Aluminum Alloys 2000 Series

2000 series - Copper is the principal alloying element in this group. These alloys require solution heat-treatment to obtain optimum properties; in the heat treated condition mechanical properties are similar to, and sometimes exceed, those of mild steel. In some instances artificial aging is employed to further increase the mechanical properties. This treatment materially increases yield strength, with attendant loss in elongation; its effect on tensile (ultimate) strength is not as great. The alloys in the 2000 series do not have as good corrosion resistance as most other aluminum alloys and under certain conditions they may be subject to intergranular corrosion. Therefore, these alloys in the form of sheet are usually clad with a high-purity alloy or a magnesium-silicon alloy of the 6000 series which provides galvanic protection to the core material and thus greatly increases resistance to corrosion. Alloy 2024 is perhaps the best known and most widely used aircraft alloy.


(1) (2)

CHEMICAL COMPOSITION LIMITS OF WROUGHT ALUMINUM ALLOYS

SILICON

IRON

COPPER

MANGANESE

MAGNESIUM
CHROMIUM
NICKEL
ZINC
TITANIUM
OTHER (3)
ALUMINUM
　 　 　 　 　 　 　 　 　

Each

Total

Min. (4)

0.5

0.5

3.8-4.9

0.30-0.9

1.2-1.8

0.10

-

0.25

0.15(21)

0.05

0.15

Remainder

(1) Composition in percent maximum unless shown as a range or a minimum.

(2) For purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis is rounded off to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with AN Standard Rules for Rounding Off Numerical Values (ANSI Z25.1).

(3) Analysis is regularly made only for the elements for which specific limits are shown, except for unalloyed aluminum. If, however, the presence of other elements is suspected to be, or in the course of routine analysis is indicated to be in excess of the specified limits, further analysis is made to determine that these other elements are not in excess of the amount specified.

(4) The aluminum content for unalloyed aluminum not made by a refining process is the difference between 100.00 percent and the sum of all other metallic elements present in amounts of 0.010 percent or more each, expressed to the second decimal.

(21) Zinconium plus titanium 0.20 percent maximum.

　

Typical mechanical Properties 2024-T351

Tensile Strength, ksi 68
Yield Strength, ksi 47
Elongation (in 2 inches - 1/2” diameter specimen) 19%
Elongation (in 2 inches - 1/16” thick specimen) 20%
Hardness (500 kg load 10mm ball) 120
Shear ksi 41
Fatigue ksi 20
Modulus ksi x 103 10.6

 

Typical Physical Properties 2024-T351

Electrical Conductivity (% IACS) 30
Electrical Resistivity Microhm-cm 5.8
Coefficient of Thermal Expansion

-58 to 68℉ 11.9 x 10-6

68 to 212℉ 12.6 x 10-6

68 to 392℉ 13.2 x 10-6

68 to 572℉ 13.7 x 10-6

Specific Gravity 2.78
Density (lb per cu in.) 0.100
Thermal Conductivity (Btu per in. per sq. ft)
At 75℉ 840
At 25℃ (CGS units) 0.29
Melting Range (℉) 935 - 1180

ALUMINUM SQUARE BAR

COLD FINISHED EXTRUDED: Fed. Spec. QQ-A-225/6, Color Ends Red
ROLLED EXTRUDED: Fed. Spec. QQ-A-200/3, Color Ends Red/White Stripe

2024-T4/T351 & T3511

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

　

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

1/4

.074

.888

x

　 　

1-5/8

3.20

38.40

　

x

5/16

.117

1.40

x

　 　

1-3/4

3.67

44.04

x

　

3/8

.168

2.01

x

　 　

2

4.80

57.60

x

x

7/16

.225

2.70

x

　 　

2-1/4

6.07

72.84

x

　

1/2

.299

3.59

x

　 　

2-3/8

6.77

81.24

x

x

9/16

.379

4.55

x

　 　

2-1/2

7.50

90.00

x

x

5/8

.467

5.60

x

　 　

2-3/4

9.07

108.84

x

　

3/4

.674

8.09

x

　 　

3

10.80

129.60

x

x

7/8

.923

11.08

x

　 　

3-1/4

12.68

152.16

x

　

