Chapter 7403 — Customs Tariff Headings

99.99% Pure Copper Cathode Sheets

99.99% pure copper cathode sheets, measuring 1m x 1m, produced via electrolytic refining. They are used directly in continuous casting lines for copper rod production, meeting international electrical conductivity standards. These cathodes are unwrought refined copper, falling under tariff item 7403.11.00.

Codelco Premium Copper Cathodes

Premium electrolytic copper cathodes from Chile, stamped with the 'Codelco Triangle' and meeting Grade A specifications. These are used by global wire and tube manufacturers for high-conductivity applications. They are unwrought refined copper, classified under tariff item 7403.11.00.

Electrolytic Copper Cathode Grade LME A

Electrolytic copper cathodes of Grade LME A, produced via electrowinning, with 99.99% purity and minimal impurities. These are the standard form of refined copper traded on the LME and used as feedstock for various copper products. They are unwrought refined copper, falling under tariff item 7403.11.00.

Electrowon Copper Cathode Sections

Sections cut from large electrolytic copper cathodes, typically 50cm x 50cm, for specialty casting operations. These maintain full cathode purity specifications while allowing smaller lot imports. They are sections of cathodes, classified under tariff item 7403.11.00.

Freeport-McMoRan Copper Cathodes

US-produced electrolytic copper cathodes from Freeport-McMoRan operations, primarily from Arizona mines. These high-quality cathodes feed domestic rod and tube producers. They are unwrought refined copper, classified under tariff item 7403.11.00.

Glencore Copper Cathode Panels

Electrolytic copper cathode panels cut to standard dimensions, ideal for continuous casting and rolling mills. Purity exceeds 99.97% Cu with controlled oxygen content for optimal workability. These are sections of cathodes, classified under tariff item 7403.11.00.

KGHM Polska Miedź Copper Cathodes

Polish electrolytic copper cathodes marked with the KGHM diamond logo, produced to European ETP standards. Widely used in cable manufacturing across North America. These are unwrought refined copper, classified under tariff item 7403.11.00.

Norilsk Nickel Refined Copper Cathodes

Russian-produced electrolytic copper cathodes suitable for electrical applications, typically bundled in 25-ton lots. These cathodes serve as primary input for brass and copper alloy manufacturing worldwide. They are unwrought refined copper, classified under tariff item 7403.11.00.

9999E High Purity Electronic Grade Copper Wire Bar

Ultra-pure 99.99% refined copper wire bar, produced for semiconductor bonding wire manufacturing. As an unwrought refined copper product in wire-bar form, it is classifiable under tariff item 7403.12.00, which covers refined copper wire-bars.

C101 Oxygen-Free Refined Copper Wire Bar

C101 oxygen-free refined copper wire bar, designed for drawing into fine electrical wires. As a high-purity unwrought refined copper product in wire-bar form, it falls under tariff item 7403.12.00.

C102 Deoxidized High Phosphorus Copper Wire Bar

C102 deoxidized high phosphorus copper wire bar, with controlled phosphorus for deoxidation, used in welding wire and high-conductivity applications. It is unwrought refined copper in wire-bar form, classifiable under tariff item 7403.12.00.

C110 Electrolytic Tough Pitch Copper Wire Bar

C110 electrolytic tough pitch copper wire bar, produced via electrolytic refining, offering high conductivity for wire drawing in power cables. As unwrought refined copper in wire-bar form, it is classified under tariff item 7403.12.00.

C120 DHP Free Deoxidized Copper Wire Bar

C120 DHP free deoxidized copper wire bar, with high residual phosphorus, used for plumbing tube and wire production. It is unwrought refined copper in wire-bar form, classifiable under tariff item 7403.12.00.

Continuous Cast Copper Billets for Rod Extrusion

Continuous cast refined copper billets, typically 200-300mm in diameter, are unwrought products of refined copper (at least 99.85% copper by weight) used for hot extrusion into copper rods and subsequent wire drawing. They fall under tariff item 7403.13.00 as billets of refined copper, not yet worked after casting.

Electrolytic Tough Pitch Copper Billets

Electrolytic tough pitch (ETP) copper billets are refined copper (99.9% Cu with controlled oxygen) cast into billet form for wire rod production. As unwrought refined copper in billet form, they are classified under tariff item 7403.13.00, provided they are not subsequently worked.

