2024 Aluminum Bar (AA2024/UNS A92024)
2024 aluminum bar is a high-strength, heat-treatable Al-Cu-Mg alloy (commonly known as "aircraft alloy") renowned for its exceptional strength-to-weight ratio, fatigue resistance, and machinability. It's equivalent to Chinese grade 2A12 and European grade EN AW-2024 (Al Cu4Mg1).
1. Chemical Composition (Typical)
| Element |
Content (%) |
Element |
Content (%) |
| Aluminum (Al) |
93.5-95.5 |
Iron (Fe) |
≤0.50 |
| Copper (Cu) |
3.8-4.9 |
Silicon (Si) |
≤0.50 |
| Magnesium (Mg) |
1.2-1.8 |
Zinc (Zn) |
≤0.25 |
| Manganese (Mn) |
0.3-0.9 |
Titanium (Ti) |
≤0.15 |
| Others |
≤0.15 each, ≤0.50 total |
|
|
Source: AMS 4120, ASTM B211, EN 573
2. Mechanical Properties (Key Tempers)
| Property |
T3/T351 |
T4 |
T6 |
T851 |
| Tensile Strength |
460-470 MPa |
440-460 MPa |
480-520 MPa |
470-500 MPa |
| Yield Strength (0.2%) |
325-345 MPa |
220-240 MPa |
400-430 MPa |
380-410 MPa |
| Elongation |
10-12% |
18-19% |
6-8% |
8-10% |
| Hardness (HB) |
120-130 |
110-120 |
130-140 |
125-135 |
| Fatigue Strength |
~105 MPa |
~100 MPa |
~110 MPa |
~105 MPa |
3. Common Tempers & Characteristics
T3/T351: Solution heat-treated, cold worked, naturally aged. Balances high strength and good formability; ideal for aircraft fittings and heavy-duty machine parts.
T4: Solution heat-treated and naturally aged. Offers excellent machinability and weldability; used for structural components requiring moderate strength.
T6: Solution heat-treated and artificially aged. Highest strength but reduced ductility; suitable for high-stress applications.
T851: Solution heat-treated, stretched, artificially aged. Superior stress corrosion cracking resistance and dimensional stability; preferred for precision aerospace components.
4. Product Forms & Specifications
| Form |
Sizes |
Standard Specifications |
| Round Bar |
3-500 mm diameter |
ASTM B211 (cold-finished), ASTM B221 (extruded), AMS 4120, AMS QQ-A-225/6 |
| Square/Hex Bar |
Custom sizes |
EN 485, AMS 4152 |
| Rectangular Bar |
Custom profiles |
EN 573, ASTM B221 |
5. Key Applications
Aerospace: Aircraft structures, wing ribs, fuselage frames, landing gear components, rivets
Defense: Military vehicles, weapon systems, armor plating
Automotive: High-performance engine parts, suspension components, racing chassis
Industrial: Heavy-duty machine parts, precision tools, hydraulic cylinders, structural supports
Marine: Boat hulls, masts, rigging components (with proper corrosion protection)
Advantages & Limitations
Advantages:
· Exceptional strength-to-weight ratio (stronger than 2017/2014 alloys)
· Superior fatigue resistance for cyclic loading applications
· Good machinability for precision manufacturing
· Heat-treatable for tailored properties
Limitations:
· Lower corrosion resistance than 6xxx/7xxx series (requires protective coating/anodizing)
· Poor resistance to stress corrosion cracking in T3/T4 tempers (improved in T851)
· Welding requires special techniques (avoid gas welding due to potential cracking)
7. Processing & Handling Tips
Machining: Use sharp tools, coolant, and moderate cutting speeds for best results
Welding: Spot welding preferred; avoid gas welding. Use 2319 or 4043 filler metal for TIG/MIG
Surface Treatment: Anodizing, painting, or powder coating recommended for corrosion protection
Heat Treatment: Solution treat at 493-503°C, quench in water, age naturally (T4) or artificially (T6/T8)
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A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
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30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
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Q5: Can you provide sample?
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2024 Aluminum Bar (AA2024/UNS A92024)
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