO THE CUSTOMER

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.

Interested in Eaton Steel's Hot Rolled Catalog?
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