Aluminum AlloyBar/Rod
Overview
2011 is a free-machining aluminum alloy of the Al-Cu-Pb-Bi system, designed specifically for high-speed machining operations. The addition of lead (0.2–0.6%) and bismuth (0.2–0.6%) produces short, easily broken chips, enabling high material removal rates and excellent surface finish. It has moderate to high strength but relatively poor corrosion resistance compared to other 2000-series alloys. It is commonly available as cold-finished or extruded rod, tube, and wire.
Size Range
- 3–100 mm
- 8–200 mm
Grade Specification
| System | Value |
|---|---|
| AA 2011 | - |
| A92011 | - |
| AlCu6BiPb | - |
| EN AW-2011 | - |
| 2011 | - |
| 3.1255 | - |
| A2011 | - |
Chemical Composition
| Element | Value |
|---|---|
| Si | ≤0.40 |
| Fe | ≤0.50 |
| Cu | 5.0–6.0 |
| Pb | 0.2–0.6 |
| Bi | 0.2–0.6 |
| Zn | ≤0.30 |
| Si+Fe | ≤0.40 |
| Others (each) | ≤0.05 |
| Others (total) | ≤0.15 |
| Al | Remainder |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥380 |
| Yield Strength (MPa) | ≥295 |
| Elongation (%) | ≥15 |
| Hardness (HB) | ~95 |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density | - | 2.82 g/cm³ |
| Melting range | - | 540–640°C |
| Elastic modulus | - | ~71 GPa |
| Thermal expansion (20–100°C) | - | 23.0 × 10⁻⁶ /K |
| Thermal conductivity (T6) | - | ~152 W/(m·K) |
| Electrical resistivity (T6) | - | ~0.040 μΩ·m |
| Electrical conductivity (T6) | - | ~40% IACS |
Applications
- Precision-machined components: bolts, screws, nuts, threaded fasteners
- Automotive parts: engine components, transmission parts, fittings
- Electronic and electrical components: connectors, terminals, housings
- Swiss-type lathe and CNC machined parts requiring high throughput
- Valve bodies, bushings, and collets
- Camera and optical instrument parts