You may have heard of both hot rolled steel and cold rolled steel, but do you know the difference between them? If not, we’re here to help.
Production of both hot rolled steel and cold rolled steel starts with the same steps. They're both initially processed at extremely high temperatures. However, once the treated steel is ready, cold rolled steel goes through a few extra steps. The mill lets the metal cool off until it's room temperature, then draws it through rollers or puts it through annealing treatment. This additional labor makes it more expensive than hot rolled steel.
There are three main visual differences between hot rolled steel and cold rolled steel. Hot rolled steel has rounded edges, a rough surface texture, and no grease on its finish. Alternatively, cold rolled steel has sharp edges, a very smooth surface texture, and an oily or greasy feel to it.
The pros and cons of hot rolled steel come down to strength versus price. Hot rolled steel is weaker than cold rolled, but it’s also cheaper since it doesn’t go through the second production process. However, this doesn't automatically mean cold is better just because it's stronger and more expensive.
The more significant difference in how to use it is how specific your material needs are. Hot rolled steel is perfect for welding, railroad tracks, and I-beams because there is less concern for smooth finishes and precise shapes. The tolerance range is also wider because the metal shrinks during the cooling process, so you can't be as exact with the measurements.
While hot rolled steel has a rougher surface, the aesthetic difference is fixable if that's your only reason for avoiding it. It will add to the total cost, but you can grind or sandblast the steel to a smooth finish.
Cold rolled steel is going to cost more, but it may be worth the higher price tag if it fits your needs. You're going to pay for tight tolerance, smooth finish, and consistency between pieces.
So when should you splurge on the higher-cost option? In addition to the visual benefits of a smooth surface, cold rolled steel is best when you need consistency and tight tolerances on a project. Workers shape the steel at room temperature, so there's no risk of shrinkage during the cooling process. You'll know the exact dimensions you're getting, and every piece is uniform.
Contact us to discuss your requirements of Construction Steel H-Beam. Our experienced sales team can help you identify the options that best suit your needs.