7049
UNS A97049
Description
Aluminum alloy 7049 is a forging alloy. It has very high mechanical properties (tensile strength), good machinability, high resistance to stress corrosion cracking. Due to its excellent resistance to stress corrosion cracking, this alloy is often used in structural forgings. And aluminum alloy 7049 is forgeable from 438 °C (820 °F) down to 382 °C (720 °F). Alloy also can be hot formed, but it can not be weldable (in some cases, tungsten inert gas welding can be applied). Typically used of 7049 is in aircraft structural parts.
Chemical Component
| Al | Fe | Cu | Mg | Mn | Zn | Ti | Cr | Si |
|---|---|---|---|---|---|---|---|---|
| Balance | 0.50% max | 1.20-1.90% | 2.10-3.10% | 0.50% max | 7.20-8.40% | 0.25% max | 0.10-0.22% | 0.25% max |
Basic Information
| Items | 7049 |
|---|---|
| Catalog | ACAM-Al-A023 |
| Density | 2.84 g/cm3 |
| Specific Heat Capacity | 0.960 J/g-°C |
| Thermal Expansion | 23.4 x 10-6 /K |
| Poisson's Ratio | 0.33 |
| Thermal Conductivity | 154 W/m.K |
| Modulus of Elasticity | 71.7 GPa |
| Melting Point | 477 °C |
Material Forms
Alfa Chemistry offers aluminum alloy 7049 in a variety of forms, including Plate, Round Bar, Bar, Tube and Extrusions.
And 7049 is supplied in a wide range of tempers, including:
T7351: Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged in order to achieve the best stress corrosion resistance. The products receive no further straightening after stretching.
T73511: Solution heat-treated, stress-relieved by controlled stretching (permanent set 1% to 3% for extruded rod, bar, shapes and tube, 0.5% to 3% for drawn tube) and then artificially overaged in order to achieve the best stress corrosion resistance. The products receive no further straightening after stretching, except that minor straightening is allowed after stretching to comply with standard tolerances.
T76511: Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged in order to achieve a good exfoli-ation corrosion resistance. The products receive no further straightening after stretching, except that minor straightening is allowed after stretching to comply with standard tolerances.
Mechanical Properties
| Items | 7049 |
|---|---|
| Hardness, Brinell | 135 |
| Hardness, Knoop | 170 |
| Hardness, Rockwell A | 50.5 |
| Hardness, Rockwell B | 82 |
| Hardness, Vickers | 155 |
| Tensile Strength, Ultimate | 517 Mpa (75000 psi) |
| Tensile Strength, Yield | 448 Mpa (65000 psi) |
| Elongation at Break | 12% |
| Shear Modulus | 27.6 Gpa (4000 ksi) |
| Shear Strength | 303 Mpa (44000 psi) |
| Proof Strength | 517 MPa |
Applications
Aluminum alloy 7049 is mainly used in structural forgings, especially in the missile or aircraft industries.
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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