ASTM B817 Type II Titanium
ASTM B817 type II is a titanium alloy formulated for forming by powder metallurgy. It has a very low melting temperature among titanium alloys. In addition, it has a moderately high density and a moderately high embodied energy.
The properties of ASTM B817 type II include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare ASTM B817 type II to: powder metallurgy titanium alloys (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
3.0 to 13 %
Fatigue Strength
390 to 530 MPa 57 to 77 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
4.0 to 13 %
Shear Modulus
40 GPa 5.7 x 106 psi
Tensile Strength: Ultimate (UTS)
900 to 960 MPa 130 to 140 x 103 psi
Tensile Strength: Yield (Proof)
780 to 900 MPa 110 to 130 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
350 °C 660 °F
Melting Completion (Liquidus)
1580 °C 2880 °F
Melting Onset (Solidus)
1530 °C 2790 °F
Specific Heat Capacity
550 J/kg-K 0.13 BTU/lb-°F
Thermal Expansion
9.9 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
37 % relative
Density
4.6 g/cm3 290 lb/ft3
Embodied Carbon
40 kg CO2/kg material
Embodied Energy
650 MJ/kg 280 x 103 BTU/lb
Embodied Water
220 L/kg 26 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
26 to 120 MJ/m3
Resilience: Unit (Modulus of Resilience)
2890 to 3890 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
34 points
Strength to Weight: Axial
55 to 58 points
Strength to Weight: Bending
45 to 47 points
Thermal Shock Resistance
62 to 66 points
Alloy Composition
| Ti | 82.1 to 87.8 | |
| Al | 5.0 to 6.0 | |
| V | 5.0 to 6.0 | |
| Sn | 1.5 to 2.5 | |
| Fe | 0.35 to 1.0 | |
| Cu | 0.35 to 1.0 | |
| O | 0 to 0.3 | |
| Na | 0 to 0.2 | |
| Cl | 0 to 0.2 | |
| C | 0 to 0.1 | |
| Si | 0 to 0.1 | |
| N | 0 to 0.040 | |
| 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 B817: Standard Specification for Powder Metallurgy (P/M) Titanium Alloy Structural Components
Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003
Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007