CHAPTER 72 · LEGAL NOTES
Chapter 72
The 334 legal notes below govern classification under Chapter 72. They are part of the official Harmonized Tariff Schedule and are cited verbatim in CBP rulings.
As of June 9, 2026
Chapter notes
Note 1
Chapter Note 1: In this chapter and, in the case of notes (d), (e) and (f) below throughout the tariff schedule, the following expressions have the meanings hereby assigned to them: (a) Pig iron Iron-carbon alloys not usefully malleable, containing more than 2 percent by weight of carbon and which may contain by weight one or more other elements within the following limits: - not more than 10 percent of chromium - not more than 6 percent of manganese - not more than 3 percent of phosphorus - not more than 8 percent of silicon - a total of not more than 10 percent of other elements. (b) Spiegeleisen Iron-carbon alloys containing by weight more than 6 percent but not more than 30 percent of manganese and otherwise conforming to the specification at (a) above.
Note 2
Chapter Note 2: Ferrous metals clad with another ferrous metal are to be classified as products of the ferrous metal predominating by weight.
Note 3
Chapter Note 3: Iron or steel products obtained by electrolytic deposition, by pressure casting or by sintering are to be classified according to their form, their composition and their appearance, in the headings of this chapter appropriate to similar hot-rolled products.
Additional U.S. notes
Note 1
Additional U.S. Note 1: For the purposes of the tariff schedule the following expressions have the meanings hereby assigned to them: (a) High-strength steel Flat-rolled products of a thickness of less than 3 mm and having a minimum yield point of 275 MPa or of a thickness of 3 mm or more and having a minimum yield point of 355 MPa.
Note 2
Additional U.S. Note 2: For the purposes of this chapter, unless the context provides otherwise, the term "further worked" refers to products subjected to any of the following surface treatments: polishing and burnishing; artificial oxidation; chemical surface treatments such as phosphatizing, oxalating and borating; coating with metal; coating with nonmetallic substances (e.g., enameling, varnishing, lacquering, painting, coating with plastics materials); or cladding.
Note 3
Additional U.S. Note 3: No allowance or reduction of duties for partial damage or loss in consequence of discoloration or rust occurring before entry shall be made upon iron or steel or upon any article of iron or steel.
Statistical notes
Note 0
Statistical Note 0: 04 percent phosphorus, suitable for drawing or rolling to final size for use as: (i) an uncoated or plated or copper coated solid welding wire or rod; (ii) the core wire or core rod for covered shielded metal arc (“SMAW”) welding electrode, or (iii) the formed jacket of a flux cored welding electrode that is suitable for consumption in the electric arc welding process.
Note 1
Statistical Note 1: For the purposes of the tariff schedule, the expression high-nickel alloy steel refers to alloy steel containing by weight 24 percent or more of nickel, with or without other elements.
Note 2
Statistical Note 2: For the purposes of subheading 7204.10, waste and scrap of cast iron includes but is not necessarily limited to: cupola cast (ISRI number 252); charging box cast (ISRI number 253); heavy breakable cast (ISRI number 254); hammer blocks or bases (ISRI number 255); burnt iron (ISRI number 256); mixed cast (ISRI number 257); stove plate, clean cast iron stove (ISRI number 258); clean auto cast (ISRI numbers 259, 262 and 263); motor blocks (ISRI number 260); drop broken machinery cast (ISRI number 261); malleable (ISRI number 264); ingot molds and stools (ISRI numbers 265 and 266); and railroad ferrous scrap consisting of cast iron No. 1, No. 2, No. 3 and No. 4, cast iron brake shoes and No. 1 wheels.
Note 3
Statistical Note 3: For the purposes of subheading 7204.41 or 7204.49 the expression: (a) No. 1 heavy melting includes, but is not necessarily limited to: No. 1 heavy melting steel (ISRI numbers 200, 201 and 202); bundled No. 1 steel (ISRI number 217); cast steel (ISRI number 233); springs and crankshafts (ISRI number 244); ship scrap; and railroad ferrous scrap consisting of cast steel No. 1 and No. 2, railroad No. 1 melting steel, spring steel, destroyed steel cars, destroyed steel car sides and box car roofs (note: other types of railroad ferrous scrap are included in some of the grades listed below); (b) No. 2 heavy melting includes, but is not necessarily limited to: No. 2 heavy melting steel (ISRI numbers 203, 204, 205 and 206); bundled No. 2 steel (ISRI number 218); foundry steel (ISRI numbers 242 and 243); and hard steel cut 76 cm and under (ISRI number 248); (c) No. 1 bundles includes, but is not necessarily limited to: No.
Note 4
Statistical Note 4: (a) “Advanced” high strength steel refers to flat-rolled products of a thickness of less than 3 mm that meet the definition of high-strength steel in Additional U.S. Note 1(a) to chapter 72 and have a minimum tensile strength of 590 MPa or more but less than 980 MPa. “Ultra” high-strength steel refers to flat-rolled products of a thickness of less than 3 mm that meet the definition of high-strength steel in Additional U.S. Note 1(a) to chapter 72 and have a minimum tensile strength of 980 MPa or more. (b) "Other” high-strength steel refers to flat-rolled products of a thickness of less than 3 mm that meet the definition of high-strength steel in Additional U.S. Note 1(a) to chapter 72 and have a minimum tensile strength of less than 590 MPa.
Note 5
Statistical Note 5: Tire cord-quality steel wire rod Rod measuring 5.0 mm or more but not more than 6.0 mm in cross-sectional diameter, with an average partial decarburization of no more than 70 micrometers in depth (maximum 200 micrometers); having no non-deformable inclusions with a thickness (measured perpendicular to the rolling direction) greater than 20 micrometers; and, containing by weight the following elements in proportions: – 0.68 percent or more carbon, – less than 0.01 percent of aluminum, – 0.040 percent or less, in aggregate, of phosphorus and sulfur, – 0.008 percent or less of nitrogen, and – not more than 0.55 percent, in the aggregate, of copper, nickel and chromium.
Note 6
Statistical Note 6: Cold Heading Quality (CHQ) Rod suitable for cold heading, forging, or thread rolling, and meeting standard ASTM F2282.
Note 7
Statistical Note 7: Welding quality wire rod Rod measuring less than 10 mm in diameter having less than 0.2 percent carbon, less than 0.04 percent sulfur, and less than
Note 8
Statistical Note 8: Spring round wire For the purposes of statistical reporting number 7223.00.1005, the term “spring round wire” means wire suitable for the manufacture of springs and meeting ASTM standard A313. Unit Rates of Duty of Quantity Article Description Stat. Suffix Heading/ Subheading 1 2 General Special I. PRIMARY MATERIALS; PRODUCTS IN GRANULAR OR POWDER FORM 7201 Pig iron and spiegeleisen in pigs, blocks or other primary forms: Nonalloy pig iron containing by weight 0.5 percent or less
Subheading notes
Note 1
Subheading Note 1: In this chapter the following expressions have the meanings hereby assigned to them:
Note 2
Subheading Note 2: For the classification of ferroalloys in the subheadings of heading 7202 the following rule should be observed: A ferroalloy is considered as binary and classified under the relevant subheading (if it exists) if only one of the alloy elements exceeds the minimum percentage laid down in chapter note 1(c); by analogy, it is considered respectively as ternary or quaternary if two or three alloy elements exceed the minimum percentage. For the application of this rule, the unspecified "other elements" referred to in chapter note 1(c) must each exceed 10 percent by weight.
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Classify under Chapter 72 with confidence
TariffLens applies the legal notes above automatically when classifying — citing the relevant note in every GRI reasoning chain.