Copper-Phosphorus Master Alloy 15% P
A master alloy consisting primarily of copper with 15% phosphorus content, used in the non-ferrous metals industry for deoxidizing and grain refining during casting of copper alloys. It falls under HTS 7405.00.60.50 as a master alloy of copper not specified elsewhere in heading 7405. This high-phosphorus variant is essential for improving the fluidity and strength of bronze castings.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied in unwrought form exceeding purity thresholds
Unwrought copper alloys with specific compositions may shift to 7403 if not primarily functioning as master alloys for further alloying.
If chemically defined as a prepared additive for foundry use
Certain prepared chemical additions for metals fall under Chapter 38 if they function more as additives than as base master alloys.
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Import Tips & Compliance
• Provide detailed chemical composition certificates from the manufacturer to verify it qualifies as a copper master alloy under Chapter 74
• Ensure alloy meets subheading note definitions for copper-base alloys; misclassification as unwrought copper (7403) is common
• Declare exact phosphorus percentage on entry documents to avoid reclassification during customs review
Related Products under HTS 7405.00.60.50
CuCrZr Master Alloy Ingots
Master alloy ingots of copper-chromium-zirconium (CuCrZr) designed for addition to copper melts to enhance high-temperature strength and conductivity in electrical applications. Classified under HTS 7405.00.60.50 as other copper master alloys. Commonly used in manufacturing resistance welding electrodes and lead wires.
Master Alloy Cu-10% Beryllium
Copper-beryllium master alloy with 10% beryllium content, supplied in small shot or waffle form for precise additions to copper melts producing beryllium copper alloys. Falls under HTS 7405.00.60.50 as other copper master alloys. Critical for aerospace and electronics components requiring high strength and conductivity.
Cu-Ni Master Alloy 30% Nickel
Copper-nickel master alloy containing 30% nickel, used to adjust nickel content in cupronickel alloys for marine and desalination applications. Classified in HTS 7405.00.60.50 as other copper master alloys. Meets copper-nickel base alloy definition where nickel predominates over other elements.
Copper-Manganese Master Alloy Ingots
Master alloy of copper with 20-30% manganese content, cast into ingots for introducing manganese into copper alloys to improve hot workability and strength. HTS 7405.00.60.50 classification for other copper master alloys. Used in production of free-machining copper alloys.
Cu-Si Master Alloy 10% Silicon
Copper-silicon master alloy with 10% silicon, supplied as cut pieces for bronze foundries to achieve precise silicon bronze compositions. Classified under HTS 7405.00.60.50 as other copper master alloys. Essential for castings requiring corrosion resistance and strength.
Copper-Lead Master Alloy Shot
Small shot form of copper-lead master alloy (5-10% lead) for free-machining alloy production, improving chip breaking during machining. HTS 7405.00.60.50 for other copper master alloys. Widely used in connector and valve manufacturing.