Copper Additive for Aluminum Alloys
1. High and predictable recovery at a moderate addition temperature of 730 °C or above.
2. Round cake form in a nominal 250 g piece, easy to weigh without cutting.
3. Vacuum or aluminum foil inner packaging protects the metal powder from oxidation in storage.
4. Can be co-added with manganese and iron agents in the same treatment window.
| Feature | Specification |
|---|---|
| Product type | Copper additive for aluminum alloy casting |
| Appearance | Round, cake-shaped, dark red lump |
| Adding temperature | 730 °C or above |
| Inner packaging | Vacuum bag or aluminum foil, 250 g per piece |
| Outer packaging | 500 g per bag, cardboard box, 20 kg per box |
| Shelf life | Eight months; usable directly after opening the box |
| Nominal composition | 75% Cu, balance aluminum powder and flux |
Alloy required Cu content (%) − Alloy original Cu content (%)
Yield rate (95%) × Cu element content in additives (%)× Melt weight
Copper additive is used wherever an aluminum specification calls for copper, from heat-treatable wrought alloys through to general-purpose casting alloys.
1. After the charge is molten, stir evenly and take a sample for analysis to calculate the copper addition required.
2. Once the melt reaches temperature, remove the dross from the surface.
3. Disperse the product into several parts of the molten pool. Manganese and iron agents can be added at the same time.
4. After the reaction is complete, stand 10 minutes and stir thoroughly.
5. Sample for analysis; transfer to the next process once the composition is qualified.
1. 250 g per piece, in vacuum bag or aluminum foil inner packaging.
2. 500 g per bag.
3. Cardboard box, 20 kg per box.
Store in a ventilated, dry place away from moisture. Shelf life is eight months and the product can be used directly after opening the box. Keep bags sealed between draws so the metal powder does not oxidize and the flux does not take up moisture.
