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Chinese Standard 3000 Series 3A21 Aluminum Alloy Plate For Engineering And Manufacturing
Chinese Standard 3000 Series 3A21 aluminum alloy plate (also known as LF21) is a high-performance Al-Mn based anti-rust aluminum compliant with GB/T 3190-2020 standards, equivalent to international grade 3003. As the most widely used anti-rust aluminum in the 3xxx series, it features a balanced combination of excellent corrosion resistance, superior formability, reliable weldability and moderate strength, making it a preferred material for engineering and manufacturing projects with strict requirements for lightweight and durability.
Product Name
3A21 Aluminum Alloy Plate
Keyword
Aluminum Sheet 2.0mm Thick
Technique
Cold Rolled
Certification
ISO 9001
Standard
ASTM
Grade
3000 Series
Type
Plate
Application
Decoration, Automotive Field, Marine industry
Delivery Time
8 ~ 14 days
Material
3A21
Size
Customized
Customized support
OEM, ODM
Model Number
3A21
Shape
Square
Place of Origin
Other
Advantage
High Corrosion Resistance
Material Status
Large stock or fast new production
Package
Standard Package
Processing Service
Bending, Decoiling, Welding, Punching, Cutting
Payment
T/T 30% Deposit + 70% Advance
Key Features & Advantages
Excellent Corrosion Resistance: The dense oxide film naturally formed on the surface provides strong resistance to atmospheric, freshwater, seawater, organic acids and neutral salt solutions, ideal for humid and corrosive working environments.
Superior Processing Performance:
Formability: High plasticity in O-state (annealed), suitable for deep drawing, bending and stamping to create complex-shaped components.
Weldability: Excellent compatibility with argon arc welding and resistance welding, ensuring firm and reliable welded joints.
Lightweight: Density of 2.7g/cm³, approximately 1/3 of steel, effectively reducing structural weight and transportation costs.
Moderate & Reliable Mechanical Properties:
Tensile Strength: 120-160 MPa
Yield Strength: ≥85 MPa
Elongation: ≥20% (O-state)
Strength can be enhanced via cold working (H14/H24/H18 states) to meet diverse load requirements.
Cost-Effective & Eco-Friendly: Lower cost than heat-treatable aluminum alloys; 100% recyclable, aligning with green manufacturing and low-carbon development trends.
Common Grades & States
O (Annealed): Softest state, optimal ductility for complex forming.
H14/H24 (Half-Hard): Balanced strength and ductility for general structural use.
H18/H28 (Full-Hard): Highest strength for load-bearing components.
Custom Service: Tailored sizes, states and surface treatments available
Quality Assurance
Our 3A21 aluminum alloy plates are strictly produced in accordance with Chinese GB standards, with complete quality certificates (ISO, SGS) and full-process quality control to ensure compliance with international standards and customer requirements.
Why Choose Our 3A21 Aluminum Alloy Plates?
Standard Compliance: 100% meets Chinese GB/T 3190 standards.
Stable Quality: Precise component control and advanced production technology.
Versatile Performance: Balanced corrosion resistance, formability and strength.
Custom Solutions: Professional technical support and tailored services.
Competitive Price: Factory direct sales with reliable quality assurance.
Ideal for engineering and manufacturing projects requiring lightweight, corrosion-resistant and cost-effective aluminum materials!
