Tin Bronze C90300 Continuous Cast Bar
C90300 (SAE 620) tin bronze continuous cast unwrought bars with 7.5-9% tin, 3% zinc, 88% copper. Gunmetal alloy for valves and fittings meeting strict bronze criteria. Produced by continuous casting without reduction.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If multi-element alloys not fitting named categories
Catch-all for copper alloys lacking specific base metal predominance per chapter notes.
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Import Tips & Compliance
• Continuous cast products remain unwrought if no size reduction occurs post-casting
• Include heat analysis reports showing batch composition consistency
Related Products under HTS 7403.22.00.00
Phosphor Bronze C51000 Unwrought Ingots
Unwrought phosphor bronze C51000 ingots containing approximately 5% tin and 0.2% phosphorus, classified as copper-tin base alloy under subheading note (b) because tin predominates over other elements. These are used in manufacturing electrical components and springs. Supplied in large cast form for remelting.
Leaded Tin Bronze C93200 Unwrought Bars
Unwrought SAE 660 (C93200) leaded tin bronze bars with 6-8% tin, 6-8% lead, suitable for bearings and bushings. Meets bronze definition as tin predominates over non-copper elements excluding allowable zinc. Cast in simple rectangular form without further working.
Aluminum Bronze C95400 Unwrought Ingots
C95400 aluminum bronze unwrought ingots with 10-11.5% aluminum, 4% iron, but critically 3.5-5% tin where tin predominates over other individual elements per note (b). Used for heavy-duty gears and marine propellers. High-strength casting alloy.
Silicon Bronze C65500 Unwrought Rods
Unwrought silicon bronze C65500 rods containing 3% silicon, 4.8% tin ensuring tin predominance for bronze classification. Corrosion-resistant alloy used in marine hardware and weld rods. Cast sections not mechanically worked.
Naval Bronze C46400 Unwrought Plates
Unwrought naval bronze C46400 cast plates with 39-42% zinc and 5% tin, but tin content controls classification as copper-tin base per note (b) allowance for zinc up to 10% when tin ≥3%. Traditional propeller and valve alloy.
High-Leaded Tin Bronze C93800 Ingots
C93800 high-leaded tin bronze ingots with 10% tin, 20% lead for exceptional machinability in screw machine products. Tin predominance maintains bronze status despite high lead. Used for high-speed machining applications.