3A21 Aluminum Plate

3A21 aluminum plate is an Al-Mn alloy. It is a widely used anti-rust aluminum with good corrosion resistance and good weldability. It is mainly used for applications requiring high plasticity and good weldability. And it usually works in liquid or gas media.


3A21 aluminum alloy, also known as A921 aluminum alloy, is an aluminum alloy material whose main component includes aluminum and a small amount of other alloy elements such as manganese, copper, chromium, and Zinc. 3A21 aluminum plate has good tensile strength and yield strength and can meet applications with various strength requirements. 3A21 aluminum alloy has good corrosion resistance and can be used for a long time in humid and corrosive environments without rusting easily. Besides, 3A21 aluminum plate can be subjected to various surface treatments, such as anodizing, spraying, chrome plating, etc., to increase its surface hardness and decoration. Another thing that makes 3A21 aluminum plate a favorable option is aluminum alloy is light in weight and low in density compared to other metals. It is an ideal lightweight material and is suitable for product designs that require light weight.


Diameter20-3000mm or customized
Length100-12000mm or customized
Thickness0.1-120mm or customized
CertificateISO, SGS, BV
StandardJIS, AISI, ASTM, GB, DIN, EN, etc.
Brand1000 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, 5A05, etc.
6000 Series: 6061, 6063, 6082, 6A02, etc.
7000 Series: 7050, 7475, 7075, etc.
8000 Series: 8A06, 8011, 8090, etc.
SurfaceCoating, Embossing, Drawing, Polishing, Anodizing, etc.
OEM ServicePunching, Cutting special size, Making flat surface, Surface treatment, etc.
Delivery TimeReceived 30% after deposit 7-15 working days
ApplicationConstruction, Shipbuilding, Decoration, Industry, Manufacturing, Machinery, Hardware and other fields
SampleFree Offers Sample
PackagingStrapping, Plastic bag, Film, Wooden pallet Standard seaworthy export packing or according to customer requirement
Product Parameters
AlloySiFeCuMnMgCrZnTiOthers: EachOthers: TotalAl: Min.
11000.95 0.95 0.05~
20170.2~ – 95.5
Chemical Composition
Tensile Strength (MPa)Test Stress (MPa)Elongation Rate (%)Hardness(HB)
Mechanical Properties
Density (Kg/m³)Melting Point (°C)Modulus of Elasticity (GPa)Thermal Conductivity (W/m.K)
Physical Performance
BrandAnnealing State
1xxx: 1050, 1050A, 1060, 1100O, H12, H14, H16, H18, H22, H24, H26, H28, H111
3xxx: 3003, 3004, 3005, 3105O, H12, H14, H16, H18, H22, H24, H26, H28, H111
5xxx: 5005, 5052, 5754, 5083, 5086, 5182, 5049, 5251, 5454O, H22, H24, H26, H28, H32, H34, H36, H38, H111
6xxx: 6061, 6082T4, T6, T451, T651
2xxx: 2024T3, T351, T4
7xxx: 7075T6, T651
Annealing State
Application AreaUses
Food PackagingBeverage can ends, cans, bottle caps, etc.
BuildingCurtain walls, cladding, suspended ceilings, thermal insulation, venetian blinds, etc.
TransportationAuto parts, passenger car bodies, aviation ships and air cargo containers.
Electronic EquipmentElectrical appliances, communication equipment, PC Plate drilling guide, lighting and heat dissipation materials, etc.
Consumer GoodsUmbrellas, cooking utensils, sports equipment, etc.
OtherMilitary, color-coated aluminum plate
Scope of Application


We have complete testing equipment and strong technical force. The company has advanced production equipment, equipped with key equipment such as pressing machines, large heat treatment furnaces, beveling machines, sawing machines, large sandblasting machines, and various testing instruments.


Our products are processed by professional technicians, and each product is carefully screened before shipment. We′re pleased to get your Inquiry and we will come back to as soon as possible.


We provide products with competitive prices based on good quality and schedule each shipment on time. We′re pleased to get your Inquiry and we will come back to as soon as possible.


Our main manufactures are stainless steel, galvanized steel, carbon steel and etc. That apply to engineering, coal mine, textile, electric power, boiler, machinery, military industry and other fields.

Marine Exploration
Electric Field
Boiler Field
Textile Field
The issues you care about

Yes, we could provide the free samples on conditions it is available in stocks, however, the transportation fee is borne by buyer.

Each piece of products is manufactured by certified workshops, inspected piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.

We accept third-party inspections such as SGS, V-trust, TUV, DNV, etc.

Yes, we could make custom products according to your specific requirements.

Generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers’ requirement.

30% T/T in advance, the balance 70% before delivery. We will show you the photos of products and package before you pay the balance.


For stocks, we could transport the goods to loading port within 7 – 15 days after we received your deposit. For production period, it usually takes about 15 days-30 days after receiving the deposit.

Our company has the ability to supply large projects and offers excellent preferential policies for large orders.

You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.

Under normal circumstances, we ship from Shenzhen, Shanghai, Tianjin, Qingdao, Ningbo ports, you can choose other ports according to your needs.

Of course, we welcome customers from all over the world to visit our factory. However, some of the plants are not open to the public.

In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry during the next working day.


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Delivery within agreed time


Shipping worldwide


Lifetime service