The 7021 T6 aluminum alloy is known for its high strength, excellent machinability, and good corrosion resistance. Belonging to the aluminum-zinc alloy class, this alloy is particularly used in aerospace, aviation, automotive, and structural applications requiring high performance. The T6 temper gives the alloy high durability and hardness through applied heat treatments. Its high strength-to-weight ratio makes this alloy a preferred material for heavy-load structural components.

The suitability of the 7021 T6 aluminum alloy for anodizing is limited. Its high zinc content hinders the formation of an effective oxide layer during the anodizing process, making protection through anodizing more difficult. Instead, other coating methods are generally used to protect the 7021 T6 alloy. In terms of weldability, the high zinc content requires careful handling during welding. By using proper welding techniques and filler materials, the risk of cracking during welding can be minimized.

In terms of bending and forming, the 7021 T6 aluminum alloy requires careful processing due to its high strength. However, with correct processing techniques, bending and forming operations can be performed successfully. Additionally, the 7021 T6 alloy can be used in high-vibration environments. Its high durability and elastic modulus make it suitable for engine components, chassis, and other vibration-prone parts.

Regarding corrosion resistance, the 7021 T6 aluminum alloy has limited corrosion resistance due to its high zinc content. However, corrosion resistance can be improved with appropriate coatings and surface treatments. The advantages of the 7021 T6 aluminum alloy include high strength, durability, and light weight, while its disadvantages include limited corrosion resistance and welding challenges.

MATERIAL COMPOSITION STANDARDS

7021 T6 is available according to the following standards:
• 7021 T6 Plate; ISO AlZn5.5Mg1.5, UNS A97021, ASTM B209
 

Characteristic Properties of 7021 T6: 

• Strength: High
• Machinability: Very Good
• Weldability: Low
• Formability: Poor
• Corrosion Resistance: Average
• Heat Treatment: Yes
   

Some Well-Known Applications of 7021 T6: 
In plastic injection molds,
In food processing machinery,
Also used in defense industry and robotic parts.
 

STOCK
We supply 7021 T6 in sheet form.

• Sheet/Plate