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Hot rolled steel is a type of steel that is formed using the hot rolling process at a temperature above its recrystallization temperature. Steel is easier to shape at this elevated temperature. Compared to cold rolled steel, hot rolled steel typically does not require any post-forming heat treatment. Hot rolled steel usually has more mill scale than cold rolled steel.
Hot rolled steel is steel that has been roll-pressed at very high temperatures-over 1,700˚F, which is above the re-crystallization temperature for most steels. This makes the steel easier to form, and resulting in products that are easier to work with.
To process hot rolled steel, manufacturers first start with a large, rectangular length of metal, called a billet. The billet is heated and then sent for pre-processing, where it is flattened into a large roll. From there, it is kept at a high temperature and run through a series of rollers to achieve its finished dimensions. The white-hot strands of steel are pushed through the rollers at high speeds. For sheet metal, rolled steel is spun into coils and left to cool. For other forms, such as bars or plates, materials are sectioned and packaged.
Steel shrinks slightly as it cools. Since hot rolled steel is cooled after processing, there is less control over its final shape, making it less suitable for precision applications. Hot rolled steel is often used in applications where minutely specific dimensions aren't crucial. Railroad tracks and construction projects often use hot rolled steel.
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All specifications products can be customized according to customer requirements
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item
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Hot Rolled Carbon Steel Coil
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Standard
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AiSi, ASTM, bs, DIN, GB, JIS Etc
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Thickness
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0.9-16mm or customized
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Width
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600-1500mm or customized
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Length
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1-1000m or customized
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Grade
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Q195 Q235 Q355 A36 SS400 S235JR S275JR S355JR Etc
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Surface Treatment
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Non-oiled, Normal Oiled, DOS Oiled
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Processing Service
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Welding, Punching, Cutting, Bending, Decoiling.We accept custom orders of various sizes.
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Delivery Time
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Usually within 7 days, timed according to the number of
customers.
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Material
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ASTM/AISI/SGCC/CGCC/TDC51DZM/TDC52DTS350GD/TS550GD/DX51D+Z Q195-Q345 Etc
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Payment method
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T/T, D/A, D/P, L/C, Western Union, MoneyGram or according to customer requirements
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Packing
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Standard packaging, can be packaged according to customer requirements
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MOQ
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3 Tons,and sample is available.
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Appication
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light industry, automobile, agriculture, animal husbandry, fishery and other industries.Such as building roofs, highway guardrails, sheet metal processing, roof grilles, household appliance enclosures, vention ducts, chimneys,kitchen utensils, grain storage and transportation, frozen processing of meat and aquatic products, etc. |
It's important to note that the main difference between hot rolled and cold rolled steel is one of process. "Hot rolling" refers to processing done with heat. "Cold rolling" refers to processes done at or near room temperature. Although these techniques affect overall performance and application, they should not be confused with formal specifications and grades of steel, which relate to metallurgical composition and performance ratings. Steels of different grades and specifications can be either hot rolled or cold rolled-including both basic carbon steels and other alloy steels.
It may seem obvious, but some types of steel are better suited for certain applications. Knowing which to use can help avoid over-spending on raw materials. It can also save time and money on additional processing. Understanding the differences between hot and cold steel is integral to choosing one over the other.
Carbon Steel coil
Rolling is divided into cold-rolled and hot-rolled steel sheets, and the recrystallization temperature is the distinguishing point. The hot-rolled sheet has poor toughness and surface smoothness, and the price is low, while the cold-rolled sheet has good stretchability and toughness, but the price is more expensive. The cold-rolled sheet is cold-rolled, and the
surface has no oxide skin and is of good quality. The hot-rolled sheet is processed by hot rolling, and the surface has an oxide scale, and the thickness of the sheet is poor.
| Standard and grade | National standard | Comparable to foreign standards | ||
| Material category | Executive standard | Grade | Standard | Grade |
| Mild Steel Coil |
Q/BQB302 | SPHC | JISG3131 | SPHC |
| SPHD | SPHD | |||
| SPHE | SPHE | |||
| SAE1006/SAE1008 | SAE1006/SAE1008 | |||
| XG180IF/200IF | XG180IF/200IF | |||
| general structural steel | GB/T912-1989 | Q195 | JISG3101 | SS330 |
| Q235B | SS400 | |||
| SS400 | SS490 | |||
| ASTMA36 | SS540 |
Hot rolled steel typically requires much less processing than cold rolled steel, which makes it a lot cheaper. Because hot rolled steel is allowed to cool at room temperature, it's essentially normalized-meaning it's free from internal stresses that can arise from quenching or work-hardening processes.
Hot rolled steel is ideal where dimensional tolerances aren't as important as overall material strength, and where surface finish isn't a key concern. Where surface finish is a concern, scaling can be removed by grinding, sand blasting, or acid-bath pickling. Once scaling has been removed, various brush or mirror finishes can also be applied. Descaled steel also offers a better surface for painting and other surface coatings.
Hot-rolled steel products are widely used in manufacturing industries such as ships, automobiles, bridges, construction, machinery, and pressure vessels due to their excellent properties such as high strength, high toughness, easy processing, and excellent weldability. Therefore, there is a huge demand for HRC in the market.
Applications:
(1) After annealing, it is processed into ordinary cold rolling;
(2) The galvanizing unit with the annealing pretreatment device processes galvanizing;
(3) A panel that basically does not require processing.
Jinan Zunkai Group founded in 2002,with five branch companies and is well-founded.
Our annual sales nearly one billion,about 300000 tons steel.
Our company is located in jinan City,ShanDong Province.
We entered into a strategic partnership with Bao Steel,laiwu Steel,Rizhao Steel,Handan Steel,Anyang Steel,Maanshan Steel and other domestic large steel companies.
Zunkai is the largest steel aluminum and copper supplier in Shandong Provinces,
we also have ourselves raw materials process factory with 100000 Square meter for steel laser cutting,surface treatment and other further processing,and our stock always more than 20000 tons.
Zunkai Group mainly engaged in:aluminum sheet,copper tube,galvalume steel,PPGI,galvanized steel,steel plate,round bar,steel pipe,stainless steel product,angle bar,steel pile,H beam,I beam,angle,Channel flat steel ect.
Our good quality and reliable service will be your best trusted partner.Sincerely wish to building long and regular business with you forever.
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