+86-400-1866-598 cs@chinasteelmarket.com +86-18864881658 (Whatsapp&Wechat)
Login | Register
Empowering small and medium-scale steel purchasing
Quickly obtain FOB/CIF price
Home > Feature pages

Feature pages

  • 02/12/2024

    FEATURE| Main Shipping Routes for International Logistics Transportation

    The routes of maritime transport are distributed between the oceans, which is also the advantage of maritime transport over other modes of transport. When choosing a route, the conditions of the cargo, ships, and ports must be considered, and a comprehensive assessment of the system organization must be made before a reasonable choice can be made.

    Read More

  • 30/09/2024

    FEATURE|The Analysis of the Development Status of Steel Market in Shandong Province(China)

    ​Affected by the terminal market, domestic steel demand will continue to be sluggish, which will lead to inventory backlogs. Therefore, merchants generally begin to seek overseas orders. Domestic steel prices are in the global price trough, and the RMB exchange rate is still hovering at a low level, making China's steel exports more cost-effective.

    Read More

  • 28/08/2024

    FEATURE|The Analysis of the Impact of China's New Rebar Standard-GB 1499.2-2024

    On June 25, 2024, China announced the new national standard for rebar -GB 1499.2-2024 (after this referred to as the new national standard) and announced that the policy would be officially implemented on September 25, with a buffer period of 3 months.

    Read More

  • 29/07/2024

    FEATURE| The Knowledge Summary of Seamless, Welded Steel Pipes, Stainless Steel Pipes, and Special-shaped Steel Pipes

    A steel pipe is a steel material with a hollow section whose length is much greater than its diameter or circumference. Steel pipes have the advantages of high strength and durability, and those pipes are easy to cut, weld, and form.

    Read More

  • 28/06/2024

    FEATURE| Analysis of the Difference Between Galvanized Steel Sheet and Galvalume Steel Sheet & Plate

    Galvanized steel sheet & plate and galvalume steel sheet & plate are two common anti-corrosion steel plates widely used in construction, automobiles, home appliances, and other fields. The two products have similarities and differences.

    Read More

  • 04/06/2024

    FEATURE|A New Fashion in the Field of House Construction, Colored Stone Metal Tile

    Stone-coated metal roofing tile not only has the natural, deep, and excellent decorative properties of traditional clay tile but also has the light, strong, and durable performance of modern metal tile. It is the main trend in the development of international advanced roofing materials.

    Read More

  • 30/04/2024

    FEATURE|Comparison of Common Mold Steel Grades in China and Other Countries

    Mold steel is a type of steel used to make molds, such as cold stamping dies, hot forging dies, and die-casting dies. Molds are the main processing tools for manufacturing parts in industrial sectors such as machinery manufacturing, radio instruments, motors, and electrical appliances. Since the production standards of various countries are different, this has caused certain difficulties for customers in international trade. CSMC will organize and display the Chinese grades and other countries' grades to help customers conduct trade more smoothly.

    Read More

Short News
18/07 17:16
< Cold-Rolled Ribbed Steel Rebar, size: Φ10, grade: CRB600H(ASTM A615 Grade 80), brand: QINGYAN. Shanghai - Caoan reduction by --46.67 tons
18/07 17:16
< Ordinary Medium Thick Steel Plate, size: 10, grade: Q235B(ASTM A36 Gr.D), brand: ANSTEEL. Tangshan - Lunan reduction by --38.24 tons
18/07 17:11
< Seamless Steel Pipe, size: Φ180*40, grade: 45#(ASTM 1045), brand: HUITONG. Qingdao - Chengyang increased by 112.80 tons
18/07 17:07
< On July 18, the price of hot rolled steel strip in Anshan rose slightly. 50# (ASTM 1050) Linggang 3.0*580-750mm 522.00, up 1.39. (USD/ton)
Read More
18/07 17:06
< On July 18, the price of carbon structural steel plate in Guangzhou remained stable. 50# (ASTM 1050) Nangang 105-120 (hot rolled) 515.04. (USD/ton)
18/07 17:05
< Seamless Steel Pipe, size: Φ325*9, grade: 45#(ASTM 1045), brand: YANGTERIVER. Liaocheng - Pipe City increased by 31.27 tons

Answers

  • How high a temperature can a prepainted sheet withstand?

