The 2011 aluminum alloy is a type of aluminum-copper alloy that stands out due to its excellent machinability. It contains bismuth, which makes it one of the most free-cutting alloys available in the market. When considering 2011 aluminum for medium-intensity applications, the T3 state material offers great formability even at lower strengths. For higher-strength requirements, the T8 state material is recommended. The 2011 alloy is particularly well-suited for automatic lathe machining, where it demonstrates high productivity and excellent workability. It rarely requires chip breakers, thanks to its fine chips and self-cleaning cutting surface. This alloy is widely used in hardware components, automotive oil systems, clock parts, gears, pipelines, audio-visual connectors, photographic equipment, instrument shafts, military products, industrial connectors, odometers, potentiometers, timers, and electronic auxiliary devices.
One of the key advantages of 2011 aluminum is its exceptional processability, making it a top choice for precision engineering tasks. Its mechanical processing performance is rated at level A, indicating superior quality. Chips produced during machining are small, and the cutting surface remains clean throughout the process, ensuring high-quality finished products. The alloy is extensively utilized in various industries, including automotive, electronics, and defense, where precision and reliability are paramount.
Chemical Composition:
- Silicon (Si): 0.40%
- Iron (Fe): 0.70%
- Copper (Cu): 5.0–6.0%
- Silicon + Iron: 0.40%
- Magnesium (Mg): Not specified
- Lead (Pb): 0.2–0.6%
- Zinc (Zn): 0.30%
- Bismuth (Bi): 0.2–0.6%
- Other Elements: 0.05% (single), 0.15% (total)
- Aluminum (Al): Remainder
Mechanical Properties:
- Tensile Strength: ≥310 MPa
- Yield Strength: ≥235 MPa
- Elongation: 10%
- Density: 2.85 g/cm³
- Linear Expansion Coefficient: N/A
- Thermal Conductivity: N/A
- Specific Heat Capacity: N/A
This alloy's combination of properties makes it an ideal choice for demanding applications requiring both strength and ease of machining. Whether in automotive or electronic sectors, the 2011 aluminum alloy proves indispensable for manufacturers looking to enhance efficiency and product quality.
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