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, 202more4 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-T3 Bare
Interleaved and Stenciled
AMS-QQ-A-250/4 AMS 4037 less
2024-T3 Bare
Interleaved and Stenciled
AMS-QQ-A-250/4 AMS 4037 less
Unit of Measure
Specifications
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Typical Mechanical Properties
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Comparative Characteristics and Applications
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Aluminum Alloy Designations
Specifications
Material |
N/A Aluminum |
Shapeform |
N/A Sheets |
Series |
N/A 2024-T3 Bare |
Grade |
N/A 2024 |
Preparation |
N/A Interleaved and Stenciled |
Temper |
N/A T3 Bare |
Thickness |
N/A 0.160 inches4.064 mm |
Size |
N/A 48 x 144 |
Width |
N/A 48 |
Length |
N/A 144 |
Sheet Weight per Unit Area |
N/A 2.304 lbs/ft²11.248128 kg/m² |
Weight per Sheet |
N/A 110.59 lbs50.163 kg |
ASTM Specification |
N/A AMS 4037 AMS-QQ-A-250/4 |
Density |
N/A 0.100 lbs/in³ |
Specific Gravity |
N/A 2.78 |
Typical Mechanical Properties
Ultimate Strength |
N/A 70 ksi |
Yield Strength |
N/A 50 ksi |
Elongation percent in 2 inches |
N/A 18 |
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 106 ksi |
Comparative Characteristics and Applications
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 |
Aluminum Alloy Designations
N/A
As outlined below, the first digit indicates the alloy group according to the major alloying elements. 1xxx Series In this group minimum aluminum content is 99% and there is no major alloying element. The second digit indicates modifications in impurity limits. If the second digit is zero, there is no special control on individual impurities. Digits 1 through 9, which are assigned consecutively as needed, indicate special control of one or more individual impurities. The last two digits indicate specific minimum aluminum content. Although the absolute minimum aluminum content in this group is 99%, the minimum for certain grades is higher than 99%, and the last two digits represent the hundredths of a per cent over 99. Thus, 1030 would indicate 99.30% minimum aluminum. without special control on individual impurities. The designations 1130, 1230, 1330, etc.. indicate the same purity with special control on one or more impurities. Likewise 1100 indicates minimum aluminum content of 99.00% with individual impurity control. 2xxx through 9xxx Series The major alloying elements are indicated by the first digit, as follows:
3xxx Manganese 4xxx Silicon 5xxx Magnesium 6xxx Magnesium and silicon 7xxx Zinc 8xxx Other element 9xxx Unused series The second digit indicates alloy modification. If the second digit is zero. it indicates the original alloy: digits 1 through 9, which are assigned consecutively, indicate alloy modifications. The last two digits have no special significance, serving only to identify the different alloys in the group. Experimental Alloys Experimental alloys are designated according to the four digit system, but they are prefixed by the letter X. The prefix is dropped when the alloy becomes standard. During development, and before they are designated as experimental, new alloys are identified by serial numbers assigned by their originators. Use of the serial number is discontinued when the X number is assigned. |
- 1 Based on 500000.000 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.
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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.
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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.