Aluminium / Aluminum 2219 Alloy (UNS A92219)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Heat Treatment
     Forging
     Hot working
     Cold working
     Annealing
     Aging
     Hardening
Applications

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

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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.