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 3A21 Aluminum round sheet

 antirust aluminium alloy

  (Old brand:LF21)

hot-sale product:
3A21-OAluminum round sheet
3A21-H24Aluminum round sheet
3A21-H112Aluminum round sheet
Sales hotline: +86 13021753983
3A21 aluminum round sheet type 3A21 Production Standard 3A21 Supply Status
  Bright aluminum round sheet   GBnational standard   O
  Film coated aluminum round sheet   GJBNational Military Standard   H112
  Pre stretched aluminum round sheet   GBNMilitary standard   H14
  Ultra wide aluminum round sheet   ENeuropean standard   H24
  Extra thick aluminum round sheet   ASTMAmerican Standard   H18


3A21 Characteristics

3A21 characteristic


image.png  non-heat-treatable alloy

image.png  antirust

image.png  processability

image.png  plasticity

image.png  weldability

image.png  Not easily deformed

image.png  corrosion resistance



Sales hotline: +86 13021753983




3A21 Aluminum round sheet

3A21 Aluminum round sheet


Thickness: 0.3-10mm diameter Φ 100 to 1250mm can be processed

Quality advantages: high smoothness, flatness, and precision

Services provided: lamination, retail, cutting, export packaging, etc


Sales hotline: +86 13021753983



3A21 Chemical composition

3A21 Chemical composition


silicon Si:       ≤0.60

cutter Fe:      ≤0.70

copper Cu:     ≤0.20

manganese Mn:    1.0-1.6

magnesium Mg:    ≤0.05

chromium Cr:      ——

zinc Zn:     ≤0.10

titanium Ti:      ≤0.15

zirconium Zr:       ——

aluminium Al:      margin 


Sales hotline: +86 13021753983

3A21 Performance

3A21 Performance


tensile strengthRm/MPa: 120

yield strengthRp0.2/MPa: ——

Elongation rate%: 16%

hardness: ——

Thermal expansion coefficient(20-100°C)μm/m·k: ——

Melting point range(°C): ——

conductivity20°C(68°F)(%IACS): ——

resistivity20°C(68"F)Ωmm2/m: ——

density(20°C)(g/cm3): 2.75


Sales hotline: +86 13021753983


3A21 Aluminum round sheet application

3A21 Aluminum round sheet application


Aluminum round sheet are widely used in electronics, daily chemicals, medicine, education, and automotive accessories. Electrical appliances, insulation, mechanical manufacturing, automotive, aerospace, military, mold, construction, printing and other industries. Kitchenware products such as non stick pots, pressure cookers, and hardware products such as lampshades, water heater shells, and stretched tank bodies are among the most widely used aluminum alloy plate and strip deep processing products.


Sales hotline: +86 13021753983



Purchase process

Professional experience makes communication easier, focusing on quality makes products more competitive

  • 1.Sign a contract and reach a consensus
  • 2.Blanking inspection, packaging and shipping


Oversized inventory ensures quality

Years of production experience

From placing an order to shipping out of the warehouse, we undergo three rounds of quality inspection to ensure that the qualified rate of the finished product is above 100%. We have a large amount of inventory and can provide customers with sufficient supply, so that they no longer worry about the crisis of out of stock or out of stock.

Timely delivery to save costs

Source manufacturer, customizable as needed

We promise that after the customer places an order, the spot products will be shipped on the same day. Yangdong Aluminum Industry is committed to providing high-quality products and satisfactory products to customers both domestically and internationally.

Featured service experience

Kind customer service team hotline to serve you

We promise that for every order, Yangdong Aluminum will promptly track and ensure that customers can receive goods safely, constantly listen to their opinions and suggestions, and reflect on our own problems. Make customers feel comfortable and at ease.