7068
UNS A97068
Description
Aluminum alloy 7068 is a heat treatable wrought alloy, providing the highest mechanical strength of all aluminum alloys and matching that of certain steels. It has good fatigue strength, good anodizing response, good ductility, and high thermal conductivity. Its ultimate tensile strength and yield strength are up to 700 MPa (greater than that of 7075 alloy) while corrosion resistance is similar to 7075 alloy. Specifically, 7068-T6511 has typical ultimate tensile strength of 710 MPa (103 ksi) versus a similar product produced from 7075-T6511 that would have a typical ultimate tensile strength of 640 MPa (93 ksi). Typical yield strength for alloy 7068-T6511 is 683 MPa (99.1 ksi) versus 590 MPa (86 ksi) for a similar product produced from 7075-T6511. Thus, it was designed as a higher strength alternative to aluminum 7075 for ordnance applications.
Chemical Component
| Fe | Cu | Mg | Mn | Zn | Ti | Cr | Si | Zr | Others |
|---|---|---|---|---|---|---|---|---|---|
| 0.15% max | 1.6-2.4% | 2.2-3.0% | 0.10% max | 7.3-8.3% | 0.10% max | 0.05% max | 0.12% max | 0.05-0.15% | 0.05% max (each) 0.15% max (total) |
Basic Information
| Items | 7068 |
|---|---|
| Catalog | ACAM-Al-A025 |
| Density | 2.85 g/cm3 at 20 °C |
| Specific Thermal Capacity | 1050 J/Kg.K at 100 °C |
| Mean Coefficient of Thermal Expansion | At 20-100 °C: 23.4 x 10-6/K |
| Thermal Conductivity | 190 W/m.K at 20 °C |
| Young's Modulus | 73.1 GPa |
| Melting Range | 476-635 °C |
Material Forms
Alfa Chemistry offers aluminum alloy 7068 in a variety of forms, including Flats, Round Bar, Plate and Square Bar.
Mechanical Properties
- Minimum mechanical properties (extruded bar)
| Temper | Section, in | UTS, MPa | YTS, MPa | Elongation, % |
|---|---|---|---|---|
| T6 / T6511 | 0.250-3.000 | 683 | 655 | 5 |
| T6 / T6511 | 3.001-6.500 | 648 | 621 | 5 |
| T76 / T76511 | 0.250-3.000 | 593 | 552 | 7 |
- Comparative minimum data for various aluminum alloy extrusions
| Materials | Temper | Section, in | UTS, MPa | YTS, MPa | Elongation, % |
|---|---|---|---|---|---|
| 7068 | T6511 | 0.25-3.00 | 683 | 655 | 5 |
| 7150 | T6511 | 0.80-2.40 | 615 | 580 | 8 |
| 7075 | T6511 | 0.50-3.00 | 559 | 496 | 7 |
| 2014A | T6511 | 1.00-3.00 | 480 | 440 | 7 |
| 2618A | T6 | 0.40-4.00 | 420 | 340 | 7 |
Applications
Aluminum alloy 7068 can be used in a variety of applications, including:
- Connecting rods
- Autosport gearbox actuators and wheel components
- Prosthetic limbs
- Load cells
- Hydraulic valve components
- High pressure solenoids
- Flexible shaft coupling
- Snowmobile engine shafts
- Automobile shock absorbers
- Fuel pumps for racing engines
- Motorcycle gears
- Recreational products such as tents, ski and backpack rods, bicycles and mountain climbing equipment
- Automotive valve body and connecting rod
* 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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