1

1.20

14.40

x

x

　

3-1/2

14.70

176.40

x

x

1-1/8

1.52

18.24

x

　 　

4

19.20

230.40

x

x

1-1/4

1.87

22.44

x

x

　

4-1/2

24.30

291.60

　

x

1-3/8

2.30

27.60

x

　 　

5

30.00

360.00

　

x

1-1/2

2.70

32.40

x

x

　

6

43.20

518.40

　

x

　

CF - Cold Finished

E - Extruded

　

Outstanding Characteristics

2024 alloy has the highest tensile and shear strength of all the aluminum screw machine alloys - recommending it especially for fasteners, couplings and other parts requiring consistent high strength.

　

 

 　

Some Typical Applications

Couplings
Fasteners
Aircraft Parts
Missile Fittings
Proximity Fuse Heads
Computer Components
Switch Retainer Rings
Fire Control Devices
Potentiometers
Hydraulic Valve Bodies
Rectifiers

　

ALUMINUM RECTANGULAR BAR

COLD FINISHED EXTRUDED: Fed. Spec. QQ-A-225/6, Color Ends Red
ROLLED EXTRUDED: Fed. Spec. QQ-A-200/3, Color Ends Red/White Stripe

2024-T351 & T3511

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

 　

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

5/8 x 1-1/2

1.12

13.44

x

 　 　

1-1/4 x 2-1/4

3.38

40.50

x

 　

5/8 x 2

1.50

18.00

x

 　 　

1-1/4 x 2-1/2

3.75

45.00

x

x

5/8 x 3

2.25

37.00

x

 　 　

1-1/4 x 3

4.50

54.00

x

x

3/4 x 1

.90

10.80

x

 　 　

1-1/4 x 4

6.05

72.60

x

x

3/4 x 1-1/4

1.10

13.20

x

 　 　

1-1/4 x 5

7.50

90.00

x

 　

3/4 x 1-1/2

1.35

16.20

x

 　 　

1-1/2 x 2

3.60

43.20

x

x

3/4 x 1-3/4

1.57

18.89

x

 　 　

1-1/2 x 2-1/4

4.05

48.60

x

 　

3/4 x 2

1.80

21.60

x

 　 　

1-1/2 x 2-1//2

4.50

54.00

x

x

3/4 x 2-1/2

2.25

27.00

x

 　 　

1-1/2 x 2-3/4

5.00

60.00

x

 　

3/4 x 3

2.70

32.40

x

 　 　

1-1/2 x 3

5.40

64.80

x

x

3/4 x 3-1/2

3.15

37.80

x

 　 　

1-1/2 x 3-1/2

6.17

74.04

 　

x

3/4 x 4

3.52

42.24

x

 　 　

1-1/2 x 4

7.20

86.40

x

x

3/4 x 6

5.40

64.80

x

 　 　

1-1/2 x 5

9.00

108.00

x

 　

7/8 x 2

2.10

25.20

x

 　 　

1-1/2 x 6

10.80

129.60

x

x

1 x 1-1/4

1.50

18.00

x

 　 　

1-3/4 x 2

4.20

50.40

x

 　

1 x 1-1/2

1.80

21.60

x

x

 　

1-3/4 x 2-1/2

5.25

63.00

x

 　

1 x 1-3/4

2.10

25.20

x

 　 　

1-3/4 x 3

6.30

75.60

x

x

1 x 2

2.40

28.80

x

x

 　

1-3/4 x 3-1/2

7.35

88.20

x

 　

1 x 2-1/2

3.00

36.00

x

x

 　

1-3/4 x 4

8.40

100.80

x

 　

1 x 3

3.60

43.20

x

 　 　

1-3/4 x 10

20.70

248.40

x

 　

1 x 3-1/2

4.20

50.40

x

 　 　

2 x 2-1/4

5.40

64.80

x

x

1 x 4

4.80

57.60

x

 　 　

2 x 2-1/2

6.00

72.00

x

x

1 x 5

6.00

72.00

x

 　 　

2 x 3

7.20

86.40

x

x

1 x 6

7.20

86.40

x

 　 　

2 x 3-1/2

8.40

100.80

x

 　

