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2024

Cold Drawn/Finished (CF) / AlCu4Mg1 (Soğuk Çekim) / 2024 / T851

Chemical Properties % Value
Silicon (Si)0,00 - 0,50
Chromium (Cr)0,00 - 0,10
Manganese (Mn)0,30 - 0,90
Magnesium (Mg)1,20 - 1,80
Copper (Cu)3,80 - 4,90
Titanium (Ti)0,00 - 0,15
Iron (Fe)0,00 - 0,50
Zinc (Zn)0,00 - 0,25
Aluminium (Al)Balance
Physical Properties Value
Density2.78 g/cm³
Melting Point502 °C
Thermal Expansion22.9 µm/m.°C
Modulus of Elasticity73.1 GPa
Thermal Conductivity151 W/m.K
Electrical Resistivity30% IACS
Mechanical Properties Value
Proof Strength427 MPa
Yield Strength 455 MPa
Shear Strength296 MPa
Elongation A50 mm7%
Hardness128 HB

The cold-drawn 2024 T851 aluminum alloy is known for its high strength, durability, and excellent fatigue resistance, making it ideal for demanding applications in the aerospace, defense, and automotive sectors. Commonly used in load-bearing parts and high-vibration environments, 2024 T851 offers reliable performance under stress. Its copper content provides exceptional strength, although it does reduce natural corrosion resistance; therefore, additional protective coatings or anodizing may be necessary in challenging environments. The alloy is suitable for anodizing, which enhances surface durability, improves corrosion resistance, and adds an aesthetic finish.

Weldability of 2024 T851 is limited, so mechanical fastening methods such as riveting or bolting are typically used. The cold-drawing process increases the alloy’s formability and bendability, allowing for use in complex shapes. It is particularly advantageous in high-vibration settings, making it a preferred choice for moving parts or components where fatigue resistance is critical. Its key benefits include high strength, machinability, bendability, and anodizing compatibility, while its main drawbacks are limited corrosion resistance and restricted weldability. These properties make 2024 T851 an ideal material for projects requiring durability, strength, and vibration resistance.

 

ALLOY DESIGNATIONS

Aluminium alloy 2024 T851 has similarities to the following standard designations and specifications:

Cold drawn round bar as: ASTM B211, AMS QQ-A-225/6, AMS 4339

Cold drawn seamless tube as: AMS 4087, WW-T-700/3, ASTM B210 

 

Choosing Factors for 2024 T851 

  • Strength: Good
  • Machining: Good
  • Weldability: Fair (Spot welding is the best choice)
  • Formability: Weak
  • Corrosion Resistance: Low
  • Heat Treating: Yes
 

Some Well-Known Applications for 2024 T851

In automotive inboard computer components,

Horizontal tail fittings,

Hydraulic connectors.

 

SUPPLIED FORMS

2024 T851 is supplied in round/flat bar and tube/ profile forms.

  • Flat/round bar
  • Tube/profile
DELIVERY:
Mechanical Properties
Thickness (mm) Proof Strength (Min.) Yield Strength (Min.) Elongation A50 mm %
over 6,35 up to & incl. 12,7 mm 400 MPa 460 MPa ≥%5
over 12,7 up to & incl. 25,4 mm 400 MPa 455 MPa ≥%5
over 25,43 up to & incl. 38,07 mm 395 MPa 455 MPa ≥%5