Copper-Boron Master Alloy
Master alloy of copper containing 4-8% boron, designed for grain refinement in copper casting alloys like bronzes. Classified under HTS 7405.00.60 as other copper master alloys, it provides controlled boron addition to enhance mechanical properties. Primarily used by foundries for high-strength castings.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If processed into bars/rods of copper-zinc base alloys (brasses)
If the alloy meets brass composition per subheading note (a), it shifts to Chapter 74 heading 7407 for specific forms.
If for high-purity copper with trace boron (<0.6%)
Refined copper cathodes/anodes with minimal impurities fall under 7403, excluding master alloy function.
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Import Tips & Compliance
• Submit assay reports confirming boron content and copper matrix to distinguish from commodity copper alloys
• Declare as 'master alloy for foundry use' on commercial invoice to prevent confusion with finished copper products
• Watch for valuation issues; master alloys command premium pricing over base copper
Related Products under HTS 7405.00.60
Copper-Titanium Master Alloy
High-titanium (5-10%) copper master alloy for strengthening copper alloys through precipitation hardening. Falls under HTS 7405.00.60 as other copper master alloys for industrial alloying. Used in electrical and structural copper products.
Copper-Cerium Master Alloy
Copper master alloy with 10-20% cerium (rare earth) for modifying microstructure in copper castings. HTS 7405.00.60 includes these as other copper master alloys used in specialty foundry applications. Improves casting quality and surface finish.
Copper-Vanadium Master Alloy
5-10% vanadium in copper master alloy for improving strength and recrystallization resistance. HTS 7405.00.60 classification as other copper master alloys for specialty alloy production. Used in resistance welding electrodes.
Copper-Phosphorus Master Alloy
A master alloy consisting primarily of copper with high phosphorus content (typically 10-15%) used in the non-ferrous metals industry to introduce phosphorus into brasses and bronzes. It falls under HTS 7405.00.60 as a master alloy of copper, classified as 'other' master alloys not specifically enumerated. This alloy aids in deoxidizing and improving fluidity during casting.
Copper-Manganese Master Alloy
Copper-based master alloy with 20-30% manganese content for alloying in aluminum bronzes and brasses. HTS 7405.00.60 covers this as other master alloys of copper used in metallurgical processes. It ensures uniform manganese distribution in final cast products.
Copper-Chromium Master Alloy
Master alloy containing 8-12% chromium in copper matrix for heat-resistant copper alloys. Classified under HTS 7405.00.60 as other master alloys of copper. Essential for applications requiring high temperature strength like welding electrodes.