High Purity Refined Copper Billets

High purity refined copper billets (99.99% Cu) are cylindrical semi-finished products used primarily for extrusion into rods and wires. They are unwrought refined copper in billet form, meeting the definition of refined copper under chapter note 1(a), and are classified under tariff item 7403.13.00.

Oxygen-Free High Conductivity Copper Billets

Oxygen-free high conductivity (OFHC) copper billets feature ultra-low oxygen content (<10 ppm) for superior electrical performance, used for magnet wire. They are refined copper (≥99.95% Cu) in unwrought billet form, classified under tariff item 7403.13.00 as billets of refined copper.

Premium Refined Copper Billets 8-Inch Diameter

Premium refined copper billets of 8-inch (200mm) diameter with a surface free of cracks are used for high-quality rod production in automotive wiring harnesses. These unwrought refined copper billets meet the purity requirements for refined copper and are classified under tariff item 7403.13.00.

C10100 Oxygen-Free Electronic (OFE) Copper Ingots

C10100 Oxygen-Free Electronic (OFE) Copper Ingots are ultra-high purity refined copper ingots with less than 0.0005% oxygen, cast for electronic applications. They are unwrought refined copper, not meeting the highest purity threshold for the 'refined copper' subheading, and are not master alloys. They fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C10200 Oxygen-Free Copper Billets

C10200 Oxygen-Free Copper Billets are refined copper billets with low oxygen content, cast in cylindrical unwrought form for extrusion into tubes or rods. They are unwrought refined copper, not master alloys, and are classified under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C10300 Oxygen-Free Low Phosphorus Copper Slabs

C10300 Oxygen-Free Low Phosphorus Copper Slabs are refined copper slabs with minimal phosphorus and oxygen for superior conductivity applications. They are unwrought refined copper forms other than the highest purity grade, and are not master alloys. They fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C11000 Electrolytic Tough Pitch (ETP) Copper Cathodes

C11000 Electrolytic Tough Pitch (ETP) Copper Cathodes are high-purity refined copper cathodes produced via electrolytic refining, containing at least 99.9% copper with minimal oxygen content. They are unwrought refined copper, not master alloys, and are classified under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C11300 Electrolytic Copper Anode Slabs (Refined Grade)

C11300 Electrolytic Copper Anode Slabs (Refined Grade) are refined copper anode slabs from electrolytic process, with 99.95%+ purity for remelting. They are unwrought refined copper products, not master alloys, and fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C11400 Silver-Bearing Refined Copper Ingots

C11400 Silver-Bearing Refined Copper Ingots are refined copper ingots with 0.04-0.12% silver for improved properties, still classified as refined copper. They are unwrought refined copper containing minor precious metal traces, not master alloys, and fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C11600 Refined Copper Wire Bars

C11600 Refined Copper Wire Bars are semi-circular refined copper wire bars cast for continuous casting into wire rods. They are unwrought refined copper forms, not master alloys, and are classified under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C12000 Domical Phosphorus Copper Slabs

C12000 Domical Phosphorus Copper Slabs are refined copper slabs with 0.004-0.12% phosphorus, 'domical' grade for specific welding uses. They are unwrought refined copper with deoxidant addition, not master alloys, and fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C12200 Phosphorized Copper Cakes

C12200 Phosphorized Copper Cakes are refined copper cakes with trace phosphorus (0.015-0.040%) for deoxidation, in flat unwrought slab form. They are unwrought refined copper, not master alloys, and are classified under tariff item 7403.19.00 as 'Other' unwrought refined copper, used primarily for welding rod production.

C14200 DHP Refined Copper Cakes

C14200 DHP Refined Copper Cakes are deoxidized high phosphorus (DHP) refined copper cakes with 0.015-0.040% P for tubing. They are unwrought refined copper, not master alloys, and fall under tariff item 7403.19.00 as 'Other' unwrought refined copper.

C26000 Cartridge Brass Ingot

C26000 cartridge brass ingot is an unwrought copper-zinc base alloy containing approximately 30% zinc, cast into ingot form for further processing. It meets the definition of copper-zinc base alloys (brass) under tariff item 7403.21.00, as zinc predominates by weight over other elements and the alloy is unwrought.

C35300 High-Leaded Brass Slab

C35300 high-leaded brass slab is an unwrought copper-zinc base alloy with 2-3% lead added for machinability. It qualifies as brass under tariff item 7403.21.00 because zinc predominates by weight over lead and other elements, and the product is in unwrought slab form.

