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6Al-4V ELI
Low interstitial version of Ti-6Al-4V, for maximum toughness. Preferred for marine and cryogenic applications. This grade is normally used in the annealed condition. Ti-6Al-4V is the preferred choice for the medical implant field.
Stress relief 900-1200°F 1 to 4 hours, air cool. Duplex anneal, bar and forgings: Solution anneal 50-100°F below the beta transus, hold 1 hour minimum, air cool. Then reheat within the range 1300-1400°F, hold 1 hour minimum, air cool. Stress - relief annealing is performed after welding.
Chemistry
| Al | V | Fe | O | C | N | H | Y | Others, Each | Others, Total | Ti | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 5.5 | 3.5 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| MAX | 6.5 | 4.5 | 0.25 | 0.13 | 0.08 | 0.03 | 0.0125 | 0.005 | 0.1 | 0.4 | Balance |
Specifications
AMS 4907, AMS 4930, AMS 4931, AMS 4956, AMS 6932
ASME SB 348
ASTM B 348, ASTM F 136
EN 3.7164
ISO 5832-3
MIL-T-9047
UNS R56401
Werkstoff 3.7164
Inventory
6Al-4V ELI Round Bar, 6Al-4V ELI Welding Products
Common Trade Names
6-4 ELI Titanium, 6-4 ELI
Features
- Resistant to bodily fluids
- Resistant to a variety of corrosive environments
- Freedom from chloride stress corrosion cracking
- Good strength and toughness over a wide temperature range
- High resistance to erosion corrosion and corrosion fatigue
- Useful resistance to dry chlorine, fluorine, hydrogen chloride and hydrogen fluoride gases
Applications
- Medical and dental implants
- Cryogenics
- Aerospace
- Chemical processing
Physical Properties
Density: 0.160 lb/in3
Melting Range: 2370 - 2460°F
Beta Transus: 91790+25°F
Minimum Tensile Properties, AMS 4919, Duplex Annealed
| Temperature, °F | 68-212 | 68-600 | 68-1000 | 68-1200 | 68-1500 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | 9.18 | 9.54 | 10.08 | 10.44 | 10.8 |
Mechanical Properties
Typical hardness Rockwell: C 30-34 Specific minimums, AMS 4931, bar and forging
Representative Tensile Properties, Sheet
| Diameter, in | < 3.0 | < 3.0 < 4.0 | < 4.0) < 6.0 |
| Tensile Strength, ksi | 125 | 123 | 120 |
| 0.2 % Yield Strength, ksi | 115 | 110 | 110 |
| Elongation, % *L (**ST) | 10 (8) | 10 (8) | 8 (8) |
| Reduction of Area, % *L (**ST) | 25 (–) | 20 (15) | 15 (15) |
* Longitudinal ** Short Transverse
Typical Elevated temperature Properties
| Temperature, °F | 93 (200) | 149 (300) | 204 (400) | 260 (500) |
| Ultimate Tensile Strength, ksi | 843.3 (121) | 772.2 (112) | 723.9 (105) | 657.7 (98) |
| 0.2 % Yield Strength, ksi | 710.2 (103) | 641.2 (93) | 586.1 (85) | 531.0 (77) |
| Elongation, % | 13 | 15 | 16 | 16 |