6061 Aluminum Properties: Al 6061 Modulus of Elasticity

6061 Aluminum Properties: Al 6061 Modulus of Elasticity

When it comes to versatile aluminum that excels across endless applications, the 6061 alloys are indispensable. It crushes that delicate balance of good enough strength, weight savings, excellent corrosion resistance, and money-saving affordability like no other metal. We’re talking versatile to the max for everything automotive, aerospace, marine, architecture, equipment, and general manufacturing in between. It welds and machines like a dream while shrugging off outdoor abuse better than standard alloys.

In this guide, we will break down what makes 6061 so universally good before running through some examples of putting this stuff to work. This ain’t no experimental flash. 6061 aluminum has proven its mettle for decades and remains a manufacturing mainstay today.

Mechanical Properties of 6061 Aluminum

The composition and processing history of 6061 aluminum gives the material mechanical and physical attributes well-suited for numerous fabrication and building purposes. You’ll never see 6061 aluminum in cutting-edge aerospace masterpieces, but its well-rounded capabilities still impress:


The yield point of untreated 6061 aluminum is typically 35,000 psi, indicating the stress at which plastic deformation begins to occur. Work hardening and heat treating can increase this number.

Tensile Strength

The maximum tensile stress 6061 aluminum can withstand tension is around 42,000 psi for T6 tempered material.

Elastic Modulus

The elastic modulus or modulus of elasticity for aluminum 6061 defines elastic deformation response to applied loads. Values range between 96 and 107 GPa (14 to 15.5 million psi) depending upon the exact alloy composition and hardening.


Scales from 60 to nearly 100 Brinell following common heat treatment practices. Hardness levels correlate closely to ultimate tensile strength.

Though not as strong as steel, 6061 aluminum provides high strength for applications where considerable reductions in weight and corrosion resistance are advantageous.

Physical Properties of 6061 Aluminum

Beyond mechanics, 6061 aluminum impresses with extra physical talents:


6061 aluminum is roughly one-third the density of mild steel with a density of around 2.7 g/cm3. This low specific gravity facilitates lighter component weights helpful in transport applications.

Electrical Conductivity

While only about 60% as conductive as pure copper, aluminum 6061 still displays good electrical and thermal conductivity for affordable structural metal.

Corrosion Resistance

Aluminum naturally develops an externally protective oxide coating upon exposure to air. 6061 alloy enhances corrosion protection with magnesium and silicon additions, allowing its use across numerous indoor and outdoor environments.


Containing no more than 0.8% silicon plus iron and copper, 6061 alloy readily forms by extrusion, forging, or rolling processes. This permits the economical production of rod, bar, plate, sheet, and intricate extruded profiles.

The balanced physical properties of 6061 aluminum provide versatility of form and function combined with improved durability compared to commercially pure aluminum grades. When you need more strength over basic aluminum but don’t require extreme aerospace credentials, this stuff perfectly splits the difference at a solid C+ letter grade.

Chemical Composition of 6061 Aluminum

While making up over 97% of its composition, pure aluminum sets the lightweight strength floor. But adding around half a percent silicon and a full percent magnesium makes 6061 reliability happen. These two orchestrate heat treatment behaviors for earning 6061 extra hardness credits through precipitation reactions.

Common Product Forms

Its balanced behavior makes 6061 available off the shelf in all shapes and sizes:
Sheet: Aluminum sheets are smooth and flat from 0.006 to 0.125 inches thick for applications like fuel tanks, truck trailer liners, and solar panel frames. Often anodized.
Bar and Rod: Aluminum bars and rods are round and hex sticks in lengths over 20 feet and diameters up to 15 inches, used for machined screws, rivets, welded frames, and fittings.
Tube/Pipe: Aluminum pipes/tubes are plumbing tubes that won’t rust like steel versions. 6061 aluminum pipe meeting plumbing and hydraulic system pressure needs while lowering weight. Available in schedules 10 to 160.
Plate: Aluminum plates are flat slabs for mold tools and structural bases.
Extrusions: Aluminum extrusions are constant profile sections for rails, frames, and channels for special fit and function.

6061 Aluminum Applications

Across manufacturing, engineers count on reliable 6061 capabilities for:
Automotive Chassis Members: They possess superior specific strength compared to steel in structural frame rails, cross members, suspension arms, and bumper reinforcements. Allows larger payloads for trucks and more efficient passenger vehicles.
Aerospace Components: Their durable aluminum fittings, couplings, housings, and brackets withstand vibration while saving weight for improved fuel efficiency and range to meet airline operating costs. Approved for many interior aircraft parts as well. Readily machined.
Marine Vessels: Saltwater-resistant 6061-T6 plates weld into boat hulls without corrosion. Extruded shapes form radar arches, tubing, fishing rod holders, and deck hardware. Also used for propellers and cleats.

Where cost pressures or weight targets rule over extreme performance, 6061 fills the role affordably. It splits run time evenly between jack and master compared to more specialized aluminum options.


Across manufacturing, no alloy maneuvers better tradeoffs of strength, weight, and cost than versatile 6061 aluminum. It confidently handles thousands of applications other metals simply can’t address due to smart alloying additions and bolstering capabilities. While it doesn’t dominate any singular trait, jack-of-all-trades 6061 masterfully fills gaps, making it an essential engineering staple. If you want to learn more about 6061 Aluminum, feel free to reach us at YK-Longshun.

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