Discounted shipping and material on all carts over $2000. Contact us now for a quote!

7075 t6 vs t73 article hero 7075 t6 vs t73 article hero

7075 T6 vs T73: What's the Difference?

Now that we are stocking 7075 T73 sheet, we’re here to answer this commonly asked question!

Differences Between T6 and T73?

What is T6 temper?

The T6 temper process occurs in two phases, quenching and aging, bringing the 7075 aluminum alloy to its maximum strength possible. While T6 is the stronger, more rigid of the two heat treatments in the discussion, it tends to more vulnerable to stress cracking.

What is T73 temper?

By comparison, T73 has lower strength, more flexibility, and provides a better product in extended high-stress environments. To reach this state, the material is heat-treated and aged to T6, but then they continue aging it. By overaging the material into the T73, it loses some strength but increases in durability. It is also more corrosion resistant.

Toughness decreases along with temperature for aluminum 7075. And for this reason, T73 is better suited for extremely low-temperature applications such as cryogenics.

If you are looking for specific numbers and hard data, check out our Product Guide for 7075 aluminum.

Uses for Each Temper

7075 is the strongest of the aerospace grade aluminum alloys. The first airplane that used mass amounts of 7075 aluminum was the Mitsubishi A6M Zero. The fighter’s legendary maneuverability was largely due to the superior strength to weight ratio of 7075.

world war 2 japanese zero world war 2 japanese zero

Both tempers are still used in airplanes, spacecraft, and other high strength applications. In these situations, T6 makes up the bulk of the parts. T73 is used for components that need to be more flexible or routinely undergo high and continual stress. The bases of aircraft wings are a prime example. Gears, valve parts, shafts, and landing gear are more commonly made from T73.

Here is a list of some other common uses:

  • Marine parts
  • Automotive parts
  • Rock climbing equipment
  • Bicycle components
  • Hang glider frames
  • High end gears, shafts, & valve parts
  • High end RC models
  • Lacrosse sticks
  • High end firearm receivers

Shop the Products

Aluminum round bar product photo

Aluminum Round Bar 7075 T6/T651

7075 T6 round bar is a popular tempered aluminum product due to its impressive strength properties.

Shop 7075 T6 Round Bar
Aluminum plates product photo

Aluminum Plate 7075 T73

7075 T73 plate is a unique tempered aluminum product offering great durability at lower temperatures.

Shop 7075 T73/T7351 Plate

About Online Metals

Online Metals round logo

Online Metals is the world’s leading eCommerce metal supplier, specializing in small quantity cut-to-size metals and plastics, delivered in a fast and reliable manner.

Since 1998, Online Metals has expanded our catalog to over 85,000 different cut sizes, grown our national footprint to seven pickup locations across the U.S., and continued to improve upon our best-in-class customer experience.

Check out our materials: Alloy Steel, Aluminum, Anodized Aluminum, Beryllium Copper, Brass, Bronze, Carbon Steel, Copper, Cast Iron, Nickel, Nickel Silver, Plastic, Stainless Steel, Titanium, Tool Steel, Unistrut®, Wrought Iron, & Zinc

Shop by shape: Bars, Tubes, Sheets, Plates, and More.

Can't find what you're looking for? Submit a quote or contact our support team.