• 3A21 Aluminum plate
  • 3A21 Aluminum plate
  • 3A21 Aluminum plate
3A21 Aluminum plate

1. Competitive price and quality from our own factory

2. Approved by IS09001, CE, SGS every year

3. Best service with 24 hour's reply

4. Flexible payment with T/T,L/C

5. Quick delivery and standard exporting package

6.OEM/ODM

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Product specification and description

3A21 aluminum plate is a kind of widely used anti-rust aluminum, belonging to the Al-Mn series alloy. Its strength is not high, and its mechanical properties can not be improved by heat treatment, so cold working methods are often used to improve its strength and plasticity. In the annealed state, 3A21 aluminum plate has high plasticity, can be bent, stamping and other processing. In the semi-cold hardening, its plasticity is still good, can be stretched, bending and other processing. However, when cold hardening, its plasticity is low, and it needs to be processed carefully.

3A21 aluminum plate has good corrosion resistance and can adapt to wet environment. In addition, its weldability and machinability are also good. Because of these characteristics, 3A21 aluminum is widely used in the manufacture of various parts and components, such as fuel tanks, pipes, containers, rivets, etc.

In short, 3A21 aluminum sheet is an aluminum alloy material with excellent properties, which is suitable for various processing and manufacturing fields.
  Thickness:        0.1-400mm，etc              Length:   100-12000mm，or as required            
  Width:    20-3000mm，etc              Standard:   ASTM，AISI，JIS，GB， DIN，EN            
  Certification:  ISO, SGS，BV            
  Surface finish:  mill,bright,polished,hair line,brush,sand Blast,checkered,embossed,etching,etc            
  Grade:  1000 Series: 1050 1060 1070 1100 1200 1235 etc.            
  3000 Series: 3003 3004 3005 3104 3105 3A21 etc.            
  5000 Series: 5005 5052 5083 5086 5154 5182 5251 5754 etc.            
  6000 Series: 6061 6063 6082 6A02 etc.            
  7000 Series: 7050 7475 7075 etc.            
  Temper:   H12,H14,H16,H18,H20,H22,H24,H26,H28,H32,H36,H38,HO,H111,H112,H114,H116,H118,H321.            
  Payment Terms :  T/T, L/C at sight,West Union,D/P,D/A,Paypal              Loading port              any port in China            
  Packing:  standard export packing (inside:water proof paper,outside:steel covered with strips and pallets)            
  Container size:  20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
  40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
  40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
Inspection Of Steel Plate

Steel plate inspection is a multi-link, multi-faceted process designed to ensure the quality, performance and safety of steel plates. The following are the main steps and aspects of steel plate inspection:

Preparation work:

Confirm the specifications of the steel plate.

Ensure that the surface of the steel plate is clean and free of impurities such as oil, gravel and dust.

Maintain a suitable ambient temperature to avoid too high or too low temperature affecting the test results.

Appearance inspection:

Check whether the surface of the steel plate is smooth, without concave, convex, pocked and other defects.

Check the surface of the steel plate for scratches, cracks, cutting edges, etc.

Check the surface of the steel plate for bubbles, inclusions, blisters, spots and other defects.

Check whether the surface of the steel plate is coated, painted, anti-rust layer and other surface materials.

Size detection:

By measuring the length, width, thickness and other dimensions of the steel plate, determine whether the size of the steel plate meets the requirements. Use a ruler, protractor and other tools for measurement to ensure the accuracy of the steel plate size.

Chemical composition test:

The content of elements contained in the steel plate is determined by sampling experiments. Use chemical analysis methods, such as spectral analysis, wet analysis, etc., to detect the content of various chemical elements in the steel plate to ensure that the steel plate meets the chemical composition requirements of a specific grade.

Mechanical properties test:

Including strength, extensibility, impact toughness and other parameters of the test. The tensile test and impact test are used to evaluate whether the mechanical properties of steel plate meet the standard requirements. These tests can determine the steel plate's maximum load bearing capacity, impact resistance and other important characteristics.

Defect detection:

Non-destructive testing methods such as X-ray testing, ultrasonic testing, magnetic particle testing, etc. are used to find cracks, pores, slag inclusion and other defects in steel plates. These methods help identify problems early and fix them.

Records and reports:

Record all test results in detail and write test report. This helps to track the quality of the steel plate and provide supporting documentation when required.