    The temperature that a prepainted sheet can withstand varies depending on the coating and substrate.
    Ordinary polyester-coated prepainted sheet can withstand a temperature of 120-150 °C for a short time, and the temperature should not exceed 80 °C for a long time. Excessive temperature will cause the coating to soften, discolor, and age faster.
    Silicon-modified polyester-coated prepainted sheet has good heat resistance and can withstand 150-200 °C for a short time, and the long-term use temperature is around 120 °C.
    Fluorocarbon-coated prepainted sheets have certain high temperature resistance and can withstand a high temperature of about 200 °C for a short time, and the long-term use temperature is around 150 °C.
    The substrate material will also affect the tolerance temperature. If the substrate is a steel plate, it has a higher melting point, but the heat resistance of the coating will limit the overall high temperature resistance.
    In actual use, the frequency and speed of temperature changes must also be considered. Frequent temperature fluctuations will affect the performance of prepainted sheet.


  • Why choose galvanized steel pipe for building construction?

    The bodies of cars and many bicycles are made of galvanized metal. Some drinking water pipes are still made of galvanized steel. Cold rolled sheet metal is also often galvanized. Nuts, bolts, tools and wires of all kinds are now galvanized because it is an inexpensive process and helps to extend the life of the metal!

    In particular, galvanized steel is often used in modern “steel frame” construction. Galvanized steel is also used to build structures such as balconies, verandas, stairs, ladders, walkways, and more. Galvanized metal is ideal if you will be living outdoors after your project is completed. Fences, roofs, outdoor walkways - these are all excellent choices for galvanized metal!

    Wind and Solar Industry - Solar projects must have a continuous workflow once installed, and any repairs/maintenance can lead to service interruptions (also known as loss of revenue). This means that hot-dipped galvanized steel is popular for solar projects because of its corrosion protection. It is also popular for its “environmental” friendliness, as it produces no emissions and ensures no maintenance for decades. It is often used in agriculture, for example, where equipment is susceptible to corrosion, creating a need for stronger, more resilient equipment. The corrosion protection provided by hot-dipped galvanized steel typically lasts for decades, even when exposed to harsh agricultural environments.

    Automotive Industry - Although galvanized bodies were only used in luxury models until the 1980s, their use in automotive manufacturing is now the norm. The “body-in-white” of a car, which makes up about 80% of the body, is made entirely of galvanized steel. The rust resistance of galvanized steel is also a great marketing tool for the automotive industry, as it provides customers with a “rust guarantee”.

    Construction - Whether residential or commercial, the durability of galvanized steel has made it popular in the construction industry for over a century. It has been chosen for its aesthetic appeal; the “sheen” provided by galvanized steel gives it a modern look that is popular in modern architectural design. In addition, it is used not only for large structural elements, but also for fences, gutters, railings, pipes, poles, etc.

    Telecommunications - Telephone lines are not an easy job to maintain, they are tall and often hard to reach. Hot-dip galvanized steel can be used for telephone lines and equipment boxes, thus reducing the risk of damage and the need for maintenance.


  • How to choose high quality 304 stainless steel plate?

    I.clear 304 stainless steel core standards: chemical composition and metallurgical process
    304 stainless steel “high quality” is first reflected in the precise control of its chemical composition. According to international standards (such as ASTM A240/A240M), the typical composition of 304 stainless steel is as follows:
    Chromium (Cr) content: 18%~20%
    Nickel (Ni) content: 8%~10.5%
    Carbon (C) content: ≤0.08%
    Other elements: manganese (Mn) ≤2%, silicon (Si) ≤1%, phosphorus (P) ≤0.045%, sulfur (S) ≤0.03%
    Key points Analysis:
    1, insufficient nickel content is a common trap: nickel is the core element that determines the corrosion resistance and toughness of 304 stainless steel. Some poor quality plates may reduce the cost by reducing the nickel content (such as only 6%~7%), resulting in materials that are prone to rust in a humid or acidic environment. When choosing and selecting need to ask the supplier to provide third-party testing of the spectral analysis report, and focus on checking the proportion of nickel and chromium.
    2, carbon content and corrosion resistance: the lower the carbon content (such as 304L, carbon content ≤ 0.03%), the stronger the resistance to intergranular corrosion. If the product is used for welding processing or high-temperature environment, it is recommended to prioritize the low-carbon version.
    3, the impact of metallurgical process: high-quality 304 stainless steel need to control impurities through the AOD (argon oxygen decarburization) refining process to ensure uniform composition. Small steel mills may use backward smelting technology, resulting in the presence of pores or inclusions within the material.
    II. the surface quality and processing technology: from finish to tolerance control.
    The surface treatment of stainless steel plate directly affects its aesthetics, cleanliness and corrosion resistance. Plates with different processing techniques are suitable for different scenarios:
    Purchasing Precautions:
    Checking surface defects: high-quality plates should be free of scratches, pits, roller marks, color difference. Available strong light lateral irradiation, observe whether the uniform reflection.
    Thickness tolerance control: the actual thickness of 304 stainless steel plate may deviate from the nominal value. For example, the nominal 1.0mm plate, if the ordinary tolerance standard (± 0.1mm), the actual may be between 0.9 ~ 1.1mm; and precision tolerance (such as ± 0.05mm) of the plate is more suitable for processing parts with strict size requirements.
    Edge processing: the shear edge should be flat and burr-free, and the end face of the rolled plate needs to be neat and crack-free.

