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2024-11-08 17:34:33.0
< On November 8, the price of tinned steel coil has remained stable in Tianjin. 0.20*950*C mm 659.04 (USD/ton)
2024-11-08 17:34:17.0
< On November 8, the price of color coated corrugated steel sheet has remained stable in Shanghai. YX35-125-750/0.5mm 3.71 (USD/m)
2024-11-08 17:34:04.0
< On November 8, the price of galvanized steel strip has risen by 4.20 in Langfang. 1.5*700 mm 548.59 (USD/ton)
2024-11-08 17:33:50.0
< On November 8, the price of electro-galvanized steel sheet & coil has remained stable in Shanghai. CHANGRUN 0.8*1250*C mm 804.69 (USD/ton)
2024-11-08 17:10:14.0
< On November 8, the price of stainless steel channel in Wenzhou remained stable. 316L Qingshan 16a#(160*63*6.5) 3458.00. (USD/ton)
2024-11-08 17:09:04.0
< On November 8, the price of PC strand wire increased slightly in Guangzhou. 30MnSi Jiujiang Φ8-12 (hot rolling, prestressed) 525.00, up 2.80. (USD/ton)

Answers

  • What is the difference between FBA bulk cargo and full container shipping?

    The bulk cargo in FBA bulk cargo is generally general cargo. If the goods sent by the seller are not full of a box, then it needs to be shipped in LCL with other sellers or other goods (such as books, clothing, daily necessities, etc.).
    It is worth noting that FBA bulk cargo and bulk cargo in LCL are two different concepts, and cannot be confused with bulk cargo and bulk cargo in LCL.
    In fact, the bulk cargo in general sea freight LCL is some goods that cannot fill a whole container alone. And a small amount of goods in this batch will be integrated into the box with the goods of other sellers. After the different goods are combined into a container, they will be packed together, and then the cargo ship will be arranged to send the goods to the destination.
    Therefore, LCL is to classify and pack according to the nature of the goods and the country of destination. Put the goods going to the same destination into a full container and ship them together.

    As the name suggests, full container shipping means that one seller fills the entire container, and then the freight forwarder sends the goods to the destination country. The goods in the container all belong to the same seller, and there are no multiple shippers or multiple types of goods.


  • What is the allowable deviation range of 304 stainless steel plate thickness?


    According to the national standard "Stainless Steel Cold-rolled Sheets and Strips" (GB/T 708-2019), the allowable deviation range of 304 stainless steel plate thickness is as follows:

    1. For plates with a thickness of less than or equal to 4mm, the allowable deviation range is ±0.3mm.
    2. For plates with a thickness greater than 4mm, the allowable deviation range is ±0.5%.


  • What are the factors that cause stainless steel to rust?

    1. Chloride ion environment.
    Chloride ions mainly exist in purified liquids and gases. Chloride ions will react with chromium ions in stainless steel, destroy the dense oxide film of stainless steel, and cause stainless steel to rust, thereby accelerating the corrosion of stainless steel, and even exceeding that of ordinary low-carbon steel.
    2. Electrochemical corrosion.
    When the surface of stainless steel is in contact with other metals for a long time, a primary battery will be formed in a humid environment, destroying the chromium oxide film and aggravating the rust of stainless steel.
    3. Chromium does not meet the standard.
    Chromium has a huge impact on the rust resistance of stainless steel. As the proportion of chromium increases, the steel is less likely to rust. Taking 304 stainless steel as an example, when the chromium content reaches 18%, its corrosion resistance suddenly changes, and the best corrosion resistance effect is obtained.
    4. Surface scratches.
    From a chemical point of view, the most unstable place is most likely to undergo chemical reactions. Surface scratches may also cause damage to the surface dynamic membrane. The scratched place becomes the most unstable place for stainless steel. Oxygen and water will enter the interior of the stainless steel and rust.
    5. Mechanical stress.
    When stainless steel is made into products, we need to go through processes such as stamping, shearing, punching, stretching, grinding, hot cutting, or welding. At this time, other metal elements, dust, or metal particles will be attached to the surface of the stainless steel, and they will produce chemical reactions when encountering chloride ions and sulfur ions in the air, thereby destroying the corrosion resistance of the stainless steel itself and accelerating the rusting process of the stainless steel.
    6. Others.
    The influence of organic acids, the influence of sulfides, etc., will destroy the passivation film of stainless steel.


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