Copper-tin base alloys (bronze)
Railway or tramway track construction material of iron or steel, the following: rails, check-rails and rack rails, switch blades, crossing frogs, point rods and other crossing pieces, sleepers (cross-ties), fish-plates, chairs, chair wedges, sole plates (base plates), rail clips, bedplates, ties and other material specialized for jointing or fixing rails. > Copper alloys: > Copper-tin base alloys (bronze) > Copper-tin base alloys (bronze)
Duty Rate (from China)
Products classified under Tariff item 7403.22.00
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 in higher proportion than tin, the alloy is classified as a copper-tin base alloy because tin predominates over each of the other elements individually, per the subheading note. 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, used for screw machine products requiring exceptional machinability. Despite the high lead content, tin predominates over lead and other elements, maintaining classification as a copper-tin base alloy under subheading note (b).
Leaded Tin Bronze C93200 Unwrought Bars
Leaded tin bronze C93200 unwrought bars, also known as SAE 660, containing 6-8% tin and 6-8% lead, used for bearings and bushings. The tin content ensures classification as a copper-tin base alloy, as tin predominates over lead and other elements, per the subheading note.
Manganese Bronze C86500 Unwrought Form
Manganese bronze C86500 unwrought castings with 4% tin, 39% zinc, and 3% manganese, used for high-tensile marine castings and gears. Although zinc is present in higher proportion, the alloy is classified as copper-tin base because tin predominates over each other element individually, and the zinc content exceeds 10% but the tin content is 3% or more, allowing this exception under the subheading note.
Naval Bronze C46400 Unwrought Plates
Naval bronze C46400 unwrought plates with 39-42% zinc and 5% tin, used for traditional propeller and valve applications. The tin content of 5% (≥3%) allows the zinc content to exceed tin, but the alloy remains a copper-tin base alloy because tin predominates over each other element individually, per the subheading note.
Phosphor Bronze C51000 Unwrought Ingots
Phosphor bronze C51000 unwrought ingots containing approximately 5% tin and 0.2% phosphorus, used in electrical and spring applications. The tin content predominates over phosphorus and other elements, classifying the alloy as a copper-tin base alloy under subheading note (b).
Silicon Bronze C65500 Unwrought Rods
Silicon bronze C65500 unwrought rods containing 3% silicon and 4.8% tin, used for marine hardware and weld rods. The tin content predominates over silicon, classifying the alloy as a copper-tin base alloy under subheading note (b). The rods are cast sections not mechanically worked.
Tin Bronze C90300 Continuous Cast Bar
Tin bronze C90300 continuous cast unwrought bars, also known as SAE 620, with 7.5-9% tin, 3% zinc, and 88% copper, used for valves and fittings. The tin content predominates over zinc and other elements, classifying the alloy as a copper-tin base alloy under subheading note (b). Produced by continuous casting without further reduction.