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19/08 17:09
< On August 19, the price of wire rod in Qingdao fell slightly. HPB300 (ASTM A615 Grade 40) Yongfeng Φ6mm 536.93, down 5.56. (USD/ton)
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19/08 17:03
< On August 19, there was not much fluctuation in the price of angle steel in Tangshan. Q235B (ASTM A36) Zhengfeng 200*200*16mm 485.46, up 1.39. (USD/ton)
19/08 17:02
< On August 19, the price of boiler steel plate in Rizhao fell slightly. Q345R (ASTM A516 Grade 70) 16mm Rigang price is 599.52, down 5.56. (USD/ton)
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19/08 16:59
< On August 19, the price of welded steel pipe in Guangzhou fell slightly. Q235 (ASTM A36 Gr.D) Zhenhong DN100 (4"*3.75mm) 518.84, down 1.39. (USD/ton)
19/08 16:58
< On August 19, the price of hot rolled steel coil in Shenyang fell slightly. Q235B (ASTM A36) HBIS 7.5-11.75*1500*C 475.72, down 2.78. (USD/ton)
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19/08 16:57
< On August 19, the price of electro-galvanized steel sheet & coil remained stable in Shanghai. SECC (ASTM A879/A879M-22) Bengang 0.8*1250*C 664.90. (USD/ton)

Answers

  • What are the thermal insulation properties of colored aluminum coils?

    Based on their material properties, colored aluminum coils typically utilize special thermal insulation coatings or structural designs. The colored coating not only serves a decorative purpose but also effectively reflects most of the sunlight, reducing heat absorption. Furthermore, the aluminum material itself has excellent thermal conductivity, quickly dissipating and transferring heat to prevent localized overheating.

    The thermal insulation properties of colored aluminum coils also offer a certain degree of stability and durability. Professionally treated, the thermal insulation coating resists fading and aging, maintaining excellent insulation performance over time and reducing repair and replacement costs associated with degraded insulation performance.


  • What is 8K stainless steel?

    8K stainless steel is a type of stainless steel with a smooth, mirror-like finish. Its surface is ground and polished to achieve a mirror-like finish.
    8K mirror panels are corrosion-resistant and can also be processed through processes such as plating and etching. They are mainly used in various decorations or metal optical products.
    The corrosion resistance of stainless steel plates mainly depends on their alloy composition (chromium, nickel, titanium, silicon, and manganese, etc.) and internal organizational structure, among which the chromium element plays a decisive role. It can form a passivation film on the surface of steel, isolating the metal from the outside world and thus hindering oxidation, thereby enhancing the corrosion resistance of stainless steel plates.
    The "8" in 8K mirror stainless steel plate refers to the proportion of alloy components. Taking 304 stainless steel plate as an example, its "8" value is the nickel content; and "K" refers to the level of reflectivity that can be achieved after the stainless steel plate is polished (K grade is the level of mirror reflection), so 8K mirror plate is the mirror grade reflected by chromium-nickel alloy.


  • What's the difference between Larsen steel sheet piles and regular steel sheet piles?

    Steel sheet piles are categorized by production process into cold-bent and hot-rolled types. Cold-bending involves continuously cold-bending steel strips to form various shapes, such as U-shapes. Hot-rolling involves welding and hot-rolling to produce sheet piles. Hot-rolling is a more advanced process than cold-bending, resulting in a tight, water-tight interlocking joint. Cold-bending is also relatively inexpensive and offers a higher cost-performance ratio.

    By shape, sheet piles can be categorized as U-, Z-, L-, S-, and straight. U-shaped sheet piles, also known as Larsen sheet piles, are the most common.
    Larsen piles are easy to produce, offer guaranteed performance, high rigidity, strength, and reusability, making them highly sought after in the market. The locking ends of the Z-shaped steel sheet pile are symmetrically distributed on both sides of the central axis, and the web is continuous, which has a higher moment of inertia, thereby increasing the stiffness of the pile and reducing deformation. Due to its unique cross-sectional shape, it exhibits better water-stopping and corrosion resistance.


    Larsen steel sheet piles are U-shaped steel sheet piles with locking tabs at both ends, allowing them to interlock together to form a single sheet pile wall. They offer excellent sealing, high rigidity, and strength, providing both soil and water retention, strong support capabilities, and reliable stability. They require the appropriate type of pile driver to be selected based on soil conditions and pile size.

    Regular steel sheet piles are similar to channel steel in a U-shape and lack locking tabs at both ends. While they retain soil, they lack strong water retention. The thickness of the steel is not strong, and they are prone to deformation after use, requiring correction and maintenance. They can be used for support in locations with less stringent environmental requirements. They are inexpensive, can be used in large quantities, are easy to install, and can be driven with an excavator.


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