3A21 aluminum alloy is a typical Al-Mn series wrought aluminum alloy, known for its good corrosion resistance, weldability, and plasticity. Compared to the 1035 alloy, it has comparable corrosion resistance, and its weldability makes it suitable for gas welding, arc welding, and spot welding.
3A21 aluminum tubing exhibits good deformability in both cold and hot working conditions, though its mechanical properties are relatively low. Strength is typically enhanced through cold working. Standing out for its excellent formability and corrosion resistance, 3A21 aluminum tubing is a versatile choice, whether used for oil tanks, gasoline or lubricant conduits, or electrical projects.
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Popular Products of 3A21 Aluminum Tube
3A21 Aluminum Round Tube- Features: Uniform strength and excellent compression resistance.
- Outer Diameter: 10mm - 200mm
- Wall Thickness: 0.8mm - 10mm
- Common Uses: Transport pipelines for oil, water, and natural gas, especially suitable for chemical transport pipes and cooling systems.
3A21 Aluminum Square Tube- Features: Sturdy structure, ideal for corner support.
- Dimensions: 10mm x 10mm - 200mm x 200mm
- Wall Thickness: 1.2mm - 12mm
- Common Uses: Construction scaffolding, structural frames, and mechanical support components.
3A21 Aluminum Round Tube- Features: High structural strength and space-saving design.
- Diameter: 15mm - 180mm
- Wall Thickness: 1.0mm - 8mm
- Common Uses: Building decorations, automotive exhaust systems, providing effective exhaust flow.
3A21 Extruded Seamless Tube- Features: High-strength seamless structure.
- Outer Diameter: 10mm - 420mm
- Common Uses: Hydraulic systems and pneumatic devices, ensuring reliability and stability under high pressure.
3A21 Aluminum Coil Tube- Features: Excellent flexibility and corrosion resistance.
- Diameter: 5mm - 20mm
- Wall Thickness: 0.5mm - 3mm
- Common Uses: Refrigeration equipment, air conditioning systems, and other flexible pipeline applications.
3A21 Micro-Channel Aluminum Flat Tube- Features: High thermal conductivity and compact structure.
- Dimensions: 10mm x 2mm - 50mm x 10mm
- Wall Thickness: 0.3mm - 3mm
- Common Uses: Automotive radiators, air conditioning condensers, and industrial heat exchangers for efficient heat transfer.
3A21 Aluminum Bus Tube- Features: High electrical conductivity and lightweight.
- Common Uses: Power distribution systems, ensuring low loss and efficient power transmission.
Mastar Metal - Premium Aluminum Tube Supplier
- Competitive Pricing: Supporting both retail and bulk purchases for metal distributors, we offer discounts and rebate policies for B2B clients. Pricing is transparent, and we ensure a price advantage for tubes of the same quality.
- Timely Delivery: With tens of thousands of tons in inventory, standard sizes can be matched to stock for quick shipment. Advanced equipment and a professional team shorten delivery times, providing efficient logistics for on-time delivery.
- Premium Products: Using high-quality aluminum billets produced through reverse extrusion processes, complemented by excellent heat treatment techniques, we optimize product strength and ductility, ensuring uniform cooling and annealing for high tensile strength and superior performance.
- Comprehensive Quality Inspection: We strictly enforce multiple inspection procedures, including tensile strength, elongation performance, ultrasonic testing, and metallographic testing to ensure that aluminum bars meet AMS, EN, NADCAP, and other certification standards.
- Customer Service: Offering comprehensive after-sales service to address customer concerns, our experienced technical team provides professional consultation and support, establishing a robust customer service system for a superior service experience.
Advantages of 3A21 Aluminum Tube
1.Rust-Resistant Aluminum: As an aluminum-manganese series alloy, 3A21 has excellent rust and corrosion resistance, especially suitable for environments in prolonged contact with moisture or chemicals.
2.Non-Heat-Treatable Hardening and High Ductility: 3A21 aluminum has high ductility in the annealed state, moderate ductility when semi-cold worked, and lower ductility when cold-work hardened. It is easy to cold work and can be shaped to custom specifications, suitable for manufacturing various tube shapes.
3.Ease of Processing: 3A21 aluminum is convenient for custom solutions across industries, though its machinability may be lower for certain specific applications.
4.Suitable for Anodizing: 3A21 aluminum alloy can be anodized to enhance corrosion resistance and provide an aesthetically pleasing surface, making it particularly suitable for architectural and exposed applications.
5.Balance of Quality and Economy: 3A21 aluminum tube strikes an excellent balance between quality and cost-effectiveness, ideal for moderate-load applications. Its mechanical properties can be enhanced through cold working, making it suitable for applications requiring high ductility and strength, providing outstanding value for money.