    III. mechanical properties and corrosion resistance: laboratory testing and practical verification.

    In addition to the composition of the standard, the mechanical properties and corrosion resistance of 304 stainless steel need to be verified through practical testing:

    1, mechanical properties test
    Tensile Strength (Tensile Strength): ≥ 515 MPa
    Yield Strength (Yield Strength): ≥ 205 MPa
    Extension ( Elongation: ≥40% (≥35% when the thickness is ≤0.5mm)
    Test Method: Intercept the sample and send it to the third-party laboratory, and obtain the data through the universal material testing machine.
    2, corrosion resistance verification
    salt spray test: quality 304 plate in 5% neutral salt spray environment should be at least 72 hours without red rust.
    Actual environment simulation: if used in food processing equipment, citric acid or sodium chloride solution can be used to soak for 48 hours to observe whether the surface discoloration.
    Intergranular corrosion test: Through the sulfuric acid - copper sulfate boiling method (GB/T 4334) to detect corrosion resistance after welding or heat treatment.

    IV. Price and cost-effectiveness: avoid the low price trap
    The price of 304 stainless steel plate is greatly affected by the fluctuation of nickel price (nickel accounts for about 50% of the cost), but too low a price is often hidden risks:
    Reasonable price range reference (in 2023, for example):
    1.0mm thickness cold rolled plate: about 18~25 yuan/kg (brand different differences)
    Precision Embossed Plate: mark up of 30%~50%
    Sources of cost differences:
    Proportion of scrap: large mills mostly use virgin material, small mills may be mixed with recycled material.
    Surface treatment process: BA surface costs about 15% more than 2B surface.
    Transportation and storage: The stock environment of regular agents can avoid moisture or contamination of the plate.
    Suggested Strategies:
    Request samples for performance testing before bulk purchase.
    Compare the comprehensive offer of 3 to 5 suppliers, and give priority to businesses that provide testing services.
    V.practical testing techniques: quickly identify poor quality plate.
    Even without professional equipment, you can also use the following methods to initially determine the quality of 304 stainless steel:
    1. magnetic test:
    304 stainless steel is austenitic structure, under normal circumstances non-magnetic (or weakly magnetic). If the plate can be strongly adsorbed by the magnet, it may be counterfeit 200 series stainless steel (such as 201, 202).
    2.potion detection:
    use stainless steel identification fluid (such as Mn, Ni detection fluid):
    drop on the potion, if the rapid red (high manganese and low nickel), it is 201 stainless steel;
    304 stainless steel is usually reddish or colorless (according to the potion formula is different).
    3.spark observation:
    When grinding with a wheel, 304 stainless steel spark is straight and short, spark fork less; and 200 series stainless steel spark is more dense, fork more.
    In summary, selecting high quality 304 stainless steel plate is a job that requires a combination of technology and experience. By strictly controlling the composition, process, testing and supply chain, users can effectively avoid risks and ensure that the material performance meets the needs of long-term use. It is recommended to specify the quality terms in the procurement contract and keep samples for traceability in case of dispute. In the pursuit of cost optimization at the same time, do not ignore the essential performance of the material - after all, a piece of high-quality 304 stainless steel plate, may be ten years of rust-free guarantee, and the hidden loss of poor-quality plate may far exceed the price difference in procurement.


Timely Info Independent Platform Multiple guarantees Self-operated storage

China Steel Market

Empowering small and medium-scale steel purchasing


How can I help you?