C36000 Free-Cutting Brass Billet

C36000 free-cutting brass billet is an unwrought copper-zinc alloy with added lead for machinability, containing approximately 60% copper and 36% zinc. It falls under tariff item 7403.21.00 as brass since zinc predominates over lead and other elements, and the billet is unwrought.

C37700 Forging Brass Ingot

C37700 forging brass ingot is an unwrought copper-zinc-lead alloy designed for hot forging applications. It is classified as brass under tariff item 7403.21.00 because zinc predominates by weight over lead and other elements, and the product is in ingot form.

C46400 Naval Brass Slab

C46400 naval brass slab is an unwrought copper-zinc-tin alloy with a maximum of 1% tin, maintaining brass classification. It falls under tariff item 7403.21.00 as copper-zinc base alloy because zinc predominates over tin (which is less than 3%), and the slab is unwrought.

C67000 Manganese Brass Billet

C67000 manganese brass billet adds manganese for strength in a copper-zinc base alloy. It meets the definition of brass under tariff item 7403.21.00 because zinc predominates by weight over manganese and other elements, and the billet is unwrought.

C69300 Arsenical Brass Billet

C69300 arsenical brass billet contains small amounts of arsenic for improved corrosion resistance in a copper-zinc matrix. It remains classified as brass under tariff item 7403.21.00 because zinc predominates and other elements are within the limits for brass, and the billet is unwrought.

C69400 Copper-Base Casting Brass Ingot

C69400 casting brass ingot is optimized for sand casting with a copper-zinc-lead-aluminum composition. It is classified as brass under tariff item 7403.21.00 because zinc predominates by weight over lead, aluminum, and other elements, and the ingot is unwrought.

C83600 Commercial 85-5-5-5 Brass Ingot

C83600 commercial 85-5-5-5 brass ingot contains 85% copper, 5% zinc, 5% tin, and 5% lead. It qualifies as brass under tariff item 7403.21.00 because the zinc and tin equivalent maintains brass status, with zinc predominating over tin (which is less than 10% when tin is 3% or more), and the ingot is unwrought.

C87200 Silicon Brass Ingot

C87200 silicon brass ingot incorporates 4% silicon into a copper-zinc matrix for casting applications. It qualifies as brass under tariff item 7403.21.00 because zinc predominates by weight over silicon and other elements, and the ingot is unwrought.

Aluminum Bronze C95400 Unwrought Ingots

Aluminum bronze C95400 unwrought ingots containing 10-11.5% aluminum, 4% iron, and 3.5-5% tin. Although aluminum is present, tin predominates over each other individual element per subheading note (b), classifying this as a copper-tin base alloy. These ingots are used for heavy-duty gears and marine propellers.

High-Leaded Tin Bronze C93800 Ingots

High-leaded tin bronze C93800 ingots with 10% tin and 20% lead for exceptional machinability in screw machine products. Tin predominates over lead and other elements, maintaining bronze classification under subheading note (b). These unwrought ingots are used for high-speed machining applications.

Leaded Tin Bronze C93200 Unwrought Bars

Leaded tin bronze C93200 unwrought bars with 6-8% tin and 6-8% lead, suitable for bearings and bushings. Tin predominates over lead and other non-copper elements, meeting the bronze definition under subheading note (b). These bars are cast in simple shapes and not subsequently worked.

Manganese Bronze C86500 Unwrought Form

Manganese bronze C86500 unwrought castings with 4% tin, 39% zinc, and 3% manganese. Despite high zinc, the tin content ensures bronze classification because tin predominates over each other element except zinc, which is allowed up to 10% when tin is 3% or more. Used for high tensile strength marine castings and gears.

Naval Bronze C46400 Unwrought Plates

Naval bronze C46400 unwrought cast plates with 39-42% zinc and 5% tin. The tin content controls classification as copper-tin base alloy per subheading note (b), which allows zinc up to 10% when tin is 3% or more. These plates are traditional for propellers and valve components.

Phosphor Bronze C51000 Unwrought Ingots

Phosphor bronze C51000 unwrought ingots containing approximately 5% tin and 0.2% phosphorus. Tin predominates over phosphorus and other elements, classifying this as a copper-tin base alloy under subheading note (b). These ingots are used in manufacturing springs, fasteners, and electrical components.

Silicon Bronze C65500 Unwrought Rods

Silicon bronze C65500 unwrought rods containing 3% silicon and 4.8% tin. Tin predominates over silicon, ensuring bronze classification under subheading note (b). These corrosion-resistant rods are used in marine hardware and weld rods, and are cast without mechanical working.

