ThePipingMart Blog Grades Aluminum 6201 Alloy (UNS A96201) – Composition, Properties and Uses

Aluminum 6201 Alloy (UNS A96201) – Composition, Properties and Uses

Aluminium 6201

Aluminium alloy 6201 is a versatile alloy that can be used for a variety of applications. UNS A96201 is an alloy composed of aluminum, magnesium, and silicon, which makes it highly resistant to corrosion, heat, and other elements. In this article, we’ll go over the uses of 6201 Alloy, its corrosion resistance, heat resistance, heat treatment requirements, machining capabilities and welding requirements.

6201 Alloy Composition

Element Content (%)
Aluminum, Al 98.5
Magnesium, Mg 0.80
Silicon, Si 0.70

6201 Alloy Physical Properties

Properties Metric Imperial
Density 2.6-2.8 g/cm3 0.0939-0.1011 lb/in³

6201 Alloy Mechanical Properties

Properties Metric Imperial
Elastic modulus 70-80 GPa 10152-11603 ksi
Poisson’s ratio 0.33 0.33

6201 Alloy Thermal Properties

Properties Conditions
T (ºC) Treatment
Thermal conductivity 205 W/mK 25 T81

6201 Alloy Uses

Aluminium 6201 can be used in a variety of applications due to its versatility. It is most commonly used in the aerospace industry for aircraft components such as engine parts, landing gear components and more due to its low weight and excellent corrosion resistance. It is also popularly used in automotive parts such as wheels and body panels due to its strength and lightweight. It is also used in marine applications for boat hulls and propellers due to its excellent corrosion resistance.

Corrosion Resistance

Aluminium alloy 6201 has exceptional corrosion resistance properties thanks to its composition of aluminum (94-97%), magnesium (0.8-1.2%) and silicon (0.4-0.8%). This combination makes it well suited for use in corrosive environments such as salt water or humid climates without sacrificing any strength or durability. In addition, it has very good weldability capabilities, which make it even more versatile when used outdoors or in harsh environments where welding may be necessary.

Heat Resistance

Aluminium alloy 6201 has excellent heat-resistant qualities thanks to its composition of aluminum (94-97%), magnesium (0.8-1.2%) and silicon (0.4-0.8%). This combination makes it well-suited for use in high-temperature applications without compromising strength or durability. It also has very good weldability capabilities, which make it even more versatile when used at higher temperatures where welding may be necessary.

Heat Treatment

Heat treatment requirements for aluminium 6201 are relatively simple compared to other alloys; it does not require any special preheat or interposition temperatures prior to welding but cool down should be done slowly from 400°C – 200°C. This will help reduce stresses induced during the cooling process, which could lead to cracking or warping of the material if cooled too quickly after welding or forming operations have been completed.


Machining aluminum 6201 can be done using standard machine tools with very few modifications needed depending on the application; however, some modifications may be necessary if using a CNC machine tool due to the flexibility of CNC programming software. The cutting speeds should not exceed 500 m/min, while milling operations should ensure that they are conducted at no more than 350 m/min.


Welding aluminium6 201 is relatively easy when done correctly; however, proper preparation must be taken prior to beginning any welding operations, such as proper joint design, joint preparation, filler metal selection, preheating, interposes cleaning etc. In addition, TIG and MIG welding techniques are preferred over arc welding techniques as these provide better control over the weld pool with less chance for distortion resulting from thermal gradients created during the process.


As you can see from this article, aluminum alloy 6201 is an extremely versatile alloy that offers superior corrosion resistance as well as excellent heat resistant properties making it suitable for use in various industries, including aerospace, automotive, marine etc. Furthermore, its machinability ratings are high, meaning that machining operations can be completed with relative ease, while its weldability ratings allow for strong welds with minimal distortion when performed properly. All these factors combine together to make aluminium alloy6 201 an ideal choice when looking for a reliable alloy solution suitable for many different applications.

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