ThePipingMart Blog Grades Aluminium 6061 Alloy (T6) – Composition, Properties and Uses

Aluminium 6061 Alloy (T6) – Composition, Properties and Uses

Aluminium 6061

Aluminium 6061 is an alloy made of aluminium, magnesium, and silicon. 6061 Alloy is one of the most popular alloys used in the aircraft and automotive industries due to its versatility and strength. In this blog post, we’ll explore some of the features and benefits of T6 that make it such a sought-after material for manufacturing.

6061 Alloy Composition

Element Content (%)
Aluminium / Aluminum, Al 97.9
Magnesium, Mg 1
Silicon, Si 0.60
Copper, Cu 0.28
Chromium, Cr 0.20

6061 Alloy Physical Properties

Properties Metric Imperial
Density 2.7 g/cm3 0.0975 lb/in3
Melting point 588°C 1090°F

6061 Alloy Mechanical Properties

Properties Metric Imperial
Tensile strength 310 MPa 45000 psi
Yield strength 276 MPa 40000 psi
Shear strength 207 MPa 30000 psi
Fatigue strength 96.5 MPa 14000 psi
Elastic modulus 68.9 GPa 10000 ksi
Poisson’s ratio 0.33 0.33
Elongation 12-17% 12-17%
Hardness, Brinell 95 95

6061 Alloy Thermal Properties

Properties Conditions
T (ºC) Treatment
Thermal expansion co-efficient 23.2 (10-6/ºC) 20-100
Thermal conductivity 167 W/mK 25

6061 Alloy Equivalent

AMS 4117 ASTM B247 ASTM B429 DIN 3.3211 MIL G-18014 QQ A-200/8
ASTM B209 ASTM B307 ASTM B483 MIL A-12545 MIL G-18015 QQ A-225/8
ASTM B210 ASTM B313 ASTM B547 MIL A-22771 MIL P-25995 QQ A-250/11
ASTM B211 ASTM B316 ASTM B548 MIL F-17132A MIL T-7081 QQ A-367
ASTM B221 ASTM B345 ASTM B632 MIL F-18280 MIL W-23351 QQ A-430
ASTM B234 ASTM B361 ASTM F467 MIL F-39000 MIL W-85 QQ WW-T-700/6
ASTM B241 ASTM B404 ASTM F468 MIL F-3922 QQ A-200/16 SAE J454

6061 Alloy Uses

Aluminium 6061 is an alloy that is commonly used in a variety of industrial applications. It offers excellent machinability, weldability and corrosion resistance, making it a preferred choice in many industries, including aerospace, transportation, construction and marine engineering. As a strong and lightweight material, aluminium 6061 can be used for intricate components for manufacturing purposes and in forming complicated shapes for machinery and equipment. It also has the ability to withstand temperatures just above 200 degrees Celsius which allows its use in exposed positions such as engine manifolds or when parts are subjected to high heat. Its superior strength makes it ideal for creating products that handle heavy loads, such as load-bearing structures in bridges or platforms. All these uses show aluminium 6061 is one of the most versatile materials available to engineers today.

Corrosion Resistance

Aluminum 6061 offers excellent corrosion resistance, making it a great choice for applications that face exposure to harsh environments or chemicals. It can be treated with coatings or anodizing to further increase its corrosion resistance if needed.

Heat Resistance

Aluminum 6061 also has good heat resistance properties, making it suitable for applications that require high temperatures. Its heat-resistant properties make it a great choice for aerospace applications where extreme temperatures can be encountered during flight.

Heat Treatment

Aluminium 6061 can easily be heat treated to achieve different levels of hardness and strength depending on the application’s needs. This makes it highly versatile and applicable to many different uses. For example, it can be strengthened through ageing or tempered to increase its toughness while retaining its formability.


Another benefit of aluminium 6061 is that it is relatively easy to machine and fabricate compared to other metals such as steel or titanium. This makes it ideal for applications where complex shapes need to be created, or parts must fit together precisely without significant waste material produced during machining.


Finally, aluminium 6061 can also be readily welded using any common welding technique, including gas tungsten arc welding (GTAW) or gas metal arc welding (GMAW). While there are some precautions you must take when welding aluminium, such as preheating the material before welding starts, this alloy forms strong welds with great ductility when proper techniques are employed.


In conclusion, aluminium 6061 is a versatile alloy with many desirable properties, including excellent corrosion resistance, heat resistance, machinability, and weldability – making it perfect for aircraft, automobiles & other industrial components requiring high strength with lightweight components! All these qualities make aluminium6061 one of the most popular materials in manufacturing today! Whether your project requires corrosion resistance or lightweight components with superior strength – aluminum6061 has you covered! Try out this incredible alloy today and experience all it offers!

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