Chapter 73 covers articles of iron or steel, including pipe fittings, structures, containers, springs, chains, nails, bolts, etc. This chapter has a broad scope, ranging from simple castings to complex processed products, but excludes electromechanical products (Chapters 84/85) and vehicle parts (Chapter 87). Springs, as basic mechanical components, are classified in this chapter due to their general-purpose nature, rather than as parts of specific machines. Heading 7320 covers springs and leaves for springs, of iron or steel, including helical springs, leaf springs, torsion bar springs, etc., whether or not heat-treated or surface-treated. However, it excludes clock or watch springs (9114), leaf springs for vehicle suspension (7320.10), and certain specialized springs (such as machine parts of Chapter 84). This heading is subdivided by type and use. The first 2 digits '73' represent Chapter 73 'Articles of iron or steel', covering all finished products of iron or steel, but excluding primary materials of Chapter 72. The 3rd-4th digits '20' represent heading '7320', i.e., 'Springs and leaves for springs, of iron or steel', distinguished from other iron or steel articles such as chains (7315) or fasteners (7318). The 5th-6th digits '90' are subheading 'Other springs', indicating all springs other than specific types such as helical springs (7320.10), leaf springs (7320.20), etc., such as disc springs, scroll springs, special-shaped springs, etc. This subheading is a residual item, covering springs not elsewhere specified. The goods are springs of iron or steel, and do not fall under listed subheadings such as helical springs or leaf springs, so they are classified under 7320.90 'Other springs'. If they were copper springs, they would be classified under 7419; if they were leaf springs for vehicle suspension, under 7320.10; if they were clock or watch springs, under 9114. Therefore, being made of iron or steel and not being a specific type is the key to classification under this code.

Product name: The standard name of the declared commodity should be specific, such as 'stainless steel disc spring', 'scroll spring', etc., avoiding the generic term 'spring'. Material: Indicate the iron or steel material of the spring, such as 'stainless steel', 'carbon steel', 'alloy steel', etc., and provide the grade if necessary. Use: Explain the usage scenario of the spring, such as 'for automobile clutches', 'for industrial valves', etc., to help determine whether it is a specialized part. Type: Specific spring type, such as 'disc', 'scroll', 'torsion bar', 'special-shaped', etc., to confirm the subheading. Dimensions: Main dimensional parameters of the spring, such as wire diameter, outer diameter, free length, etc., to facilitate customs confirmation of product characteristics. Brand: If there is a brand, declare the brand name; if no brand, indicate 'no brand'. Model: Declare the product's model or part number for identification and traceability. Product name: Stainless steel disc spring; Material: Stainless steel (grade 304); Use: For industrial valve sealing; Type: Disc; Dimensions: Outer diameter 50mm, inner diameter 25mm, thickness 3mm; Brand: No brand; Model: DS-50. Mistaking helical springs for 7320.90, when they should actually be classified under 7320.10. Declaring the material as 'iron' instead of 'steel', which may lead to classification under a heading other than 7320. Filling in the use as 'general' without specifying the machine; if it is a specialized part, it may need to be classified under Chapter 84. Ignoring brand and model declaration, affecting customs valuation and intellectual property verification.

The core basis for classification is the 'Import and Export Tariff' and its notes. First confirm the material is iron or steel (Chapter 73), then confirm it is a spring (7320), and finally, based on type, exclude listed subheadings (such as helical springs, leaf springs) and classify under 'Other springs'. If the spring is a leaf spring for vehicle suspension, classify under 7320.10; if it is a clock or watch spring, under 9114; if it is a specialized machine part, it may be classified according to the machine (Chapter 84). 732010 Leaf springs and leaves for springs: 732010 specifically refers to leaf springs and leaves for springs of iron or steel, usually used for vehicle suspension; 732090 is for other types of springs, such as disc, scroll, etc. The key difference is whether the structure is flat and leaf-like. 732020 Helical springs: 732020 covers helical springs (including tension, compression, torsion helical springs), while 732090 excludes helical springs. If the spring is helical, it should be classified under 732020. 741999 Other articles of copper: If the spring material is copper or copper alloy, it should be classified under Chapter 74, not 732090. Material is the primary distinguishing point. 848790 Machine parts: If the spring is a specialized part of a specific machine and meets the notes to Chapter 84, it may be classified under Chapter 84. However, general-purpose springs remain under 7320. It is necessary to determine whether it is specialized. 911490 Clock or watch springs: Clock or watch springs (including springs) are classified under 9114, not 7320. The use for clocks or watches is the decisive factor. Is the material iron or steel? Is it a spring? Is it a helical spring or leaf spring? Is it used for vehicle suspension? Is it exclusively for machines of Chapter 84?

What is the difference between 732090 and 732020? 732020 is for helical springs, including compression, tension, and torsion helical springs; 732090 is for other springs, such as disc springs, scroll springs, special-shaped springs, etc. If your spring is helical in shape, it should be classified under 732020; otherwise, under 732090. Are stainless steel springs classified under 732090? Yes, as long as they are made of stainless steel and are not helical springs or leaf springs, they are classified under 732090. Stainless steel is a type of steel, so it remains in Chapter 73. However, if they are copper springs, they should be classified under Chapter 74. Which code are springs for automobile suspension classified under? Leaf springs for automobile suspension are classified under 732010; helical springs under 732020. If they are other types of suspension springs, they may be classified under 732090. However, note that if they are specialized vehicle parts and meet the notes to Chapter 87, they may also be classified under Chapter 87. How can I check the tariff rate for 732090? The tariff rate depends on the destination country and country of origin. It can be checked through the official website of the General Administration of Customs of China, the WTO tariff database, or by consulting a customs broker. Note that rates may change, and the latest tariff schedule shall prevail. Is the use of the spring important when declaring? Very important. The use helps determine whether it is a specialized part. If it is exclusively for a machine of Chapter 84, it may be classified under Chapter 84 rather than 7320. Therefore, when declaring, the specific use should be filled in detail, such as 'for XX machine'. Are disc springs classified under 732090? Yes, disc springs are not helical springs or leaf springs, so they are classified under 732090. When declaring, indicate 'disc' to distinguish them. What should be noted when declaring the material of springs? The material should be accurately declared, such as 'stainless steel', 'carbon steel', 'alloy steel', etc. Avoid writing 'steel' generically, because different materials may affect classification (e.g., stainless steel and other steels are distinguished in some tariff codes). If a spring is a specialized machine part, can it still be classified under 732090? Not necessarily. If the spring is a specialized part of a certain machine, and that machine is classified under Chapter 84, the spring may be classified as a machine part (e.g., 848790). However, general-purpose springs remain under 7320. It needs to be determined based on the notes to Section XVI and the specific machine.