Harmonized System Code Classification

The first two digits of the HS code "73" represent steel products.

Specifically, this chapter covers the following main contents:

• Steel structural components: For example, bridges, buildings, towers, etc.
• Cast iron products: For example, pipes, pipe fittings, radiators, etc.
• Steel products: For example, steel plates, steel pipes, steel wires, steel nails, bolts, nuts, etc.
• Other steel products: For example, springs, chains, fasteners, tools, etc.

Reason for classification:

The establishment of the "73" chapter is to classify and manage various products made primarily of steel. These products typically have the following characteristics:

• Main material is steel: The core component of the product is steel.
• Wide range of applications: Steel products are widely used in construction, machinery, transportation, energy, and other industries.
• Different manufacturing processes and product forms: Steel products can be manufactured through casting, forging, rolling, welding, and other processes, and can present various forms and functions.

Therefore, the first two digits of the HS code "73" are used to identify and classify all products made primarily of steel.

If you can provide a more specific HS code (e.g., 7304, 7310, etc.), I can provide a more detailed classification explanation.

Explanation of the first four digits: 7304: Seamless iron tubes and pipes (excluding cast iron pipes).

Specifically includes:

• Seamless iron tubes
• Seamless steel pipes
• Excludes cast iron pipes

Explanation of the six digits: HS code: 7304.90

Classification: Seamless tubes, pipes, and hollow profiles, of iron (excluding cast iron) or steel: --> Other: --> Wall thickness less than 4 millimeters: --> Alloy steel

Explanation: Refers to seamless tubes, pipes, and hollow profiles of iron (excluding cast iron) or steel, belonging to the "Other" category, and with a wall thickness of less than 4 millimeters made of alloy steel.

Explanation of the 8-10 digits: HS code: 7304903000
Classification: Seamless tubes, pipes, and hollow profiles, of iron (excluding cast iron) or steel --> Other --> Wall thickness 4 millimeters or more --> Alloy steel
Explanation: This HS code belongs to seamless tubes, pipes, and hollow profiles, made of iron or steel (excluding cast iron), with a wall thickness of 4 millimeters or more, and made of alloy steel.

Examples of products: * Alloy steel seamless pipes with a wall thickness of 5 mm * Seamless steel tubes used in high-pressure systems * Alloy steel hollow profiles for structural applications * Seamless steel pipes with a wall thickness of 4 mm or more used in industrial equipment * Alloy steel seamless tubes for automotive or aerospace applications