Aluminium Alloy 7050 (AMS 4050 / AMS 4342)

 

Chemical Composition Limits

Weight%

Al

Zr

Si

Fe

Cu

Mn

Mg

Cr

Zn

Ti

Other Each

Others Total

7050 min

87.3

0.08

-

-

2.0

-

1.9

-

5.7

-

-

-

7050 max

90.3

0.15

0.12

0.15

2.6

0.10

2.6

0.04

6.7

0.06

0.05

0.15

Aluminium alloy 7050 is an aerospace grade of aluminium combining high strength, stress corrosion cracking resistance and toughness. It is particularly suited for heavy plate applications (3" to 6" thick) due to it's lower quench sensitivity and retention of strength in thicker sections. Aluminium 7050 therefore is the premium choice aerospace aluminium for applications such as fuselage frames, bulkheads and wing skins.

Aluminium 7050 plate is available in two tempers. T7651 (AMS 4201) combines the highest strength with good exfoliation corrosion resistance and average SCC resistance. T7451 (AMS 4050) provides better SCC resistance and excellent exfoliation resistance at slightly lower strength levels. Aircraft Materials can also supply 7050 in round bar with temper T74511 (AMS 4342).

Typical Mechanical Properties

 

Material

Temper

Thickness

Tensile Strength (ksi)

Yield Strength (ksi)

Elongation in 2" %

Alloy 7050 Plate (longitudinal)

T7451

<2.0

74

64

10

Alloy 7050 Plate (longitudinal)

T7451

2.0 -3.0

73

63

9

Alloy 7050 Plate (longitudinal)

T7451

3.0 - 4.0

72

62

9

Alloy 7050 Plate (longitudinal)

T7451

4.0 - 5.0

71

61

9

Alloy 7050 Plate (longitudinal)

T7651

0.25 - 1.0

76

66

9

Alloy 7050 Plate (longitudinal)

T7651

1.0 - 1.5

77

67

9

Alloy 7050 Plate (longitudinal)

T7651

1.5 - 2.0

76

66

9

Alloy 7050 Plate (longitudinal)

T7651

2.0 - 3.0

76

66

8

 

Material

Temper

Tensile Strength (ksi)

Yield Strength (ksi)

Elongation in 2" %

Alloy 7050 Bar (AMS 4340)

T76511

79

69

7

Alloy 7050 Bar (AMS 4340)

T73511

70

60

8

Alloy 7050 Bar (AMS 4342)

T74511

73

63

7

Availability

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Specifications
AMS 4050: 7050-T7451 Plate
AMS 4107:7050-T74 Die Forging
AMS 4108:7050-T7452 Hand Forgings
AMS 4201: 7050-T7651 Plate
AMS 4333: 7050-T7452 Forgings
AMS 4340: 7050-T76511 Extrusions
AMS 4341: 7050-T73511 Extrusions
AMS 4342: 7050-T74511 Extrusions

 Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.