The Pros and Cons of Cold Rolled Steel

We’re one of Utah’s top steel suppliers at Wasatch Steel, and we’re here to provide you with all the custom steel you need to complete your next project. Steel sheets of all shapes and sizes are some of our most popular products, and we provide them at industry standard quality.

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There are dozens of different styles and variations of steel sheets. One of the most common ways to classify them is by the temperature at which they were rolled – cold rolled or hot rolled. Let’s look at the pros and cons of cold rolled steel for your next project.

What is It?

When steel is rolled out to form a coil during its production, this is done at varying degrees of temperature. In all cases where this temperature is considered at or below the room temperature, this is considered cold rolled steel.

Cold rolled steel will be smooth to the touch, strong and not particularly flexible. It’s generally found in flat, square or round shapes.

Pros

There are a couple distinct benefits to cold rolled steel:

• Strength: Cold rolled steel is up to 20 percent stronger than typical hot rolled steel. Using heat to roll the steel can weaken it, but keeping it above room temperature holds its structural integrity. This makes it perfect for your biggest and toughest projects.
• Surface finish: Cold rolled steel also looks better than hot rolled. It’s the preferred technique for furniture, cars and other aesthetic areas for this reason, and has a modern look.

Cons

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There are also a couple downsides to cold rolled steel for some people:

• Price: Because of its advantages over hot rolled steel, cold rolled steel is more expensive. Also, because cold rolled steel is tougher to manipulate, it’s takes more time and can cost more to take it through similar processes.
• Width: Shaving down a hot rolling metal sheet is very due to the temperature, but it can’t be done with cold rolled steel. This means you have to be more careful about measuring width in advance – you won’t have any leeway once you get started.
• Time: As we mentioned above, the difficulty in manipulating cold rolled steel can make projects take longer to complete than the equivalent project using hot rolled steel.

The steel industry heavily relies on cold rolling. The cold rolling process involves passing the desired sheet of metal between rollers. (Read more about different types of rolling mills and how to choose the rolling mill machine)

Should the desired result be a sheet or harder and firmer metal, flat rolling is used. For rods or bars of metal, profile rolling is the correct method. 

The beginning of the process involves hot rolling the metal, whereby the temperature of the rollers reaches 900 degrees Celcius or more.

The metal will then be processed into cold rolling, which involves letting the metal cool down to room temperature before pickling the metal. Pickling the metal involves removing the scale that is leftover from hot rolling. The scale will interfere with the process.  

Thereafter, the metal is sent through rollers that are lower than the recrystallisation temperature. This helps to relieve stress from the metal. As a result, the metal will be stronger and harder. 

Each cold rolling process will reduce the metal anywhere between 50 and 90 per cent. Plus, it will increase dimensional accuracy by up to 20 per cent.

For more information, please visit Cold Rolled Steel Manufacturer.