| A2219 | |
|---|---|
| Physical properties | |
| Density(ρ) | 2.84 g/cm3[1] |
| Mechanical properties | |
| Young's modulus(E) | 73.8 GPa (10,700 ksi) |
| Tensile strength(σt) | 172–476 MPa (24.9–69.0 ksi) |
| Elongation(ε)atbreak | 3-14% |
| Poisson's ratio(ν) | 0.33 |
| Thermal properties | |
| Melting temperature(Tm) | 543 °C (1,009 °F) |
| Thermal conductivity(k) | 116-170 W/m*K |
| Linear thermal expansion coefficient(α) | 2.25*10−5 K−1 |
| Specific heat capacity(c) | 864 J/kg*K |
| Electrical properties | |
| Volumeresistivity(ρ) | 39-62 nOhm*m |
2219aluminium alloy is an alloy in the wrought aluminium-copper family (2000 or 2xxx series). It can beheat-treated to produce tempers with higher strength but lower ductility. The aluminium-copper alloys have high strength, but are generally less corrosion resistant and harder to weld than other types of aluminium alloys. To compensate for the lower corrosion resistance, 2219 aluminium can be clad in a commercially pure alloy such as1050 or painted. This alloy is commonly formed by bothextrusion andforging, but is not used incasting.[2]
The 2219aluminium alloy in particular has high fracture toughness, is weldable and resistant tostress corrosion cracking, therefore it is widely used in supersonic aircraft skin and structural members. TheSpace Shuttle Standard Weight Tank was also fabricated from the 2219 alloy. TheColumbus module on theInternational Space Station also used 2219 aluminium alloy with a cylinder thickness of 4 mm, which was increased to 7 mm for the end cones.[3] The dome and skirt of theCupola Module on the International Space Station also uses 2219 aluminium alloy.[4]
Alternate designations include AlCu6Mn and A92219. It is described in the following standards:[5]
The alloy composition of 2219 aluminium is:[5]
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