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22/02/2024

The Continuous Cast Billets of TONGGANG Sold Well Overseas

The continuous cast billets of TONGGANG sold well overseas.

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22/02/2024

Maanshan Steel EMU wheels help the Shanghai Municipal Railway Airport Connection Line

Recently, the first train of the new car-building project for the Shanghai Municipal Railway Airport Link Line, supplied by Maanshan Steel for all city EMU wheels, officially arrived at the temporary vehicle maintenance base on Shenkun Road and was received.

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25/12/2023

The First Enterprise-Level “Optical Storage and Charging” Project is Put into Operation at Zhongtian Iron and Steel Group in Changzhou

The first enterprise-level “Optical Storage and Charging” project is put into operation at Zhongtian Iron and Steel Group in Changzhou.

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05/12/2023

Panxi’s first cobalt and nickel resource recovery demonstration line was completed and put into operation

The mining company's newly built Panxi vanadium titanium magnetite cobalt nickel resource recovery demonstration line has been put into operation for more than a month. The production has been stable and has achieved the expected results.

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01/12/2023

The quality of new steel grade XGYZ01 by Xingtai Steel reaches the level of industry benchmark

Recently, the new steel grade XGYZ01 by Xingtai Steel has been optimized by the new routing. Thus the product performance has been significantly improved, in which the total oxygen content has been reduced to about 15ppm, reaching the level of industry benchmark.

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01/12/2023

Bayi Iron and Steel’s Low-carbon Metallurgical 2500 Cubic Meter HyCROF Commercial Demonstration Project Was Put into Operation

On September 28, the 2500 cubic meter HyCROF (Hydrogen-enriched Carbonic oxide Recycling Oxygenate Furnace) commercial demonstration project of Bayi Iron and Steel’s low-carbon metallurgy was officially put into operation.

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29/11/2023

World's First Low-carbon 45-ton Axle Heavy-Duty Wheel Rolls off the Production Line at Masteel

On September 17, the world's first low-carbon 45-ton axle heavy-duty wheel was successfully rolled off the production line at Masteel Rail Transit Materials Technology. The entire manufacturing process of this wheel reduces carbon emissions by more than 20%.

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Answers

What are the differences in thickness and production process between medium and thick steel plates and hot rolled steel plates?
Medium and thick steel plates refer to steel plates with a thickness between 4-60mm, and their production processes mainly include hot rolling cold rolling, and medium and thick plate rolling. Hot rolling is to produce steel plates by continuous rolling after heating the steel billet to a certain temperature; cold rolling is to produce steel plates by continuous rolling after cooling the steel billet to a certain temperature; medium and thick plate rolling is to roll the steel plates produced by hot rolling or cold rolling again to achieve the required thickness.

Hot rolled steel plates refer to flat steel plates produced by hot rolling, and their thickness is generally between 3-20mm. The production process of hot-rolled flat plates mainly includes hot rolling, pickling, and leveling. Hot rolling is to produce steel plates by continuous rolling after heating the steel billet to a certain temperature; pickling is to remove the iron oxide and impurities on the surface of the steel plate; leveling is to level the steel plate through a leveling machine to achieve the required flatness.
What are the differences between PE lining and plastic coating?
PE lining is made of thermoplastic plastic pipes such as polyethylene (PE), heat-resistant polyethylene (PE-RT), cross-linked polyethylene (PE-X), and so on, which are lined on the inner wall of steel pipe according to the requirements of the conveying medium, so it has the advantages of both steel pipe and plastic pipe.
Plastic-coated composite steel pipe is a steel-plastic composite product with steel pipe as the base material and plastic powder as the coating material, with a plastic layer melt-coated on the inner surface and a plastic layer or other material anti-corrosion layer melt-coated on the outer surface.
According to the different inner coating materials, there are two types, one is polyethylene-coated steel pipe. The other is epoxy resin-coated steel pipe.
What are the acceptance criteria for hot-dip galvanized square tubes?
Hot-dip galvanized square tubes are generally judged to be qualified based on the appearance of the product. If the outer wall of the square tube has plating defects, pitting, white spots, heavy skin, bubbles, greening, etc., and the frequency of occurrence is too high, it is judged as an unqualified product. However, the product standard has a specified range for the allowable deviation of the product, which should meet the design requirements and relevant standards.


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