Know Your Grades of Steel and Uses
To know the difference between cold-rolled vs. hot-rolled steel bars, it is necessary to understand that steel has grades according to its component alloys. For example, there are carbon, nickel, chromium, chromium-vanadium, nickel-chromium, tungsten, molybdenum, silicon-manganese, and Nickel-chromium-molybdenum steel alloys in various types of steel.
Each steel type has specific properties that react to cold and heat. For example, stainless steel is a chromium-carbon alloy that allows for temperatures of 1700 deg. F. for 304 and 316 stainless designations and up to 2000 deg. F. for high temp stainless grade 309(S). The temperature range for 310(S) is up to 2100 deg. F.
Hot Rolled Steel Bar Grades:
- ASTM A36 useful for general structural applications
- HR Bars 1117 is a medium grade of carbon steel best to use when greater hardness and strength are a must.
- HR Bars 11L17 useful for machining
- HR Bars 1045 is useful for its hardness and strength for axles, bolts, machine parts, studs, shafts, and gears when flame and induction-type hardening is a must.
- HR Bars 1141 has a uniform heat treatment response for machinability
Cold Rolled Steel Bar Grades:
- CR Bars 12L14 – useful in high-end fast machining speeds such as screw machining. It has fine surface quality and flexibility.
- CR Bars 1018 – Because of its low carbon and medium manganese content, this grade offers only fair use for machinability but can undergo welding and brazing.
What is the Difference Between Cold Rolled vs. Hot Rolled Steel Bars?
In metal manufacturing, the difference between cold-rolled and hot-rolled steel is the process to create and form both. As their names indicate, ambient temperatures are helpful for cold-rolled steel and heat for hot-rolled steel.
The other difference between the two lies in cost. Hot-rolled steel is less expensive since it goes manufacturing quickly and without reheating. The construction and welding industries favor hot-rolled steel. Hot-rolled steel grades are not as significant as the manufacturing process.
Cold-rolled steel tends to shrink after it is created and formed, adding to the metal manufacturing time.
Hot Rolled Steel Bars
Hot-rolled steel bars are useful for I-beams, general fabrication projects, structural supports, walkways, ramps, and trailers.
A steel round bar is often seen in machined parts like axles, frameworks, supports, bolts, etc. A steel round bar is available in hot or cold-rolled steel.
In metal manufacturing, a round steel bar is measured in diameter. Cold-rolled round bars are cylindrical and commonly useful for rods, spindles, sprockets, and shafts.
Hot rolled round bars are formable, challenging, and preferred for welded steel materials. It is easily shaped and easy to drill.
How Metal Fabricators Choose Cold Rolled vs. Hot Rolled Steel
Whenever metal fabricators take on projects that require cold-rolled or hot-rolled steel, they must first decide on the need for precise dimensions and the quality of the steel surface.
When choosing a metal fabricator for a project, they should work closely with metal manufacturers in various industries and offer precision services for the hot-rolled or cold-rolled steel required. These services should include the following:
- Straightening
- Custom machining
- Polishing
- Precision Grinding
- Centerless grinding
- Chamfering
Metal fabricators use hot and cold rolled steel that requires precision grinding of a precision-ground bar to produce according to customer specifications. Working with hot and cold rolled steel to shape, form, bevel, and grind for various uses has become an industrial art form.
For example, the ratio of metal fabricators in the U.S. is under 25,000. This keeps a metal fabricator like Advance Grinding Services Inc. continuously busy when customers request the number of metal grinding projects has grown by overwhelming numbers.
Advance Grinding is an Industry Leader
A critical feature of the skilled staff of Advance Grinding Services Inc. is that they are certified by ISO 9001:2008 standards. This symbolizes the excellent quality set by the Advanced Grinding Services team. In addition, Advanced Grinding Services takes pride in maintaining SOTA (state-of-the-art) technology.
This ensures customer satisfaction which is an Advanced Grinding Services priority. In addition to exceptional performance, the staff maintains timely service customers rely on to expedite their projects and needs.
Advance Grinding Services Inc. is ready to assist if your project requires a hot or cold rolled precision ground bar, centerless grinding, or other additional services. For more details or to request up to three quotes online, visit Advance today!
