Chapter 72 covers products across the entire steel industry chain, from raw materials to semi-finished products and plates, bars, etc. It includes pig iron, ferroalloys, scrap, steel ingots, and various rolled steel products. This chapter is the most important metal chapter in international trade, involving complex trade measures such as anti-dumping and tariff-rate quotas. Heading 7212 covers cold-rolled flat-rolled products of iron or non-alloy steel of a width less than 600 mm, including flat-rolled products, coated or plated products. Specifically includes cold-rolled but not further worked, tin-plated, zinc-plated, aluminum-plated, painted, etc. Width is the key to distinguishing 7211 (hot-rolled narrow strip) and 7212. First 2 digits 72 = Chapter 72 Iron and steel; digits 3-4 12 = cold-rolled flat-rolled products of iron or non-alloy steel of a width less than 600 mm; digits 5-6 30 = aluminum-plated or aluminum-coated. The complete code 721230 is aluminum-coated carbon steel sheet of a width less than 600 mm. Note: if the width is >= 600 mm, it should be classified under a heading other than 7210 or 7212. The product is aluminum-coated after cold rolling of carbon steel, with a width < 600 mm, which conforms to the description of heading 7212. It is not classified under 7210 (width >= 600 mm) or 7211 (hot-rolled narrow strip). The aluminum coating is applied by hot-dip or electroplating processes, which is different from painting (721240) or zinc plating (721220).

Product name: The standard name of the declared commodity, which should include key information such as material, process, and specifications, such as 'aluminum-coated carbon steel sheet'. Material: The steel grade of the substrate and the coating composition, such as 'non-alloy steel substrate, aluminum coating'. Specifications and dimensions: Thickness, width, length (if it is a sheet), and the width must clearly state whether it is less than 600 mm. Processing technology: Describe the cold rolling and aluminum coating process (hot-dip coating or electroplating), and whether other treatments have been applied. Grade: The steel grade standard, such as Q235, SPCC, etc., to facilitate customs confirmation of classification. Use: Main application fields, such as automotive exhaust systems, home appliance panels, etc. Coating thickness: The thickness or weight of the aluminum coating, in g/m2, which affects classification and anti-dumping. Product name: aluminum-coated carbon steel sheet; Material: non-alloy steel substrate, aluminum coating; Specifications: thickness 1.0 mm, width 500 mm, length 1000 mm; Processing technology: hot-dip aluminum coating after cold rolling; Grade: Q235; Use: heat shield for automotive exhaust system; Coating thickness: 20 g/m2. Width not specified or incorrectly declared as >= 600 mm, resulting in classification under 7210 instead of 7212. Mistakenly declaring aluminum coating as painting or zinc plating, incorrectly classifying under 721240 or 721220. Material mistakenly declared as alloy steel or stainless steel, which should be classified under other headings.

Core basis for classification: 1) The substrate is iron or non-alloy steel; 2) cold-rolled sheet; 3) width less than 600 mm; 4) surface aluminum-plated or aluminum-coated. All four conditions must be met simultaneously. If width >= 600 mm, classify under 7210; if hot-rolled, classify under 7211; if the coating is another metal or paint, classify under other subheadings of 7212. 721220 Zinc-coated carbon steel sheet: The coating is zinc rather than aluminum; other conditions are the same. It can be distinguished by testing the coating composition. 721240 Painted carbon steel sheet: The surface is coated with paint or plastic, not a metal coating. It can be distinguished by visual observation and coating analysis. 721260 Other coated carbon steel sheet: The coating is another metal (such as tin or chromium) or not listed, and the coating material must be confirmed. 721049 Zinc-coated sheet of width >= 600 mm: Width >= 600 mm, and the coating is zinc, classified under 7210. Width is the key distinguishing point. Is the substrate non-alloy steel? Has it been cold-rolled? Is the width less than 600 mm? Is the coating aluminum or aluminum alloy? Are other coatings or paints excluded?

How can I check the import tax rate for 721230? It can be checked through the official website of the General Administration of Customs of China or the International Trade Single Window. Enter HS code 721230, select the country of origin and trade mode, and the system will display the MFN rate, general rate, VAT, and possible anti-dumping duty. Note that tax rates may be adjusted with policy changes, and the latest published rates should prevail. How can aluminum-coated carbon steel sheet and zinc-coated carbon steel sheet be distinguished during customs declaration? Mainly based on the coating composition. Aluminum-coated sheet has a silvery-white surface with the metallic luster of aluminum; zinc-coated sheet has zinc spangle on the surface. Suppliers can be asked to provide material certificates or spectral testing can be conducted. The coating material must be truthfully declared during customs declaration; misdeclaration may lead to classification errors and penalties. Under which code should aluminum-coated carbon steel sheet with a width of exactly 600 mm be classified? According to HS rules, sheet with a width equal to 600 mm should be classified under 7210 (width >= 600 mm), not 7212. Only widths strictly less than 600 mm are classified under 7212. It is recommended to measure accurately and keep records during declaration to avoid disputes. Does 721230 involve anti-dumping measures? Aluminum-coated carbon steel sheet from some countries of origin may involve anti-dumping duties, such as China's measures on grain-oriented silicon steel originating in South Korea, the European Union, etc. Specifically, it is necessary to check announcements from the General Administration of Customs or the trade remedy information website. A certificate of origin must be provided during customs declaration to apply the corresponding tax rate. How should 'processing technology' be filled in among the declaration elements? It should describe in detail the process from substrate to finished product, such as 'hot-dip aluminum coating after cold rolling' or 'electroplating aluminum after cold rolling'. If annealing, temper rolling, etc. have been carried out, they should also be noted. Avoid writing only 'cold-rolled', otherwise the classification may be questioned. For cross-border e-commerce small parcels exporting aluminum-coated carbon steel sheet, is an HS code also required? Yes, all exported goods must declare an HS code. Personal items or low-value goods may have simplified declaration, but a code is still required. It is recommended to use 721230 and truthfully fill in the product name, specifications, etc., to avoid affecting customs clearance. If the thickness of the aluminum coating differs, will it affect the HS code? No, 721230 covers all aluminum coating thicknesses. However, coating thickness may affect anti-dumping duties or tariff-rate quotas. The coating weight (g/m2) should be provided during declaration so that customs can calculate accurately. What is the difference between 721230 and 721250? 721250 is 'other coated or plated carbon steel sheet', including tin-plated, chromium-plated, plastic-coated, etc., while 721230 specifically refers to aluminum-coated. If the coating is aluminum-silicon alloy, it is usually also classified under 721230. It should be determined based on the main composition of the coating.