Non-Ferrous Metals: Copper, Aluminum and Machinability
AI Summary: Procurement of non-ferrous metals such as copper and aluminum focuses on purity, alloy grade, heat treatment, electrical conductivity, tensile strength, elongation and surface. Aluminum profiles can be formed by extrusion and anodizing, while copper busbars are used for conduction. For batch parts, confirm tooling, straightness, cut length and post-processing allowance.
Procurement Checklist
| Review Item | Selection Point |
|---|---|
| Purity and Alloy | Pure metals and alloys serve different purposes |
| Conductivity and Thermal Conductivity | Check conductivity for electrical parts |
| Profile Precision | Cross-section dimensions and straightness |
| Surface Treatment | Anodizing, electrophoresis or polishing |
| Machining Allowance | Cutting, drilling and finishing |
Procurement, Installation and Usage Points
1. Aluminum Profile Tooling
Complex cross-sections require tooling; confirm cost and lead time.
2. Copper Busbar Connection
Contact surface flatness affects conductivity and heat generation.
3. Anodized Film
Film thickness affects wear resistance and corrosion resistance.
4. Soft vs. Hard Temper
Bending and elasticity requirements differ.
FAQ Quick Answers
Is aluminum alloy less conductive than copper?
Usually lower for the same cross-section, but lighter in weight.
Why do copper busbars generate heat?
Poor contact or insufficient cross-sectional area.
Does anodized aluminum still conduct electricity?
The anodized film is insulating.
Are non-ferrous materials priced by weight or length?
The contract should specify the pricing basis.
Practical Case
The contact surface of a copper busbar in an electrical cabinet was uneven and generated heat during operation. After re-machining it flat and tightening it to the specified torque, the temperature rise returned to normal.
Questions to Ask the Supplier
- Alloy and temper?
- Conductivity and strength?
- Surface film thickness?
- Pricing method?
- Machining precision?
Quotable Conclusion: Non-ferrous metals should be selected by purity, temper and machinability, with emphasis on conductive connections and surface treatment quality.