Hot rolling is relative to cold rolling. Cold rolling is rolling below the recrystallization temperature, while hot rolling is rolling above the crystallization temperature. Simply put, a piece of steel billet is rolled several times after heating, and then trimmed and corrected into a steel plate. This is called hot rolling. It can significantly reduce energy consumption and reduce costs. During hot rolling, the metal has high plasticity and low deformation resistance, which greatly reduces the energy consumption of metal deformation. Hot rolling can improve the processing performance of metals and alloys, that is, to break the coarse grains in the casting state, significantly heal cracks, reduce or eliminate casting defects, transform the cast structure into a deformed structure, and improve the processing performance of the alloy.
Q235B Hot-rolled steel application
Q235B Hot-rolled steel is used to manufacture steel structures, pipes and closed sections, as well as to enclose structures and facade elements. 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
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Sizes in high demand: Thickness, mm Width, mm Inner diameter, mm |
3.0-25 1,000-2,100 700+/-50; 750+/-50; 850+/-50 |
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Weight, t |
Up to 32 |
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Steel grades in high demand |
For pipelines: А, В, X42, X46, X52, X56, X60, X65, X70, X80, Х90, etc (API 5L and customer specifications) For structures and supports: A, B, D, E, A32, D32, E32, A36, D36,E36, A40, D40, E40, F40 or their equivalent as per shipbuilding registers; S235-S960 as per EN 10025 (i. 1-6), EN 10225 |
Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.
Q:What are the certifications for your products?
A:We have ISO 9001, SGS, EWC and other certifications.
Q:What is your working time?
A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry during the next working day.
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