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2011-T3 Free-Cutting Aluminum Bar: Superior Chip Breaking For High-Speed Precision CNC Automatic Lathe Machining
The 2011-T3 aluminum alloy bar is a dedicated free-cutting aluminum material engineered for high-speed CNC automatic lathe operations and precision screw machine production. As the benchmark free-machining aluminum alloy in the 2000 series, 2011-T3 incorporates bismuth and lead micro-alloying elements that promote superior chip breaking characteristics, dramatically reducing built-up edge formation on cutting tools and enabling uninterrupted high-volume production runs.
Manufacturers in the automotive, electronics, hydraulic, and precision engineering sectors rely on 2011-T3 aluminum bars to achieve tight dimensional tolerances, excellent surface finishes, and extended tool life in high-speed machining environments. The alloy delivers machining performance comparable to free-cutting brass while offering the lightweight advantage of aluminum at approximately one-third the density.
Key Features
Superior Chip Breaking: Bismuth and lead additions promote short, brittle chip formation that clears automatically from the cutting zone, preventing chip entanglement and tool damage during unattended CNC operations.
Exceptional Machinability Rating: Rated at 95% or higher relative to C36000 free-cutting brass, making it the most machinable aluminum alloy available for automatic lathe and screw machine production.
High-Speed Cutting Performance: Maintains stable cutting behavior at spindle speeds exceeding 4,000 RPM, reducing cycle times and improving throughput in high-volume manufacturing environments.
Excellent Surface Finish After Machining: Produces smooth, burr-free surfaces directly from the cutting tool, often eliminating the need for secondary finishing operations on turned components.
Lightweight Construction: Density of approximately 2.82 g/cm³ provides significant weight reduction compared to steel or brass alternatives, reducing machine load and improving handling efficiency.
Consistent Dimensional Stability: T3 temper ensures uniform mechanical properties throughout the bar length, enabling predictable machining behavior and tight tolerance control across production batches.
Extended Tool Life: Low cutting resistance and minimal abrasive wear reduce cutting edge degradation, decreasing tool change frequency and lowering overall production costs.
Technical Specifications
Parameter
Specification
Alloy Grade
2011-T3
Chemical Composition
Al-Cu (5.0-6.0%)-Bi (0.2-0.6%)-Pb (0.2-0.6%)
Tensile Strength
≥ 310 MPa
Yield Strength (0.2% Offset)
≥ 240 MPa
Elongation at Break
≥ 10%
Hardness
≥ 95 HB
Diameter Range
6 mm - 150 mm
Length Options
1 m / 2 m / 3 m / Custom up to 6 m
Shape
Round Bar
Surface Finish
Mill Finish / Polished
Applicable Standards
ASTM B211, AMS 4120, QQ-A-225/3
Applications
2011-T3 aluminum bars are specifically formulated for high-speed automatic machining applications where productivity and part consistency are critical. Typical components include precision turned shafts, hydraulic valve bodies, pneumatic connector fittings, electronic connector housings, camera lens mounts, fuel system components, screw machine products, watch cases, and instrument parts.
The alloy is widely adopted in Swiss-type automatic lathes, multi-spindle screw machines, and CNC turning centers producing threaded fasteners, bushings, spacers, and precision mechanical components at high volumes. Its superior chip control makes it especially suitable for deep-hole drilling operations and complex internal profiling where chip evacuation is essential.
Packaging & Quality Assurance
Each shipment of 2011-T3 aluminum bars is packed in export-standard seaworthy wooden pallets with moisture-resistant wrapping and steel strapping for secure transit. Bars are individually separated with protective interleaving to prevent surface abrasion during shipping.
Our quality control includes spectrographic chemical analysis for every heat batch, 100% dimensional inspection, ultrasonic testing for internal integrity, and mechanical property verification per ASTM B211 requirements. Mill test certificates (MTC) with full traceability are included with every shipment.
Custom cutting, chamfering, and protective end-capping are available upon request. All products are backed by SGS, ISO, CE, and BIS certifications.
Shanxi Taigang Stainless Steel Co., Ltd. focuses on the development of special steel mainly made of stainless steel,
and has formed a cluster of high-efficiency, energy-saving and long-l ife steel products mainly composed of stainless
steel, cold-rol led si l icon steel, and high-streng... Shanxi Taigang Stainless Steel Co., Ltd. focuses on the development of special steel mainly made of stainless steel,
and has formed a cluster of high-efficiency, energy-saving and long-l ife steel products mainly composed of stainless
steel, cold-rol led si l icon steel, and high-streng...