The inspection of steel plates is a rigorous process that requires professional equipment and personnel to perform. Through this series of tests, we can ensure the safe and stable use of steel plates in engineering projects. At the same time, the strict implementation of steel plate testing standards is crucial to ensure engineering quality, and is of great significance for improving the quality of steel plate products and promoting industrial development.

Material introduction

Aluminum is a light, malleable, silvery-white metal with many excellent properties. It has a low density of only about 2.7 g/cm³ and is therefore a lightweight material. Aluminum has good thermal and electrical conductivity and can be used to manufacture a variety of high-precision parts and components. In addition, aluminum also has good corrosion resistance and can remain stable in a variety of environments.


Aluminum has a melting point of 660 ° C and a boiling point of 2327 ° C, so it can be widely used in various industrial fields. Aluminum is an important structural material that can be used to manufacture a variety of aircraft, cars, ships and other vehicles. In addition, aluminum can also be used to manufacture various building structures, plumbing systems, etc.


The chemical properties of aluminum are relatively stable, but oxidation reactions may occur under certain circumstances. In daily life, aluminum products are very common, such as aluminum cans, aluminum bottle caps and so on. These products have been specially treated during the production process to ensure that they have good stability and durability during use.


Although aluminum has many advantages, excessive intake of aluminum may also have negative effects on human health. Therefore, when using aluminum products, attention should be paid to controlling the amount of use to avoid long-term exposure to or use of high-concentration aluminum products. At the same time, effective measures should also be taken in the production process to reduce the impact of aluminum on the environment.


In short, aluminum is an important metal material and has a wide range of application prospects. In the process of use, attention should be paid to controlling the amount and mode of use to avoid adverse effects on human health and the environment.

Warehouse display

We have a large steel product warehouse with a large inventory covering a wide range of specifications and types of products. Whatever specifications you need, we can provide them quickly, ensuring that your project is not affected by material shortages. Our product inventory is updated in real time, with new products coming into stock every day. This means that even in the case of high demand, we can guarantee a stable supply and avoid the risk of running out of stock. Our warehouse facilities are complete, with a sound storage and logistics system. This allows us to quickly complete the product entry, storage and exit work, ensuring that your ordered products can be delivered in a timely manner.

Stainless steel warehouse
Carbon steel warehouse
Alloy warehouse
Aluminum warehouse
Other product warehouse

Product application

Each batch of our products will be subjected to strict quality testing before leaving the warehouse, we can also accept your designated third party testing agency for quality inspection and quality certificate, to ensure that all products do not have quality problems and can be perfectly applied to various fields.

Sewer pipe
Pipeline transportation
High pressure pipeline
Agricultural irrigation
Condenser copper tube
Water supply pipeline

Customer visit

Customer's visit is an important part of our long-term cooperative relationship, every customer's visit is our driving force forward, we value every communication with you. We are very welcome and look forward to your frequent visit, with us to explore more cooperation opportunities, we are committed to provide you with one-stop service, whether it is product consultation, technical support or business negotiations, we will go all out, in order to ensure that your visit is smooth, we have prepared all the necessary support and service, ready to meet your arrival.

Recommended product

In order to ensure the supply of sufficient goods for customers at all times, in addition to independent production of goods, we also maintain close cooperation with major manufacturers at home and abroad, if we do need to order their goods, then we will carry out strict quality testing of this batch of goods to ensure that there is no problem before delivery to customers.

FAQ

Are you trading company or manufacturer ?

We are specialized in the production and processing of various steel products suppliers, have their own independent plant and production equipment

Do you provide samples ? Is it free or extra ?

We can provide samples to you for free, but the cost of express delivery will be borne by you.

Do you support customization ?

Yes, we have a full stock of products with a full range of models and a working production line. If you don't have what you want, we can customize it.

How long is your delivery time?

It takes around 3-5 days for the regular models, and 7 to 10 working days for the special sizes and processing. It is based on the order quantity and requirement.

Do you accept third party testing ?

Yes, we fully accept the quality inspection of the third party inspection institutions. We attach great importance to the reliability of product quality

What are the advantages of your company?

First of all, we have an absolute advantage in price. Secondly, the quality of products is also strictly controlled.

Contact us

If you have any questions, please contact us immediately and we will respond to you as quickly as possible

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