2024 is one of the best known of the high strength aluminum alloys. With its high strength and excellent fatigue resistance, it is used to advantage on structures and parts where good strength-to-weight ratio is desired. It is readily machined to a high finish. It is readily formed in the annealed condition and may be subsequently heat treated. Arc or gas welding is generally not recommended, although this alloy may be spot, seam or flash welded. Since corrosion resistance is relatively low, 2024 is commonly used with an anodized finish or in clad form ("Alclad") with a thin surface layer of high purity aluminum. Applications: aircraft structural components, aircraft fittings, hardware, truck wheels and parts for the transportation industry.

2024-T4 2024-T351
AMS-QQ-A-225/6 AMS 4120 T4 AMS4119 T351
ASTM B211
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Metal & Alloy Bars

Aluminum Squares - Series 2024
Metal & Alloy Bars

Aluminum Squares - Series 2024
Metal & Alloy Bars

Aluminum Squares - Series 2024
Metal & Alloy Bars

Aluminum Squares - Series 2024
Metal & Alloy Bars

Aluminum Squares - Series 2024
Material N/A Aluminum
Shapeform N/A Squares
Series N/A 2024-T4 N/A 2024-T4 N/A 2024-T4 N/A 2024-T351 N/A 2024-T351
Grade N/A 2024
Temper N/A T4 N/A T4 N/A T4 N/A T351 N/A T351
Size N/A 3/16 inches N/A 1/4 inches N/A 3/8 inches N/A 1/2 inches N/A 5/8 inches
Size N/A 0.1875 inches4.7625 mm N/A 0.25 inches6.35 mm N/A 0.375 inches9.525 mm N/A 0.5 inches12.7 mm N/A 0.625 inches15.875 mm
Estimated Weight N/A 0.0422 lbs/ft0.0628005208 kg/m N/A 0.0750 lbs/ft0.1116123 kg/m N/A 0.1688 lbs/ft0.2512020832 kg/m N/A 0.3000 lbs/ft0.4464492 kg/m N/A 0.4688 lbs/ft0.6976512832 kg/m
Estimated Weight per 12' Bar N/A 0.506 lbs0.2295177544 kg N/A 0.900 lbs0.40823316 kg N/A 2.025 lbs0.91852461 kg N/A 3.600 lbs1.63293264 kg N/A 5.625 lbs2.55145725 kg
ASTM Specification N/A AMS 4120 AMS-QQ-A-225/6 ASTM B211 N/A AMS 4120 AMS-QQ-A-225/6 ASTM B211 N/A AMS 4120 AMS-QQ-A-225/6 ASTM B211 N/A AMS 4119 AMS-QQ-A-225/6 ASTM B211 N/A AMS 4119 AMS-QQ-A-225/6 ASTM B211
Ultimate Strength N/A 68 ksi
Yield Strength N/A 47 ksi
Elongation percent in 2 inches N/A 20
Hardness Brinnel Number
N/A 120
Ultimate Shearing Strength N/A 41 ksi
Fatigue Endurance Limit1 N/A 20 ksi
Modulus of Elasticity2 N/A 10.6 x 104 ksi
Resistance to Corrosion - General3 N/A D
Stress Corrosion Cracking4 N/A C
Workability (Cold)5 N/A C
Mechinability N/A B
Brazeability6 N/A D
Gas Weldability7 N/A C
Arc Weldability8 N/A B
Resistance Spot and Seam Weldability9 N/A B
Applications N/A Truck wheels, screw machine products, aircraft structures
Density N/A 0.100 lbs/in³
Specific Gravity N/A 2.78
  • 1 Based on 500,000.000 cycles of completely reversed stress using the R. R. Moore-type of machine and specimen.
  • 2 Average of tension and compression moduli. Compression modulus is about 2 percent greater than tension modulus.
  • 3 Ratings A through E are relative ratings in decreasing order of merit, based on exposures to sodium chloride solution by intermittent spraying or immersion. Alloys with A and B ratings can be used in industrial and seacoast atmospheres without protection. Alloys with C, D and E ratings generally should be protected at least on faying surfaces.
    In relatively thick sections, the rating would be E
  • 4 Stress-corrosion cracking ratings are based on service experience and on laboratory tests of specimens exposed to the 3.5% sodium chloride alternate immersion test.
  • 5 Ratings A through D for Workability (cold), and A through E for Machinability, are relative ratings in decreasing order of merit.
  • 6 Ratings A through D for Weldability and Brazeability are relative ratings.
  • 7 A = Generally weldable by all commercial procedures and methods.
    B = Weldable with special techniques or for specific applications that justify preliminary trials or testing to develop welding procedure and weld performance.
    C = Limited weldability because of crack sensitivity or loss in resistance to corrosion and mechanical properties.
  • 8 A = Generally weldable by all commercial procedures and methods.
    B = Weldable with special techniques or for specific applications that justify preliminary trials or testing to develop welding procedure and weld performance.
    C = Limited weldability because of crack sensitivity or loss in resistance to corrosion and mechanical properties.
  • 9 A = Generally weldable by all commercial procedures and methods.
    B = Weldable with special techniques or for specific applications that justify preliminary trials or testing to develop welding procedure and weld performance.
    C = Limited weldability because of crack sensitivity or loss in resistance to corrosion and mechanical properties.