Three aluminum casting alloys
were considered for the uplock support --
- A201 Aluminum alloy -- 4.6% copper, 0.7% silver,
0.35% manganese, 0.35% magnesium, and 0.25% titanium
- A206 Aluminum alloy -- 4.5% copper, 0.30%
manganese, 0.25% magnesium, and 0.22% titanium
- D357 Aluminum alloy -- 7% silicon and 0.6%
magnesium.
Aluminum Alloy |
201 T7 |
206 T7 |
357 T6 |
| |
Requirement |
|
|
|
| Ultimate Tensile
Strength (ksI) |
50
or greater |
67 |
49 |
50 |
| Tensile Yield Strength
(ksI) |
40
or greater |
60 |
44 |
40 |
| Minimum Elongation (%) |
5%
or greater |
4.5% |
11% |
5% |
| Castability/Fluidity
( 1= Excellent, 5 = Poor) |
2 or
less |
4 |
3 |
1 |
| Corrosion Resistance
( 1= Excellent, 5 = Poor) |
2 or
less |
4 |
4 |
2 |
| Machinability (1=
Excellent, 5 = Poor) |
3 or
less |
4 |
4 |
3 |
| Weldability
(1= Excellent, 5 = Poor) |
1 |
5 |
5 |
1 |
|
| Which aluminum alloy (201, 206, or 357) best
meets the requirements for strength, ductility,castability, corrosion resistance,
machinability, and weldability? |
|
