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
Screw Machine Stock Sizes Under 5/8" Supplied in T4
AMS-QQ-A-225/6 (6 1/2" max) AMS 4120
ASTM B211 UNS A92024
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Metal & Alloy Round Bars

Aluminum Rounds - Series 2024
Metal & Alloy Round Bars

Aluminum Rounds - Series 2024
Metal & Alloy Round Bars

Aluminum Rounds - Series 2024
Metal & Alloy Round Bars

Aluminum Rounds - Series 2024
Metal & Alloy Round Bars

Aluminum Rounds - Series 2024
Material N/A Aluminum
Shapeform N/A Round
Series N/A 2024-T4
Grade N/A 2024
Temper N/A T4
Diameter N/A 1/8 inches N/A 3/16 inches N/A 1/4 inches N/A 5/16 inches N/A 3/8 inches
Diameter N/A 0.125 inches3.175 mm N/A 0.1875 inches4.7625 mm N/A 0.25 inches6.35 mm N/A 0.3125 inches7.9375 mm N/A 0.375 inches9.525 mm
Estimated Weight N/A 0.0150 lbs/ft0.022323 kg/m N/A 0.033 lbs/ft0.0491106 kg/m N/A 0.0590 lbs/ft0.0878038 kg/m N/A 0.092 lbs/ft0.1369144 kg/m N/A 0.133 lbs/ft0.1979306 kg/m
Estimated Weight per 12' Bar N/A 0.177 lbs0.0802858548 kg N/A 0.398 lbs0.1805297752 kg N/A 0.707 lbs0.3206898268 kg N/A 1.104 lbs0.5007660096 kg N/A 1.590 lbs0.721211916 kg
ASTM Specification N/A AMS 4120 AMS-QQ-A-225/6 ASTM B211 UNS A92024
Ultimate Strength N/A 68 ksi
Yield Strength N/A 47 ksi
Elongation percent in 2 inches N/A 19
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.
    Inrelatively thick sections, 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.