1 November 2021 2000 Series Aluminum Alloy
2011 Aluminum Alloy Bar
2011 aluminum alloy is good deformed aluminum alloy in the American standard, which is equivalent to the Chinese standard GB 2011 aluminum alloy. The main alloying element of 2011 aluminum alloy is copper, and it contains trace amounts of lead and bismuth to improve the cutting performance. It has high strength and good cutting performance, but it has poor corrosion resistance. It is commonly found in bars, pipes and wires. 2011 aluminum alloy is used to manufacture screws and machined products that require good cutting performance.
2011 is typically used for screw machine parts, small precision gears, and precision machine parts such as clock, camera, and speedometer parts.If the ability to make your parts quickly and easily is the most important, and strength is not the primary desire, 2011-T3 is an excellent option.
Chemical Composition:
| Element | Percentage |
|---|---|
| Al | 93.7 |
| Bi | 0.2 - 0.6 |
| Cu | 5 - 6 |
| Fe | 0.7 max |
| Pb | 0.2 - 0.6 |
| Si | 0.4 max |
| Zn | 0.3 max |
Mechanical Properties:
| Property | Value |
|---|---|
| Proof Stress | 230 Min MPa |
| Tensile Strength | 310 Min MPa |
| Elongation A50 mm | 6 min % |
| Hardness Brinell | 110 HB |
| Elongation A | 8 min % |
Physical Properties:
| Property | Value |
|---|---|
| Density | 2.82 kg/m3 |
| Melting Point | 535°C |
| Modulus of Elasticity | 71 GPa |
| Electrical Resistivity | 0.45 x 10-6 Ω.m |
| Thermal Conductivity | 138 W/m.K |
| Thermal Expansion | 23 x 10-6/K |
Welding:
Welding of this alloy is NOT recommended. No common methods of producing satisfactory welds have been developed.
Heat Treatment:
Optimum strength (T8 temper) is obtained by solution heat treatment at 950 F for adequate time to insure complete heating followed by a water quench and then cold working to desired part shape and followed by a 320 F heating for 15 hours and air cool.
Forging:
Forging, or hot working, may be accomplished in the temperature range of 550 to 900 F.
Hot Working:
Hot working may be done at temperatures of 550 to 900 F.
Cold Working:
This alloy is noted for its free-machining capability. It may be cold worked by all conventional means. An aging heat treatment to develop optimum strength may follow cold working.
Annealing:
Annealing is done at 775 F by holding at that temperature for 2 to 3 hours, followed by controlled cooling at a rate of 50 F per hour down to 500 F and then air cooling.
Aging:
Age hardening (typical for T4 temper) is done by a 950 F soak for 3 hours followed by water quench. Other temper variations are possible with additional treatment such as heating to 320 F for 14 hours, after solution heating, to produce T 8 temper.
Tempering:
Not applicable .
Hardening:
Age harden by 950 F heat treatment for 3 hours and water quench. See also "Aging" and "Tempering".