Grade 37 (R52815) Titanium
Grade 37 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R52815 is the UNS number for this material. Additionally, the ASTM designation is Titanium Grade 37.
It has a moderately low tensile strength and a moderately low embodied energy among wrought titaniums.
The graph bars on the material properties cards below compare grade 37 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
110 GPa 15 x 106 psi
Elongation at Break
22 %
Fatigue Strength
170 MPa 25 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
34 %
Shear Modulus
40 GPa 5.8 x 106 psi
Shear Strength
240 MPa 35 x 103 psi
Tensile Strength: Ultimate (UTS)
390 MPa 56 x 103 psi
Tensile Strength: Yield (Proof)
250 MPa 36 x 103 psi
Thermal Properties
Latent Heat of Fusion
420 J/g
Maximum Temperature: Mechanical
310 °C 590 °F
Melting Completion (Liquidus)
1650 °C 2990 °F
Melting Onset (Solidus)
1600 °C 2910 °F
Specific Heat Capacity
550 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
21 W/m-K 12 BTU/h-ft-°F
Thermal Expansion
8.9 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
3.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
6.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.5 g/cm3 280 lb/ft3
Embodied Carbon
31 kg CO2/kg material
Embodied Energy
500 MJ/kg 220 x 103 BTU/lb
Embodied Water
120 L/kg 15 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
76 MJ/m3
Resilience: Unit (Modulus of Resilience)
280 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
26 points
Thermal Diffusivity
8.4 mm2/s
Thermal Shock Resistance
29 points
Alloy Composition
| Ti | 96.9 to 99 | |
| Al | 1.0 to 2.0 | |
| Fe | 0 to 0.3 | |
| O | 0 to 0.25 | |
| 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
Titanium Alloys: Modelling of Microstructure, Properties, and Applications, Wei Sha and Savko Malinov, 2009
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015