ThePipingMart Blog Grades Aluminum 8009 Alloy (UNS A98009) – Composition, Properties and Uses

Aluminum 8009 Alloy (UNS A98009) – Composition, Properties and Uses

Aluminium 8009

Aluminium 8009 is a special-grade aluminium alloy that is known for its superior corrosion resistance, heat resistance, heat treatability, and machining capabilities. 8009 Alloy’s often used in manufacturing parts for cars, boats, and other vehicles, as well as products like window frames. Let’s take a closer look at what makes UNS A98009 so unique.

8009 Alloy Composition

Element Content (%)
Aluminum, Al 86.7 – 88.8
Iron, Fe 8.4 – 8.9
Silicon, Si 1.7 – 1.9
Vanadium, V 1.1 – 1.5
Oxygen, O ≤ 0.30
Zinc, Zn ≤ 0.25
Titanium, Ti ≤ 0.10
Chromium, Cr ≤ 0.10
Manganese, Mn ≤ 0.10
Other (each) ≤ 0.050
Other (total) ≤ 0.15

8009 Alloy Physical Properties

Physical Properties Metric English Comments
Density 2.92 g/cc 0.105 lb/in³

8009 Alloy Mechanical Properties

Mechanical Properties Metric English Comments
Hardness, Brinell 140 140
Tensile Strength, Ultimate 450 MPa 65300 psi
270 MPa
@Temperature 300 °C,
Time 3.60e+6 sec
39200 psi
@Temperature 572 °F,
Time 1000 hour
310 MPa
@Temperature 250 °C,
Time 3.60e+6 sec
45000 psi
@Temperature 482 °F,
Time 1000 hour
350 MPa
@Temperature 200 °C,
Time 3.60e+6 sec
50800 psi
@Temperature 392 °F,
Time 1000 hour
380 MPa
@Temperature 150 °C,
Time 3.60e+6 sec
55100 psi
@Temperature 302 °F,
Time 1000 hour
410 MPa
@Temperature 100 °C,
Time 3.60e+6 sec
59500 psi
@Temperature 212 °F,
Time 1000 hour
Tensile Strength, Yield 385 MPa 55800 psi
240 MPa
@Temperature 300 °C
34800 psi
@Temperature 572 °F
275 MPa
@Temperature 250 °C
39900 psi
@Temperature 482 °F
310 MPa
@Temperature 200 °C
45000 psi
@Temperature 392 °F
350 MPa
@Temperature 150 °C
50800 psi
@Temperature 302 °F
370 MPa
@Temperature 100 °C
53700 psi
@Temperature 212 °F
Elongation at Yield 15 % 15 %
Tensile Modulus 90.0 GPa 13100 ksi
Fatigue Strength 160 MPa
@Temperature 250 °C
23200 psi
@Temperature 482 °F

8009 Alloy Thermal Properties

Thermal Properties Metric English Comments
CTE, linear 19.0 µm/m-°C 10.6 µin/in-°F
Thermal Conductivity 115 W/m-K 798 BTU-in/hr-ft²-°F

8009 Alloy Uses

Aluminium 8009 boasts a variety of beneficial uses and is one of the most beneficial aluminum alloys on the market. It is specifically used for high-strength and lightweight structures, making it an ideal choice for structures used in aircraft and automotive industries. It can also be used for architectural applications due to its superior thermal insulation qualities and resistance to corrosion from weathering elements. On top of this, aluminium 8009 has great mechanical properties, which makes it perfect for various manufacturing processes ranging from extrusion to forging, rolling, and coining. Its multiple uses make aluminium 8009 the ultimate choice in cost-efficient yet strong metals suitable for almost any purpose.

Corrosion Resistance

Aluminium 8009 has excellent resistance to corrosion caused by salt water or air exposure. This makes it ideal for use in industries such as automotive and marine, where parts may be exposed to harsh conditions. The high corrosion resistance also makes it suitable for use in window frames which are exposed to the elements year-round.

Heat Resistance

aluminum 8009 also has excellent heat resistance properties, meaning it can withstand temperatures up to 350°C with minimal degradation of its properties. This makes it well suited for applications where parts may be exposed to high temperatures, such as hot air ducts or exhaust systems.

Heat Treatment

Aluminium 8009 is also notable for its ability to be heat treated without losing its corrosion-resistant properties. This means that manufacturers can alter the mechanical properties of the material by subjecting it to different temperatures without compromising the integrity of the material itself. This makes aluminium 8009 an extremely versatile material that can be used in various applications.

Machining & Welding

As well as being highly corrosion-resistant and heat-treatable, aluminum 8009 is relatively easy to machine and weld compared to other grades of aluminum alloys. It’s important to note, however, that its higher strength and hardness, when compared with other grades, require slightly more effort when machining or welding than other grades would require. Nonetheless, these processes can still be achieved with relative ease, given the right equipment and expertise.


Aluminum 8009 has numerous advantages over other grades of aluminium alloys, making it ideal for use in many different industries ranging from automotive and marine manufacturing to window frame construction. It offers superior corrosion resistance, excellent heat-resisting properties, easy machinability and weldability, as well as being the ability to withstand extreme temperature changes without compromising any of its qualities, making this grade of aluminum a great choice for those looking for a reliable material that will stand against wear and tear over time! With all these features combined into one alloy, you can see why Aluminium 8009 is becoming increasingly popular amongst manufacturers across many industries today!

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