Grade 38 (R54250) Titanium
Grade 38 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R54250 is the UNS number for this material. Additionally, the ASTM designation is Titanium Grade 38.
It has a moderately high tensile strength among the wrought titaniums in the database.
The graph bars on the material properties cards below compare grade 38 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
11 %
Fatigue Strength
530 MPa 77 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
29 %
Shear Modulus
40 GPa 5.9 x 106 psi
Shear Strength
600 MPa 87 x 103 psi
Tensile Strength: Ultimate (UTS)
1000 MPa 150 x 103 psi
Tensile Strength: Yield (Proof)
910 MPa 130 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
330 °C 630 °F
Melting Completion (Liquidus)
1620 °C 2950 °F
Melting Onset (Solidus)
1570 °C 2860 °F
Specific Heat Capacity
550 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
8.0 W/m-K 4.6 BTU/h-ft-°F
Thermal Expansion
9.3 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.4 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.5 g/cm3 280 lb/ft3
Embodied Carbon
35 kg CO2/kg material
Embodied Energy
560 MJ/kg 240 x 103 BTU/lb
Embodied Water
160 L/kg 20 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
3840 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
62 points
Strength to Weight: Bending
49 points
Thermal Diffusivity
3.2 mm2/s
Thermal Shock Resistance
72 points
Alloy Composition
| Ti | 89.9 to 93.1 | |
| Al | 3.5 to 4.5 | |
| V | 2.0 to 3.0 | |
| Fe | 1.2 to 1.8 | |
| O | 0.2 to 0.3 | |
| 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