Tin Bronze C90300 Continuous Cast Bar

Tin bronze C90300 continuous cast unwrought bars with 7.5-9% tin, 3% zinc, and 88% copper. This gunmetal alloy meets strict bronze criteria under subheading note (b), with tin predominating over zinc. Produced by continuous casting without subsequent reduction, these bars are used for valves and fittings.

Admiralty Brass Billet

Unwrought copper-zinc alloy billet with 1% tin addition for corrosion resistance in marine applications. As a brass with tin content under 3%, it is classified under 'other copper alloys' in tariff item 7403.29.00.

Aluminum Bronze C95400 Ingot

Aluminum bronze C95400 ingot, containing 85% copper, 11% aluminum, 4% iron, and 3% nickel, in unwrought form. Aluminum predominates over other alloying elements, classifying it as an 'other copper alloy' under tariff item 7403.29.00, distinct from brasses, bronzes, or nickel silvers defined in the subheading notes.

Architectural Bronze C38500 Ingot

Architectural bronze C38500 ingot, an unwrought copper alloy with 57% copper, 41% zinc, and 2% lead, used for ornamental work. Although called 'bronze,' the zinc content exceeds tin, and with tin below 3%, it does not meet the subheading note definition of bronze, thus classifying as an 'other copper alloy' under 7403.29.00.

Architectural Bronze Ingot

Low-tin copper-zinc alloy ingot with less than 3% tin for architectural castings. As a brass rather than a true bronze, it is classified under 'other copper alloys' in tariff item 7403.29.00.

Beryllium Copper C17300 Ingot

Beryllium copper C17300 ingot, an unwrought alloy of 96% copper, 1.9% beryllium, and 0.2% lead, used for high-strength connectors and springs. Beryllium is not one of the elements defining brasses, bronzes, or nickel silvers, so this alloy falls under 'other copper alloys' in tariff item 7403.29.00.

Cartridge Brass Anode

Unwrought 70/30 copper-zinc alloy castings used as anodes in electroplating baths. As a copper-zinc base alloy (brass), it is classified under 'other copper alloys' in tariff item 7403.29.00.

CDA 932 Bearing Bronze Ingot

CDA 932 bearing bronze ingot, an unwrought copper-tin alloy with approximately 83% copper, 7% tin, and 7% zinc. Despite the zinc content exceeding tin, the tin content is 3% or more, and zinc is less than 10%, so it meets the subheading note definition of a copper-tin base alloy (bronze), falling under 'other copper alloys' in 7403.29.00.

Commercial Bronze C22000 Ingot

Commercial bronze C22000 ingot, an unwrought alloy of 90% copper and 10% zinc, used for architectural applications. With zinc as the only significant alloying element and no tin, it does not meet the bronze definition; it is a copper-zinc alloy, but since it is not a master alloy, it falls under 'other copper alloys' in 7403.29.00.

Condenser Tube Alloy Slab

Arsenical copper-zinc alloy slab for heat exchanger tubes, with a small arsenic addition for corrosion resistance. As a copper-zinc base alloy, it is classified under 'other copper alloys' in tariff item 7403.29.00.

Constantan Unwrought Wire Alloy

Unwrought Constantan alloy in wire form, composed of approximately 55% copper and 45% nickel, used for thermocouples and precision resistors. As a copper-nickel base alloy where nickel predominates over other elements, it qualifies as an 'other copper alloy' under tariff item 7403.29.00.

Cupro-Nickel 70/30 Unwrought Anode

Unwrought anodes made of 70% copper and 30% nickel alloy, used in electroplating and cathodic protection systems. As a copper-nickel base alloy with nickel predominating over other elements, it falls under 'other copper alloys' in tariff item 7403.29.00.

Cupro-Nickel 90/10 Unwrought Ingot

Unwrought ingots of 90% copper and 10% nickel alloy, known as cupro-nickel, used for corrosion-resistant marine and desalination equipment. As a copper-nickel base alloy, it is classified under 'other copper alloys' in tariff item 7403.29.00.

Cupronickel C70600 Ingot

Cupronickel C70600 ingot, an unwrought alloy of 88% copper, 10% nickel, 1% iron, and 1% manganese, used for marine condenser tubes and desalination equipment. Nickel content is 5% or more and zinc is absent, so it meets the subheading note definition of a copper-nickel base alloy, falling under 'other copper alloys' in 7403.29.00.