Optimal Application Fields for 3A21 Aluminum Tube
Fuel Conduit Field
With high plasticity, good weldability, and corrosion resistance, 3A21 aluminum tube is suitable for use in fuel tanks, gasoline pipes, and lubricant conduits, widely applied in the automotive and transportation industries.
Heat Exchanger Field
3A21 aluminum tube is widely used in heat exchangers due to its corrosion resistance and thermal conductivity, ideal for environments where efficient heat management of hot and cold fluids is required.
Industrial Field
In the industrial sector, 3A21 aluminum tube is used for manufacturing various low-load components, such as liquid containers and light-load parts. Its deformation capabilities in both cold and hot states make it an ideal material for pressure vessels, storage devices, and chemical equipment.
Electrical Field
Due to its excellent conductivity, 3A21 aluminum tube is widely used in power construction projects, power plants, and substations as aluminum bus tubes.
3A21 aluminum tube procurement guide
1.Specifications and Dimensions
Choose the appropriate type and size of aluminum bar according to specific application requirements to ensure it meets design specifications and usage scenarios.
2.Quality Standards and Documentation Support
Ensure that the aluminum alloy bars purchased comply with international quality standards, such as ASTM B221, to guarantee that the material's mechanical properties and corrosion resistance meet project requirements. Msatar can provide detailed quality inspection reports, including raw material certificates, laboratory test reports, fumigation reports, specification guides, commercial invoices, and guarantees, ensuring transparency and traceability for each batch of products.
3.Inventory and Delivery Time
Check the supplier's inventory and delivery cycle to ensure materials arrive on time without impacting project schedules.
4.Export Packaging
In international shipping, packaging quality directly affects whether goods will suffer rust, corrosion, scratches, deformation, or other damages during transit. Msatar has extensive experience in export packaging, providing safe and reliable packaging solutions to thousands of companies. Using fumigated wooden boxes, wooden pallets, and other high-quality packaging materials, our packaging damage rate is only one-third of the industry average.
5.Loading Solutions
Our experienced order-following team can offer flexible loading solutions, including options for 20/40-foot containers or bulk shipments. Regardless of your cargo's specifications or shapes, we can customize a refined loading plan that saves an average of 15% in container space, effectively reducing your logistics costs.
Product Guide of 3A21 aluminum tube
Chemical composition of 3A21 aluminum tube
| Element | 3A21 |
| Si | 0.60 |
| Fe | 0.70 |
| Cu | 0.20 |
| Mn | 1.0-1.6 |
| Mg | 0.05 |
| Cr | - |
| Ni | - |
| Zn | 0.10 |
| Ti | 0.10 |
| Zr | - |
| Others (Each) | 0.05 |
| Others (Total) | 0.15 |
| Al | Rem |
Physical properties of 3A21 aluminum tube
| Properties | Value |
| Density | 2.70 g/cm³ |
| Melting point | 605°C |
| Thermal conductivity | 188 W/m·K |
| Coefficient of thermal expansion | 24µm/m·°C |
Mechanical properties of 3A21 extrusion aluminum tube
| Properties | O/H112 |
| Tensile strength Rm/MPa | 120-160 |
| Yield strength Rp0.2/MPa | 85 |
| Elongation | 20% |
What is the Difference Between 3003 and 3A21 Aluminum Alloys?
Answer: Both 3003 and 3A21 are aluminum-manganese series alloys, but 3A21 offers relatively higher plasticity and corrosion resistance, making it especially suitable for applications requiring high formability and rust resistance. Although 3003 has slightly higher strength, both alloys have good machinability in practice. However, 3A21 is more suitable for environments needing cold forming and corrosion resistance.
Why is 3A21 Considered a Typical Rust-Resistant Aluminum?
Answer: The 3A21 aluminum alloy contains a high amount of manganese, granting it excellent corrosion resistance, particularly in marine and acidic environments. Therefore, 3A21 is widely used in applications requiring high corrosion resistance, such as liquid containers, marine equipment, and outdoor facilities, earning it the designation of a typical rust-resistant aluminum.
Why is 3A21 Suitable for Fuel Tanks or Fuel Lines?
Answer: 3A21 aluminum alloy has good corrosion resistance and high plasticity, making it ideal for use in fuel tanks and fuel conduits. It can withstand the corrosive effects of fuels and lubricants while maintaining high ductility during forming to accommodate complex structural requirements. Additionally, its good weldability ensures airtightness and structural integrity for fuel tanks and conduits.