1-1/8 x 2-1/8

2.87

34.44

 　

x

 　

2 x 4

9.60

115.20

x

x

1-1/4 x 1-1/2

2.25

27.00

x

 　 　

2 x 4-1/2

10.80

129.60

 　

x

1-1/4 x 1-3/4

2.63

31.56

x

 　 　

2 x 5

12.00

144.00

x

x

1-1/4 x 2

3.00

36.00

x

 　 　

2 x 6

14.40

172.80

x

x

　

2-1/4 x 2-1/2

6.61

79.32

 　

x

 　

2-3/4 x 4

13.20

158.40

x

 　

2-1/4 x 3

7.93

95.16

 　

x

 　

2-3/4 x 4-1/2

14.54

174.48

x

 　

2-1/4 x 4

10.80

129.60

x

 　 　

3 x 3-1/2

12.60

151.20

x

x

2-1/4 x 5

13.50

162.00

 　

x

 　

3 x 4

14.40

172.80

x

x

2-1/2 x 2-3/4

7.50

90.00

 　

x

 　

3 x 4-1/2

16.20

194.40

x

 　

2-1/2 x 3

9.00

108.00

x

x

 　

3 x 5

18.00

216.00

x

x

2-1/2 x 3-1/2

10.50

126.00

 　

x

 　

3 x 6

21.60

259.20

x

x

2-1/2 x 4

12.00

144.00

x

x

 　

3 x 7

25.20

302.40

 　

x

2-1/2 x 4-1/2

13.50

162.00

x

 　 　

3-1/2 x 4-1/2

18.90

226.80

 　

x

2-1/2 x 5

15.00

180.00

x

x

 　

3-1/2 x 5

21.00

252.00

 　

x

2-1/2 x 6

18.00

216.00

x

x

 　

4 x 5

24.00

288.00

x

x

2-1/2 x 6-1/4

18.75

225.00

x

 　 　

4 x 6

28.80

345.00

x

x

2-1/2 x 7

21.00

252.00

x

 　 　

4 x 8

38.40

460.80

 　

x

2-1/2 x 8

24.00

288.00

 　

x

 　

4-1/2 x 5

27.00

324.00

 　

x
　 　 　 　 　 　

5 x 6

36.00

432.00

 　

x

　

ALUMINUM RECTANGULAR BAR

COLD FINISHED EXTRUDED: Fed. Spec. QQ-A-225/6, Color Ends Red


2024-T4

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

 　

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

 　

1/8 x 1/2

.074

.89

x

 　

5/16 x 2

.750

9.00

x

 　

1/8 x 5/8

.092

1.10

x

 　

3/8 x 1/2

.226

2.71

x

 　

1/8 x 3/4

.110

1.32

x

 　

3/8 x 5/8

.281

3.37

x

 　

1/8 x 1

.150

1.80

x

 　

3/8 x 3/4

.337

4.04

x

 　

1/8 x 1-1/4

.184

2.21

x

 　

3/8 x 1

.450

5.40

x

 　

1/8 x 1-1/2

.226

2.71

x

 　

3/8 x 1-1/4

.563

6.76

x

 　

1/8 x 2

.299

3.59

x

 　

3/8 x 1-1/2

.676

8.11

x

 　

3/16 x 5/16

.070

.84

x

 　

3/8 x 1-3/4

.771

9.25

x

 　

3/16 x 1/2

.113

1.36

x

 　

3/8 x 2

.900

10.80

x

 　

3/16 x 5/8

.140

1.68

x

 　

3/8 x 2-1/2

1.13

13.56

x

 　

3/16 x 3/4

.169

2.03

x

 　

3/8 x 3

1.35

16.20

x

 　

3/16 x 1

.225

2.70

x

 　

3/8 x 4

1.80

21.60

x

 　

3/16 x 1-1/4

.282

3.38

x

 　

3/8 x 6

2.70

32.40

x

 　

3/16 x 1-1/2

.338

4.06

x

 　

3/8 x 10

4.41

52.92

x

 　

3/16 x 2

.451

5.41

x

 　

1/2 x 5/8

.376

4.51

x

 　

1/4 x 1/2

.150

1.80

x

 　

