7304.29.61 - Of other alloy steel

This HTS category, 7304.29.61, specifically covers tubing made from "other alloy steel" that is seamless and used in the drilling of oil or gas. Alloy steel, as defined by its inclusion of elements beyond iron and carbon, imparts distinct properties like increased strength, hardness, or corrosion resistance, making it suitable for the demanding conditions encountered in oil and gas extraction.

It is important to differentiate this category from its sibling, 7304.29.50, which pertains to tubing manufactured from iron or non-alloy steel. The presence of alloying elements is the key distinguishing factor, directing products made of these specialized steels into this particular classification.

Within this category, further distinctions are made based on the outside diameter of the tubing. The subcategories provide specific ranges for this physical dimension: tubing with an outside diameter not exceeding 114.3 mm, tubing between 114.3 mm and 215.9 mm, tubing between 215.9 mm and 406.4 mm, and tubing exceeding 406.4 mm. These diameter-based subdivisions allow for more granular classification based on the specific application and size requirements for oil and gas drilling operations.