| Analysis | Mechanical_Properties | Applications | Machineability_and_Weldability | Heat_Treating | Tolerances | Speedy Metals items |
2011 is the most widely used of the aluminum alloys for screw machine parts. Because of its free machining elements, lead and bismuth, 2011 machines exceptionally well, its chips breaking small and easily, and can be machined to close tolerances while affording smooth, bright finishes. Fine aluminum chips equates to faster feeds and longer tool life. 2011 has good strength and average formability. Electrical conductivity is 38% of copper. 2011 can be anodized to enhance corrosion resistance.
2011 Conforms to ASTM B211, QQ-A-225/3
The above values are average and may be considered as representative of 2011 Aluminum
2011 is commonly used for high speed automatic screw machine parts, small precision gears, machine parts, atomizer and hose parts, pipe stems, TV fittings, auto fuel system components, clock parts, tube fittings, camera parts, industrial connectors, speedometer components, etc
Because of the free machining characteristics of 2011, it is the standard (100%) for relative machining when compared to all other aluminum alloys. It is rated 100% in both the T3 and T8 condition. Forging, or hot working, may be accomplished in the temperature range of 550 - 900F. 2011 has poor welding characteristics, and is generally considered unsuitable for brazing and soldering.
Optimum strength (T8 Temper) is obtained by solution heat treatment at 950F for adequate time to insure complete heating followed by water quenching and then cold working to desired part and followed by a 320°F heating for 15 hours and air cool.
ANNEALING
Annealing is done at 775°F by holding at that temperature at 2-3 hours, followed by a controlled cooling at a rate of 50F per hour down to 50°0F and then air cool.
AGING
Age hardening, typical for T4 temper, is done by a 950°F soak for 3 hours followed by a water quench. Other temper variations are possible with additional treatment such as heating to 320°F for 14 hours, after solution heating, to produce T8 temper.
TEMPERING
Not Applicable
| ROUND | |
| Diameter (in) | Tolerance (in) (+/-) |
| .125 to .500 | 0.0015 |
| .501 to 1.000 | 0.002 |
| 1.001 to 1.500 | 0.0025 |
| 1.501 to 2.000 | 0.004 |
| 2.001 to 3.000 | 0.006 |
| 3.001 to 3.375 | 0.008 |
| HEXAGON | |
| Size (in) | Tolerance (in) (+/-) |
| .125 to .500 | 0.002 |
| .501 to 1.000 | 0.0025 |
| 1.001 to 1.500 | 0.003 |
| 1.501 to 2.000 | 0.005 |
| 2.001 to 3.000 | 0.008 |
| Cross-sectional dims(in) | Tolerance (in) (+/-) |
| Under .125 | 0.006 |
| .125 to under .250 | 0.007 |
| .250 to under .500 | 0.008 |
| .500 to under .750 | 0.009 |
| .750 to under 1.0 | 0.01 |
| 1.0 to under 1.5 | 0.012 |
| 1.5 to under 2.0 | 0.014 |
| 2.0 to under 4.0 | 0.024 |
| 4.0 to under 6.0 | 0.034 |
| 6.0 to under 8.0 | 0.044 |
| 8.0 to under 10.0 | 0.054 |