1/2 x 3/4

.450

5.40

x

 　

1/4 x 5/8

.187

2.24

x

 　

1/2 x 7/8

.524

6.29

x

 　

1/4 x3/4

.226

2.71

x

 　

1/2 x 1

.600

7.20

x

 　

1/4 x 7/8

.263

3.16

x

 　

1/2 x 1-1/4

.750

. 9.00

x

 　

1/4 x 1

.300

3.60

x

 　

1/2 x 1-1/2

.900

10.80

x

 　

1/4 x 1-1/4

.374

4.49

x

 　

1/2 x 1-3/4

1.05

12.60

x

 　

1/4 x 1-1/2

.450

5.40

x

 　

1/2 x 2

1.20

14.40

x

 　

1/4 x 2

.600

7.20

x

 　

1/2 x 2-1/2

1.50

18.00

x

 　

1/4 x 2-1/2

.750

9.00

x

 　

1/2 x 3

1.80

21.60

x

 　

1/4 x 3

.900

10.80

x

 　

1/2 x 4

2.40

. 28.80

x

 　

1/4 x 4

1.200

14.40

x

 　

1/2 x 6

3.60

43.20

x

 　

5/16 x 1/2

.187

2.24

x

 　

5/8 x 3/4

.563

6.76

x

 　

5/16 x 5/8

.234

2.81

x

 　

5/8 x 7/8

.656

7.87

x

 　

5/16 x 3/4

.282

3.38

x

 　

5/8 x 1

.750

9.00

x

 　

5/16 x 1

.376

4.51

x

 　

5/8 x 1-1/4

.937

11.24

x

 　

5/16 x 1-1/2

.562

6.74

x

 　 　 　 　 　 　

　

CF - Cold Finished

　

ALUMINUM ROUND BAR

 COLD FINISHED EXTRUDED: Fed. Spec. QQ-A-225/6, Color Ends Red
ROLLED EXTRUDED: Fed. Spec. QQ-A-200/3, Color Ends Red/White Stripe

2024-T4/T351 & T3511

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

 　

Size In

Inches

Lbs.

Per Ft.

12 Ft.

Bar

CF

E

1/8

.015

.180

x

 　 　

1-9/16

2.30

27.60

x

 　

5/32

.023

.276

x

 　 　

1-5/8

2.56

30.72

x

 　

3/16

.033

.396

x

 　 　

1-11/16

2.74

32.88

x

 　

1/4

.059

.709

x

 　 　

1-3/4

2.96

35.52

x

x

5/16

.092

1.10

x

 　 　

1-13/16

3.15

37.80

x

 　

3/8

.134

1.61

x

 　 　

1-7/8

3.31

39.75

x

 　

7/16

.182

2.19

x

 　 　

1-15/16

3.54

42.45

x

 　

1/2

.238

2.86

x

 　 　

2

3.77

45.24

x

x

9/16

.301

3.61

x

 　 　

2-1/16

4.01

48.12

x

 　

5/8

.371

4.45

x

 　 　

2-1/8

4.26

51.07

x

 　

11/16

.449

5.39

x

 　 　

2-3/16

4.51

54.12

x

 　

3/4

.535

6.42

x

x

 　

2-1/4

4.77

57.25

x

x

13/16

.627

7.52

x

 　 　

2-5/16

5.04

60.48

x

 　

7/8

.730

8.70

x

 　 　

2-3/8

5.32

63.79

x

 　

15/16

.828

9.94

x

 　 　

2-1/2

5.89

70.69

x

x

1

.954

11.45

x

x

 　

2-9/16

6.19

74.26

x

 　

1-1/16

1.06

12.77

x

 　 　

2-5/8

6.49

77.93

x

 　

1-1/8

1.19

14.28

x

 　 　

2-3/4

7.13

85.54

x

x

1-3/16

1.33

15.96

x

 　 　

2-7/8

7.79

93.48

x

 　

1-1/4

1.53

18.36

x

 　 　

3

8.48

101.80

x

x

1-5/16

1.69

20.25

x

 　 　

3-1/16

8.84

106.07

x

 　

1-3/8

1.84

22.08

x

 　 　

3-1/8

9.20

110.45

x

 　

1-7/16

1.95

23.40

x

 　 　

3-1/4

9.96

119.46

x

 　

1-1/2

2.19

26.28

x

x

 　

3-3/8

10.74

128.88

x

 　

　

Size In

Inches
Lbs.

