Prior knowledge of distinctions between the two methods can help your company save on time, raw material cost, and additional processing. This article aims to explain the differences between hot and cold rolled steel and discuss the advantages and limitations of each.
NOTE: Hot-rolling and cold-rolling should not be mistaken for different grades of steel. Steels of different grades can be produced as hot-rolled or cold-rolled. When steel is heated past its recrystallization point, it becomes more malleable and can be properly formed and shaped. It also allows for the ability to produce larger quantities of steel. When the steel cools off, it will shrink non-uniformly, which gives slightly less control on the overall size and shape of a finished hot-rolled product.
Hot-rolled steel typically has a scaly surface finish. For situations in which the appearance of the material is a concern, the scales can be removed by several techniques: pickling, grinding, or sand-blasting. Cold finished bars are typically harder to work with than hot rolled due to the increased carbon content.
However, this cannot be said about cold rolled sheet and hot rolled sheet. With these two products, the cold rolled product has low carbon content and it is typically annealed, making it softer than hot rolled sheet. Uses: Any project where tolerances, surface condition, concentricity, and straightness are the major factors. You can check out our video below to find out the difference between hot rolled steel and cold rolled steel:.
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Logistics and supply. Metinvest Shipping. Service and engineering. Hot-rolled steel coils. Main Steel coils Hot-rolled steel coils. Select and order Select hot-rolled steel coils or make a fast order. Fast order Select by parameters. Hot-rolled steel coils application. Shaped and round pipes are mainly used in this industry for: Support steel structures and frameworks of industrial and civil facilities Protective enclosures for various utility lines wires and cables, plastic or other channels Support of main pipelines, water lines and heat supply networks, bridges and trestles Sewerage lines, flue ducts and ventilation systems For road construction — poles, guides, drainage elements, lighting columns and crash barriers Steel structures for use in sports grounds and children's playgrounds, to erect fences and partitions, and in other solutions The key requirements of this segment to this kind of rolled product include minimum dimension tolerances, heavy coil weight, weldability, high strength and toughness, crack resistance also at negative temperatures and, for some specific spheres, exterior resistance.
Sizes in high demand: Thickness, mm Width, mm Inner diameter, mm 1. Such technology allows to produce pipes with a diameter of up to 2, mm for the following segments: Main pipelines for transportation of oil, gas and other substances Process pipelines, heat supply networks, water lines and sewerage lines Supports for industrial facilities, bridges and trestles, elements of onshore and offshore platforms For these purposes, the hot-rolled steel sheet needs to be in coils weighing up to 32 tonnes, which makes it possible to increase equipment capacity and yield.
Sizes in high demand: Thickness, mm Width, mm Inner diameter, mm 3. Hot-rolled steel coils classification. Production of hot-rolled coils. The HRC production process includes the following stages: Heating the slab for rolling in a reheating furnace the heating temperature is regulated depending on the steel grade and the selected process conditions Hydraulic descaler to remove scale from the surface of the feedstock Rolling in roughing and finishing stands with intermediate rewinding or without rewinding of the semi-finished strip in a coilbox unit Monitoring the cooling of the rolled strip Winding the finished products on downcoilers Finishing the hot-rolled steel coils, ie cutting, acceptance, packaging, labelling, etc Buy hot-rolled steel coils from the manufacturer Metinvest enterprises produce hot-rolled coils with a thickness of 1.
Get in touch Find the nearest office Subscribe to our newsletter. I agree to the Privacy Policy. Sizes in high demand: Thickness, mm Width, mm Inner diameter, mm. Hot-rolled, normalised rolled, and thermomechanical rolled.
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