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Useful Steel Data

 

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2011:

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Disclaimer: The content of this page is for general information only and is not to be used for engineering or design. The content of this material specification page was compiled from available public sources and authorities on material properties. Although we believe the information to be corrrect, Metal Stock, Inc. is not responsible for the accuracy of any of the material specifications and only presents this data as general information for our customers.

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.


General Information about 2011:


APPLICATIONS:

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.

MACHINING AND WELDING:

2011: 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° - 900°F. 2011 has poor welding characteristics and is generally considered unsuitable for brazing and soldering.

HEAT TREATING - Forging, Normalizing, and Annealing:

Optimum strength (T8 Temper) is obtained by solution heat treatment at 950°F 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 for two to three hours, followed by a controlled cooling at a rate of 50°F per hour down to 500°F and then air cool.

AGING:
Age hardening, typical for T4 temper, is done by a 950°F soak for three 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.


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