Sep 18 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Forming Welding Heat Treatment Forging Hot working Cold working Annealing Aging HardeningApplications
Introduction
Aluminum alloys have high corrosion resistance. The strength of these alloys can be reduced when they are subjected to temperatures of about 200 to 250°C. However, their strength can be increased at subzero temperatures. Aluminium /Aluminum 2219 alloy is an age-hardenable copper containing alloy.
The following datasheet gives details about Aluminium /Aluminum 2219 alloy.
Chemical Composition
The following table shows the chemical composition of Aluminium /Aluminum 2219 alloy.
| Element |
Content (%) |
| Aluminum, Al |
93 |
| Copper, Cu |
6.3 |
| Manganese, Mn |
0.3 |
| Zirconium, Zr |
0.18 |
| Vanadium, V |
0.10 |
| Titanium, Ti |
0.06 |
Physical Properties
The physical properties of Aluminium /Aluminum 2219 alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Density |
2.6-2.8 g/cm3 |
0.0939- 0.101 lb/in3 |
| Melting point |
510°C |
950°F |
Mechanical Properties
The mechanical properties of Aluminium /Aluminum 2219 alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
170 MPa |
24656 ksi |
| Yield strength |
76 MPa |
1022 ksi |
| Fatigue strength |
105 MPa |
15229 |
| Elastic modulus |
70-80 GPa |
10153-11603 ksi |
| Poisson's ratio |
0.33 |
0.33 |
| Elongation |
18% |
18% |
Thermal Properties
The thermal properties of Aluminium /Aluminum 2219 alloy are given in the following table.
| Properties |
Conditions |
| T (ºC) |
Treatment |
| Thermal conductivity |
170 W/mK |
25 |
- |
Other Designations
Other designations that are equivalent to Aluminium /Aluminum 2219 alloy include:
| AMS 4066 |
ASTM B211 |
ASTM B247 |
MIL A-46808 |
QQ A-367 |
| AMS 4068 |
ASTM B221 |
ASTM B316 |
MIL A-8920 |
QQ A-430 |
| ASTM B209 |
ASTM B241 |
MIL A-46118 |
QQ A-250\30 |
SAE J454 |
Fabrication and Heat Treatment
Machinability
Aluminium /Aluminum 2219 alloy can be machined in the annealed condition. In the heat treated condition, this alloy is very difficult to machine. Oil base lubrication is used to perform machining operations.
Forming
Aluminium /Aluminum 2219 alloy can be formed using conventional techniques.
Welding
Aluminium /Aluminum 2219 alloy can be welded using resistance welding, and inert gas welding techniques with high precautions in order to prevent cracking. This process is followed by heat treatment in order to maintain the corrosion resistance property of this alloy.
Heat Treatment
Aluminium /Aluminum 2219 alloy can be heat treated at 538°C (1000°F) followed by quenching in cold water.
Forging
Aluminium /Aluminum 2219 alloy can be forged to maintain the corrosion resistance property.
Hot working
Aluminium /Aluminum 2219 alloy should not be hot worked if they are not subjected to heat treatment in order to restore the corrosion resistance property of this alloy.
Cold working
Aluminium /Aluminum 2219 alloy can be cold worked using conventional methods.
Annealing
Aluminium /Aluminum 2219 alloy is annealed at 538°C (1000°F) for sufficient time followed by quenching in cold water.
Aging
Aluminium /Aluminum 2219 alloy can be aged at 190°C (375°F) for varying time after annealing and quenching. Forgings can be aged at 190°C (375°F) for 18 h, and sheet or plate type product forms can be aged at 190°C (375°F) for 36 h followed by cooling in air.
Hardening
Aluminium /Aluminum 2219 alloy is hardened by aging or cold working.
Applications
Aluminium /Aluminum 2219 alloy is suitable for manufacturing structural components, which are used in high strength weldments and high temperature applications.