Per Ft.
12 Ft.

Bar

CF

E

 　
Size In

Inches
Lbs.

Per Ft.
12 Ft.

Bar

CF

E

3-1/2

11.55

138.54

x

x

 　

5

23.56

282.72

x

x

3-9/16

11.96

143.53

x

 　 　

5-1/4

25.98

311.74

x

 　

3-5/8

12.39

148.62

x

 　 　

5-1/2

28.51

342.12

x

x

3-3/4

13.25

159.05

x

 　 　

5-3/4

31.16

373.92

x

 　

4

15.08

180.95

x

x

 　

6

33.93

407.16

x

x

4-1/16

15.56

186.70

x

 　 　

6-1/4

36.82

441.80

x

 　

4-1/8

16.04

192.48

x

 　 　

6-1/2

39.82

477.84

x

 　

4-1/4

17.02

204.28

x

 　 　

7

46.18

554.18

x

x

4-1/2

19.09

229.02

x

x

 　

7-1/2

53.01

636.17

x

 　

4-3/4

21.27

255.18

x

 　 　

8

60.32

723.84

x

x
　 　 　 　 　 　

8-1/4

65.43

785.16

x

 　

　

CF - Cold Finished/Rolled
E - Extruded

 

ALUMINUM PLATE
(STENCILED AND INTERLEAVED)

2024-T351

Thickness & Size

In Inches

Pounds Per

Square Foot

Pounds Per

Plate

.250 x 24 x 72

43.77

36 x 96

3.614

86.74

48 x 144

173.49

.313 x 36 x 96

108.72

48 x 144

4.530

217.43

.375 x 24 x 72

65.06

36 x 96

5.420

130.12

48 x 144

260.24

.500 x 24 x 72

86.83

36 x 96

7.230

173.49

48 x 144

347.33

.625 x 36 x 96

217.08

48 x 144

9.040

434.16

.750 x 36 x 96

260.50

48 x 144

10.840

520.99

.875 x 36 x 96

303.91

1.000 x 24 x 72

12.660

173.66

36 x 96

14.470

347.33

48 x 144

694.66

1.250 x 36 x 96

434.16

48 x 144

18.000

868.32

1.500 x 24 x 72

260.50

36 x 96

21.710

521.00

48 x 144

1042.00

1.750 x 36 x 96

607.83

48 x 144

25.330

1215.65

2.000 x 24 x 72

347.32

36 x 96

28.940

694.65

48 x 144

32.560

1389.31

2.250 x 48 x 144

1563.00

2.500 x 36 x 96

868.32

48 x 144

36.180

1736.64

3.000 x 36 x 96

1042.00

48 x 144

43.420

2084.00

3.500 x 48 x 144

50.650

2431.00

4.000 x 48 x 144

57.890

2778.62

4.500 x 48 x 144

65.120

3126.00

5.000 x 48 x 144

72.360

3473.28

5.500 x 48 x 144

79.600

3820.80

6.000 x 48 x 144

86.830

4169.00

　

T4

Solution heat-treated and naturally aged to a substantially stable condition. Applies to products which are not cold worked after solution heat-treatment, or in which the effect of cold work in flattening or straightening may not be recognized in mechanical property limits.

T3

Solution heat-treated @ cold worked, and naturally aged to a substantially stable condition. Applies to products that are cold worked to improve strength after solution heat-treatment, or in which the effect of cold work in flattening or straightening is recognized in mechanical property limits.

　 　 　 　

T351

Applies to plate and rolled or cold-finished rod or bar, die or ring forging and rolled rings when stretched the indicated amounts after solution heat treatment or after cooling from an elevated temperature shaping process. The products receive no further straightening after stretching.

T3511

Applies to extruded rod, bar, shapes and tube and to drawn tube when stretched the indicated amounts after solution heat treatment or after cooling from an elevated temperature shaping process. These products may received minor straightening after stretching to comply with standard tolerances.