Alcoa 2011, a cold finished aluminum wrought product, is suggested for applications requiring high productivity and excellent machinability. It is the most free-machining of all aluminum alloys due to the additions of lead and bismuth. Typical applications include auto fuel system componentry, clock parts, gears, machine parts, pipe stems, TV fittings, camera parts, meter shafts, ordnance, industrial connectors, and speedometer components.

The -T3 temper is the choice when high productivity at moderate strength is key. The -T451 temper offers excellent deep hole drilling characteristics at a lower strength level. When higher strength is required, -T8 temper is the preferred choice.

Alcoa 2011 offers excellent machinability with high productivity when machined using single-point or multi-spindle carbide tools on screw machines. The use of a chip breaker is not necessary in most cases. Being the most free-machining of all aluminum screw machine stock alloys, Toolrite 2011® is rated "A" giving very small broken chips and excellent surface finish on the final machined part. Machined finishes in the range of 5 to 10 microinches have been obtained in some applications using carbide tools.

The properties listed in this Alloy Data Sheet represent the best current information for this alloy. In each specific application, the user is expected to evaluate and test the alloy, temper and finishing method. Consult the Material Safety Data Sheet (MSDS) for proper safety and handling precautions when using Toolrite 2011® alloy.

2011 Temper Designations and Definitions

Standard Tempers T3
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T451

Standard Temper Definitions*
Solution heat-treated, cold worked and naturally aged. Applies to products that are cold worked to improve strength after solution heat-treatment, or in which the effect of cold work in flattening or straightening is recognized in mechanical property limits.

Stress-relieved temper. Solution heat-treated and naturally aged. Applies to products that are not cold worked after solution heat-treatment, or in which the effect of cold work in flattening or straightening may not be recognized in mechanical property limits.

T8

Solution heat-treated, cold worked and then artificially aged. Applies to products that are cold worked to improve strength, or in which the effect of cold work in flattening and straightening is recognized in mechanical property limits.

"For further details of definitions, see Aluminum Association's Aluminum Standards and Data manual and Tempers for Aluminum and Aluminum Alloy Products.

Toolrite 2011® Chemical Analys S Liquidus Temperature: 1180°F Solid JS Temperature: 1005°F Density: 0.102 lb./in.3
Percent Weight Minimum Sj — 5.0 Elements Mn Mg Cr Zn Tj Pb
.20 Bi .20 Others Each Others Total Aluminum
Maximum .40 .7 6.0 — — — .30 — .6 .6 .05 .15 Remainder
Average Coefficient of Thermal Expansion (68° to 212° F) = 13.0 x 10-6 (inch per inch per °F)
Toolrite 2011® is a registered trademark of Alcoa.

2011 Global Cold Finished Products Capabilities and Mechanical Property Limits
Temper Specified
Section or
Wall Thickness2
(inches) Tensile Strength (ksi) Elongation3 Typical
Brinell
Hardness
(500 kg load/ 10 mm ball) Typical
Ultimate
Shearing
Strength
(ksi) Typical
Electrical Conductivity
(%IACS)
Percent Min. in 2 inch or 4D"
Ultimate Yield (0.2% offset) Min.
Mia.
Standard Tempers1

T3

45.0 38.0 10 80 30 45
.125-1.500 45.0 38.0 10 80 30 45
1.501-2.000 43.0 34.0 10 80 30 45
2.001-4.000 42.0 30.0 10 80 30 45

T4515

40.0 18.0 16 95 32 39
.500-8.000 40.0 18.0 16 95 32 39
T8 — 54.0 40.0 12 100 35 —
.125-3.250 54.0 40.0 12 100 35 —

Source: http://www.alcoa.com/gcfp/catalog/pdf/alcoa_toolrite_2011.pdf