6Al-2Sn-4Zr-2Mo
6Al-2Sn-4Zr-2Mo
Sheet & Strip under 0.1875″ thickness: Duplex anneal: 1650 ± 25°F), 30± 3 minutes, air cool, followed by 1450± 25°F 15± 2 minutes, air cool.
Triplex anneal: 1650°F ½ hour, air cool, followed by 1450°F ¼ hour, air cool, 1100°F 2 hours air cool.
Plate 0.1875 inch thickness and over: Duplex anneal: 650± 25°F 60± 5 minutes, air cool, followed by 1100±25°F 8 hours ± 15 minutes, air cool. Triplex anneal: 1650°F ½ hour, air cool, followed by 1450°F ¼, air cool, 1100°F 2 hours air cool.
Bar and Forgings: Duplex anneal: Solution anneal 25 – 50°F below. Beta transus 1 hour, air cool or faster, 1100°F 8 hours air cool.
Chemistry
|
|
Al |
Sn |
Zr |
Mo |
C |
N |
H |
O |
Si |
Fe |
Y |
Others, |
Others, |
Ti |
|
MIN |
5.5 |
1.8 |
3.6 |
1.8 |
— |
— |
— |
— |
0.06 |
|
|
— |
— |
— |
|
MAX |
6.5 |
2.2 |
4.4 |
2.2 |
0.05 |
0.05 |
0.015 |
0.12 |
0.1 |
0.25 |
0.005 |
0.1 |
0.3 |
Balance |
Specifications
AMS 4919, AMS 4975, AMS 4976, AMS 4979, AMS T-9047
EN 3.71450
MIL-F-81556
MIL-F-82142, MIL-T-9046
MIL-T-9047
UNS R54620
Werkstoff 3.7145
Inventory
6Al-2Sn-4Zr-2Mo Forged Billet, 6Al-2Sn-4Zr-2Mo Plate, 6Al-2Sn-4Zr-2Mo Round Bar, 6Al-2Sn-4Zr-2Mo Sheet
Common Trade Names
6-2-4-2 Titanium, 6-2-4-2
Features
• Machinability similar to austenitic stainless steels
• Easily welded if proper precautions are taken to prevent oxygen, nitrogen and hydrogen contaminations
• Long term stability for temperatures up to 800°F
Applications
• Compressor discs, blades
• Airframe structure, skin
• Engine afterburner components
• Hush kits
Physical Properties
Density: 0.160 lb/in3
Beta Transus: 1825±25°F
Thermal Conductivity: 4.00 Btu • hr/ft2 • hr°F
Coefficient of Thermal Expansion: 32-212°F 4.3 x10-6 in/in°F
Modulus of Elasticity: 16.5×106 psi
Mechanical Properties
Minimum Tensile Properties, AMS 4919, Duplex Annealed
|
Thickness, in |
0.025 ≤ 0.062 |
> 0.062 ≤ 1.000 |
> 1.000 ≤ 3.000 |
|
Tensile Strength, ksi |
135,000 |
135,000 |
135,000 |
|
0.2% offset Yield Strength, ksi |
125,000 |
125,000 |
125,000 |
|
Elongation, % |
8 |
10 |
10 |
Bend Factors, Duplex Annealed, AMS 4919
|
Nominal Thickness, in |
≤ 0.070 |
> 0.070 < 0.1875 |
|
Factor, 105° Bend |
9 |
10 |
