Aluminum 7068 Alloy (UNS A97068)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Aluminium / aluminum is a light-weight metal with a bright silvery luster. This metal along with its alloys are in high demand worldwide.

Aluminium / aluminum 7068 alloy is a heat treatable wrought alloy with good fatigue strength, good anodizing response, and high thermal conductivity. It was designed as a higher strength alternative to aluminium/aluminum 7075 for ordnance applications. It also provides the highest mechanical strength of all aluminium / aluminum alloys.

The following datasheet will provide more details about aluminium / aluminum 7068 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 7068 alloy.

Element Content (%)
Zinc, Zn 8.3
Magnesium, Mg 3
Copper, Cu 2.4
Iron, Fe 0.15
Zirconium, Zr 0.15
Silicon, Si 0.12
Manganese, Mn 0.1
Titanium, Ti 0.1
Chromium, Cr 0.05
Other (each) 0.05
Other (total) 0.15
Aluminum, Al Remainder

Physical Properties

The physical properties of aluminium / aluminum 7068 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.85 mg/cm³ 0.103 lb/in³
Melting point 476-635 ºC 890-1175 ºF

Mechanical Properties

The mechanical properties of aluminium / aluminum 7068 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 641 MPa 93 ksi
Yield strength 590 MPa 85.7 ksi
Elongation 8% 8%

Thermal Properties

The thermal properties of aluminium / aluminum 7068 alloy are tabulated below.

Properties Metric Imperial
Thermal conductivity 190 W/mK 1317 BTU in/hr.ft².°F

Other Designations

Equivalent materials to aluminium / aluminum 7068 alloys are listed below:

  • AMS 4331
  • AMS 2772


The machinability of aluminium / aluminum 7068 alloy is good and matches that of aluminium / aluminum 7075 alloy; however welding should be performed with expert advice. Anodizing of this alloy is possible using all the traditional techniques. When performing hard anodizing, the surface becomes more abrasion resistant.


Aluminium / aluminum 7068 alloy is chiefly used in the following areas:

  • 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

Date Added: May 8, 2013 | Updated: Jul 17, 2013
Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback