The 2011 aluminum alloy is an aluminum-copper based alloy known for its excellent machinability. This alloy contains added bismuth (Bi) which makes it one of the most free-cutting aluminum products available. In terms of its mechanical properties, the T3 state offers great deep-drawing capabilities at lower strengths, while higher strength applications might require the T8 state. The 2011 aluminum alloy exhibits superior workability and high productivity when processed on automatic lathes. Typically, there’s no need for chip breakers during machining. With a machining performance rating of A, this alloy produces very fine chips that have a self-cleaning effect on the cutting surface. Components made from 2011 aluminum are highly valued for their precision and quality.
Applications range widely across industries including hardware components, automotive oil systems, clock parts, gears, pipelines, audio-visual joints, camera parts, instrument axles, military defense equipment, industrial connectors, odometers, potentiometers, timers, and various electronic auxiliary devices like programmer spindles.
**Chemical Composition**
| Element | Content (%) |
|---------|-------------|
| Si | ≤ 0.40 |
| Fe | ≤ 0.70 |
| Cu | 5.0-6.0 |
| Si+Fe | ≤ 0.40 |
| Mg | Trace |
| Pb | 0.2-0.6 |
| Zn | ≤ 0.30 |
| Bi | 0.2-0.6 |
| Other | ≤ 0.15 |
| Al | Remainder |
**Mechanical Properties**
| Property | Value |
|------------------------|------------------|
| Tensile Strength (MPa) | ≥ 310 |
| Yield Strength (MPa) | ≥ 235 |
| Elongation (%) | ≥ 10 |
| Density (g/cm³) | ~ 2.85 |
| Linear Expansion Coef. | ~ 23 × 10â»â¶/°C |
| Thermal Conductivity | ~ 160 W/(m·K) |
| Specific Heat | ~ 900 J/(kg·K) |
This versatile alloy finds extensive use in both industrial and consumer sectors due to its unique combination of properties. Its ability to maintain high standards in both strength and machinability makes it a preferred choice for demanding applications.
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