|
KAISER ALUMINUM
TECHNICAL REFERENCE LIBRARY 1019
| Technical Data - ALLOY 7050 |
Call 1-800-USE-2011 |
| Chemical Composition
Limits |
Others |
| Weight % |
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zn |
Ti |
Zr |
Each |
Total |
| Minimum |
- |
- |
2.0 |
- |
1.9 |
- |
5.7 |
- |
0.08 |
- |
- |
| Maximum |
0.12 |
0.15 |
2.6 |
0.10 |
2.6 |
0.04 |
6.7 |
0.06 |
0.15 |
0.05 |
0.15 |
| Typical
Physical Properties |
| Characteristic |
English |
Metric |
| Nominal
Density (68 °F/20 °C) |
0.102
lbs./in.3 |
2.83 Mg/m3 |
| Melting
Range |
870 °F -
1175 °F |
524
°C -
635 °C |
| Specific
Heat (212 °F/100 °C) |
0.21
BTU/lb. - °F |
860 J/kg
- °K |
| Coefficient of Thermal Expansion |
|
13.1
micro in./in.-°F |
23.5
micro m/m -°K |
|
|
3.78 x 10-5in.3/in.3
-°F |
68 x 10-6m3/m3
-°K |
| Thermal Conductivity (68°F/20°C) |
T76,T76511 |
89
BTU/ft.
- hr. - °F |
154 W/m -
°K |
| T3,
T7351,T74, T74511 |
91
BTU/ft. - hr. - °F |
157 W/m -
°K |
| Electrical Conductivity (68°F/20°C) |
Equal Volume |
T76,T76511 |
39.5% IACS |
| T74, T74511 |
40.5% IACS |
| Typical Mechanical Properties
(Longitudinal) |
| |
Tensile (.500"
Dia. Specimen) |
Hardness |
Shear |
Fatigue1 |
Modulus |
| Temper |
Yield |
Ultimate |
Elongation/4D |
|
Ultimate
Shearing Strength |
Endurance
Limit - R.R. Moore Type |
Modulus
of Elasticity |
| KSI |
MPa |
KSI |
MPa |
% |
|
KSI |
MPa |
KSI |
MPa |
KSI
x 103 |
Gpa |
| T76, T76511 |
71 |
489 |
80 |
552 |
11 |
150 |
47 |
324 |
- |
- |
10.2 |
70.3 |
| T74, T74511 |
68 |
469 |
76 |
524 |
11 |
140 |
44 |
303 |
- |
- |
10.2 |
70.3 |
|
1 5 x 10E7
cycles, axially loaded specimens tested at R = 0.1 |
| Comparative Characteristics |
| Temper |
Corrosion
Resistance |
|
|
|
|
Weldability4 |
| General1 |
Stress2 |
Gas |
Arc |
Spot |
| T76, T76511 |
C |
B |
D |
B |
B |
D |
D |
D |
B |
| T74, T74511 |
C |
B |
D |
B |
B |
D |
D |
D |
B |
| 1 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. |
| 2 Stress-corrosion cracking ratings
are based on service experience and laboratory tests of specimens exposed to the 3.5%
sodium chloride alternate immersion test. |
| A= |
No known instance of failure in service or in
laboratory tests. |
| B= |
No known instance of failure in service;
limited failures in laboratory tests of short transverse specimens. |
| C= |
Service failures with sustained tension
stress acting in short transverse direction relative to grain structure; limited failures
in laboratory tests of long transverse specimens. |
| D= |
Limited service failures with sustained
longitudinal or long transverse |
|
|
| 3 Ratings A through D for Workability
(cold), A through E for Machinability and A through C for Anodize Response, are relative
ratings in decreasing order of merit. |
| 4 Ratings A through D for Weldability
and Brazeability are relative ratings defined as follows: |
| A= |
Generally weldable by all commercial
procedures and methods. |
| B= |
Weldable with special techniques or for
specific applications that justify preliminary trails 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. |
| D= |
No commonly used welding methods have been
developed. |
|
| Applicable
Specifications |
| Extruded |
| AMS 4340 |
| AMS 4341 |
| AMS 4342 |
| This alloy is used in aircraft structural
parts. The alloy has characteristics of high strength coupled with good resistance to
exfoliation and stress corrosion cracking. The alloy also has good fracture toughness and
fatigue resistance. |
|
