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Send EmailCobalt-Copper Master Alloy, 7440-48-4, 7440-50-8, 12506-85-3
| Parameter | Value |
|---|---|
| Product Name | Cobalt-Copper Master Alloy |
| Alloy Code | CuCo10, 10Co |
| CAS Number (Alloy) | 12506-85-3 (Cobalt, compd. with copper (1:1)) |
| EC / EINECS Number | Not applicable (n/a) |
| Chemical Formula | CoCu |
| Molecular Weight | ~122.48 g/mol |
| Nominal Composition | 10% Cobalt, 90% Copper (by weight) |
| Impurity Limit | Total impurities < 0.3% (Fe, Ni, P, Pb, Sn, etc.) |
| Form | Solid ingot / granule / fine chip |
| Appearance | Metallic, copper-red, uniform structure |
| Standard | EN 1981:2003 – Copper and copper alloys. Master alloys |
Component CAS Numbers:
| Component | Content | CAS Number | EC Number |
|---|---|---|---|
| Cobalt (Co) | 10% | 7440-48-4 | 231-158-0 |
| Copper (Cu) | 90% | 7440-50-8 | 231-159-6 |
| Property | Value | Unit |
|---|---|---|
| Liquidus | 1480 | °C |
| Liquidus (Kelvin) | 1753 | K |
| Solidus | 1460 | °C |
| Solidus (Kelvin) | 1733 | K |
| Melting Range | 20 | °C (very narrow) |
| Density (20°C) | ~8.9 | g/cm³ |
| Electrical Conductivity | ~25-30 | % IACS |
| Thermal Conductivity | ~200 | W/m·K |
| Brinell Hardness (HB) | ~80-110 | - |
Note: The narrow melting range (20°C) is ideal for precise alloying and controlled solidification.
Production method: Vacuum induction or protective atmosphere melting + continuous casting.
Grain structure: Fine-grained, evenly distributed cobalt particles.
Homogeneity: Segregation < 2%, superior to standard master alloys.
High-strength copper alloys (e.g., CuCrZrCo – chromium, zirconium, cobalt addition).
Automotive connectors and terminals requiring spring force.
Pantograph wires – high wear and arc resistance with good conductivity.
Welding electrodes – cobalt addition to copper-zirconium improves softening resistance.
Resistance welding tips and holders.
Rolling mill guides, furnace conveyor chains.
Mold materials for metal injection molding (MIM).
Powder metallurgy composite materials – matrix reinforcement.
Laser cladding for wear resistance improvement.
| Method | Process Steps | Temperature (°C) | Notes |
|---|---|---|---|
| Addition to melt | Add 2-10% CuCo10 to molten base alloy | 1480-1550 | Stirring required |
| Powder metallurgy | Mix granules with Cu powder + sintering | 900-1050 | Protective atmosphere |
| Pre-casting modification | Add 5 min before pouring | 1450-1480 | Grain refiner effect |
Recommended dosage: Final cobalt content typically 0.5–5% depending on application. Using 10Co master alloy:
Example: To achieve 2.5% Co in final alloy, add 25% CuCo10 by weight to the melt.
| Alloy | Advantages | Disadvantages | Substitute? |
|---|---|---|---|
| CuCo10 (this product) | High homogeneity, narrow melting range, good conductivity | Cobalt price volatility | – |
| CuNi10 | Lower cost, good corrosion resistance | Lower high‑temperature strength | Partly (if no high‑temp requirement) |
| CuFe10 | Very cheap, magnetic | Poor electrical conductivity | No (conductivity loss) |
| CuCr1Zr | High conductivity, good strength | Zirconium oxidation sensitive | Yes (if wear resistance not critical) |
| CuBe2 | Very high strength, fatigue resistant | Toxic, expensive | No (toxic alternative) |
When to choose CuCo10?
High-temperature softening resistance required
Arc erosion resistant electrical contacts
Non-beryllium alternative needed
Homogeneous cobalt distribution – minimal local hardness variation.
Narrow liquidus‑solidus range (20°C) – prevents grain boundary segregation.
Low oxide content – due to protective atmosphere production.
Recyclable – scrap can be remelted.
| Condition | Recommendation |
|---|---|
| Temperature | 5 – 40 °C |
| Humidity | Below 50%, preferably with desiccant |
| Shelf life | Unlimited (if unoxidized) |
| Transport | Palletised, impact‑protective foam or wooden case |
| Avoid | Acids, salts, alkalis, strong oxidizers |
Hazard classification: Metal alloy – not classified as dangerous under ADR 2019.
Personal protective equipment (PPE):
– Dust mask (when cutting or generating chips)
– Safety goggles
– Nitrile gloves + welding apron for melting/welding
First aid:
– Inhalation: Move to fresh air. Administer oxygen if breathing difficulty.
– Ingestion: Do not induce vomiting. Rinse mouth, seek medical attention.
– Skin contact: Wash with soap and water; remove contaminated clothing.
Waste disposal: Send to licensed metal recycler. Do not discard into soil or water.
| Type | Weight | Material |
|---|---|---|
| Ingot (standard) | 5 – 10 kg | Plastic‑lined strapped foam tray |
| Granule | 25 kg kraft bag + PE inner liner | UN certified nylon bag |
| Custom order | Upon request (100 – 1000 kg) | Wooden crated, palletised |
| Test | Method | Acceptance Criteria |
|---|---|---|
| Chemical analysis | ICP‑OES | Co: 9.8 – 10.2% |
| Impurity analysis | ICP‑OES | Fe ≤0.1%; Ni ≤0.2%; P ≤0.05%; Pb ≤0.05%; Sn ≤0.05%; total ≤0.3% |
| Oxygen content | Fusion analysis | < 200 ppm |
| Grain size | ASTM E112 | Avg. grain diameter < 50 µm |
| Hardness | Brinell HB 2.5/62.5 | 80 – 110 HB |
| Density | Archimedes | 8.85 – 8.95 g/cm³ |
| Component | CAS No. | RTECS No. | UN No. (powder form) |
|---|---|---|---|
| Cobalt metal | 7440-48-4 | GF8750000 | 3089 (flammable solid, Class 4.1) |
| Copper metal | 7440-50-8 | GL5325000 | – |
Manufacturer / Supplier:
Betakim Tekstil
(Metallurgy division – Master alloys)
Note: Technical data are typical values and may vary slightly between production batches. Pre‑testing for specific applications is recommended.
| Substance | CAS Number |
|---|---|
| CuCo10 alloy | 12506-85-3 |
| Cobalt (Co) | 7440-48-4 |
| Copper (Cu) | 7440-50-8 |