3A21 Aluminum Sheet

3A21 Aluminum Sheet

Alloy model:

3A21 aluminum alloy


0.10 mm – 350 mm


3 mm – 2600 mm


O~H112, T3~T8, T351~851


3 tons


Ready stock: 7~10 days
Future goods: 15~30 days

Surface treatment:

Mill Finish, Coated, Anodized, Mirror, Embossed, Checkered, etc.

Composition and Properties

The 3a21 aluminum sheet is made from a combination of aluminum, magnesium, and silicon, which makes it strong, durable, and corrosion-resistant. It has a high strength-to-weight ratio, which makes it ideal for applications where weight is a critical factor. The sheet is also highly resistant to heat and can withstand high temperatures without deforming or losing its strength.

Sizes and Dimensions

The 3a21 aluminum sheet has a thickness range of 0.1mm to 350mm, and a width range of 20mm to 2650mm. It is available in various sizes and dimensions to suit different application requirements. The sheet is also available in different finishes, including polished, brushed, and anodized.

Corrosion Resistance

One of the main features of this aluminum sheet is its resistance to corrosion. It is suitable for use in marine and offshore environments where exposure to saltwater and other corrosive elements is common. The sheet is also resistant to oxidation and can withstand exposure to harsh chemicals.

Weldability and Formability

The 3a21 aluminum sheet has excellent weldability, which makes it easy to join using various welding techniques. It is also easy to form and shape, which allows it to be used in a wide range of applications, including roofing, cladding, and signage. The sheet can be bent, cut, and shaped to meet the specific requirements of different applications.


  1. Aerospace: The 3a21 aluminum sheet is used in the manufacture of aircraft parts, including wings, fuselage, and structural components. Its high strength-to-weight ratio and corrosion resistance make it an ideal material for use in the aerospace industry.
  2. Automotive: The sheet is also used in the automotive industry for the manufacture of automobile frames, body panels, and other structural components. Its lightweight and high strength make it an ideal material for use in the manufacture of fuel-efficient vehicles.
  3. Construction: The 3a21 aluminum sheet is used in the construction industry for roofing, cladding, and facades. Its corrosion resistance and durability make it an ideal material for use in buildings that are located in harsh environments, such as coastal areas.
  4. Marine: The sheet is also used in the marine industry for the manufacture of boats, ships, and other marine equipment. Its corrosion resistance makes it suitable for use in saltwater environments.
  5. Industrial: The 3a21 aluminum sheet is used in the construction of industrial furnaces and ovens due to its high heat resistance. It is also used in the manufacture of heat exchangers, air conditioning systems, and other industrial equipment.
  6. Signage: The sheet is also used in the manufacture of outdoor signage due to its durability and weather resistance. It can be easily formed and shaped to meet the specific requirements of different signage applications.

Let us know how we can help you.

Frequently Asked Questions

Do you have products in stock?2023-02-09T03:37:43+00:00

There are 10000 tons stock for various size.plsease inform us what model you need, we will send stock details to you.

How long will it take to produce my order?2023-02-09T03:35:49+00:00

Our normal produce time is 7-25 working days, depending on your order.

Why should you buy from us?2023-02-09T03:34:42+00:00
1 – 20 years experience in aluminum industry.
2 – Source manufacturers, leading equipment, excellent team skills.
3 – Low price, fast delivery and excellent quality, good service.
4 – Professional technical solution.
Will our goods be damaged during the long-distance transport? How to avoid it?2023-02-09T03:34:11+00:00
No damage, we will affix a low viscosity protective film on the surface of the product, effectively avoid scratches, easy to
uncover when using, and will not leave stains on the surface.For long distance transportation we have professional experience,familiar with the packaging and arrangement of the goods, let the goods safely arrive at your destination.
How much will the shipping cost be?2023-02-09T03:33:33+00:00

This will depend on the size and weight of your order and the method of shipping.

Can you help me find the shipping company?2023-02-09T03:37:28+00:00

Of course, if you don’t work with a shipping company. We have a long-term cooperation of the transport team can provide you with lower prices, better service.

How can we guarantee quality?2023-02-09T09:57:43+00:00

1 – We can provide samples for free.We can send the samples by TNT, DHL, FEDEX, EMS, UPS or to your warehouse.
2 – Always a pre-production sample before mass production.

3 – Always final Inspection before shipment.
4 – Products meet ASTM(American standard), GB/T(national standard), EN AW(European standard);
5 – We can provide quality inspection certificate, ISO certificate.

Who are we?2023-02-09T03:21:31+00:00

Henan Yongsheng Aluminum Co., Ltd . is located in Gongyi City Industrial Cluster Area, Henan Province. The factory focuses on the production of aluminum products such as Aluminum Strip, Color Aluminum Coil/Sheet, Aluminum Sheet , Aluminum Coil, Embossed Aluminum Coil/Sheet, Mirror Aluminum Coil/Sheet.The factory covers an area of 100,000 square meters, has 476 employees, has 20 casting processing production lines,2 color coated aluminum coil production lines, 3 slitting production lines, 4 shearing production lines, 32 punch presses, 10 CNC lathes, 4 The embossed aluminum production line has an annual output of more than 200,000 tons,and exports account for more than 40%.


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