Grade 6 (3.7115) Titanium
Grade 6 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 3.7115 is the EN numeric designation for this material. Additionally, the ASTM designation is Titanium Grade 6.
It has the lowest melting temperature and a fairly low embodied energy among wrought titaniums.
The graph bars on the material properties cards below compare grade 6 titanium to: wrought titaniums (top), all titanium alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
100 GPa 15 x 106 psi
Elongation at Break
11 %
Fatigue Strength
290 MPa 42 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
27 %
Shear Modulus
39 GPa 5.7 x 106 psi
Shear Strength
530 MPa 77 x 103 psi
Tensile Strength: Ultimate (UTS)
890 MPa 130 x 103 psi
Tensile Strength: Yield (Proof)
840 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
310 °C 580 °F
Melting Completion (Liquidus)
1580 °C 2870 °F
Melting Onset (Solidus)
1530 °C 2780 °F
Specific Heat Capacity
550 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
7.8 W/m-K 4.5 BTU/h-ft-°F
Thermal Expansion
9.4 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.5 g/cm3 280 lb/ft3
Embodied Carbon
30 kg CO2/kg material
Embodied Energy
480 MJ/kg 210 x 103 BTU/lb
Embodied Water
190 L/kg 22 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
92 MJ/m3
Resilience: Unit (Modulus of Resilience)
3390 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
55 points
Strength to Weight: Bending
46 points
Thermal Diffusivity
3.2 mm2/s
Thermal Shock Resistance
65 points
Alloy Composition
| Ti | 89.8 to 94 | |
| Al | 4.0 to 6.0 | |
| Sn | 2.0 to 3.0 | |
| Fe | 0 to 0.5 | |
| O | 0 to 0.2 | |
| C | 0 to 0.080 | |
| N | 0 to 0.030 | |
| H | 0 to 0.015 | |
| res. | 0 to 0.4 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B381: Standard Specification for Titanium and Titanium Alloy Forgings
ASTM B265: Standard Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate
ASTM B348: Standard Specification for Titanium and Titanium Alloy Bars and Billets
Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003
Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007
Aerospace Materials, Brian Cantor et al. (editors), 2001
Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010