Harmonized System Code Classification

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

Specifically, this chapter includes 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, cutting 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 appear in 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: HS code: 7305

Classification description: Other tubes and profiles (e.g., welded, riveted or similarly closed), with a circular cross-section, with an external diameter exceeding 406.4 millimeters, of iron or steel tubes and profiles.

Specific meaning: This code covers iron or steel tubes and profiles with a circular cross-section and an external diameter greater than 406.4 millimeters, which are closed by welding, riveting, or similar methods.

Explanation of the six digits: HS code: 7305.20

Classification: Other tubes and profiles (e.g., welded, riveted or similarly closed), with a circular cross-section, with an external diameter exceeding 406.4 millimeters, of iron or steel tubes: --> for use in oil or gas drilling: --> made of alloy steel: --> other

Meaning: This HS code refers to iron or steel tubes with an external diameter greater than 406.4 millimeters, particularly those used for oil or gas drilling, and are made of alloy steel, other types.

Explanation of the 8–10 digits: HS code: 7305204000
Classification: Other tubes and profiles (e.g., welded, riveted or similarly closed), with a circular cross-section, with an external diameter exceeding 406.4 millimeters, of iron or steel tubes and profiles: --> for use in oil or gas drilling: --> tubes of iron or non-alloy steel: --> other
Explanation: This HS code belongs to iron or steel tubes and profiles with a circular cross-section and an external diameter exceeding 406.4 millimeters, specifically used for oil or gas drilling tubes, and are other types made of iron or non-alloy steel.

Product examples: * Steel pipe for oil drilling * Alloy steel casing for gas well * Non-alloy steel casing for deep well drilling * Large diameter steel tubes for industrial applications * Steel profiles used in oil and gas infrastructure