ASTM B817 Type I Grade 1 Class A Titanium
ASTM B817 type I grade 1 class A is ASTM B817 type I in the as-fabricated (no temper or treatment) condition. It has the lowest strength and lowest ductility compared to the other variants of ASTM B817 type I.
The graph bars on the material properties cards below compare ASTM B817 type I grade 1 class A 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
4.0 %
Fatigue Strength
360 MPa 52 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
5.0 %
Shear Modulus
40 GPa 5.8 x 106 psi
Tensile Strength: Ultimate (UTS)
770 MPa 110 x 103 psi
Tensile Strength: Yield (Proof)
700 MPa 100 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
340 °C 640 °F
Melting Completion (Liquidus)
1600 °C 2920 °F
Melting Onset (Solidus)
1550 °C 2830 °F
Specific Heat Capacity
560 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
7.1 W/m-K 4.1 BTU/h-ft-°F
Thermal Expansion
9.6 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.0 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.4 g/cm3 280 lb/ft3
Embodied Carbon
38 kg CO2/kg material
Embodied Energy
610 MJ/kg 260 x 103 BTU/lb
Embodied Water
200 L/kg 23 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
30 MJ/m3
Resilience: Unit (Modulus of Resilience)
2310 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
48 points
Strength to Weight: Bending
42 points
Thermal Diffusivity
2.9 mm2/s
Thermal Shock Resistance
54 points
Alloy Composition
| Ti | 87 to 91 | |
| Al | 5.5 to 6.8 | |
| V | 3.5 to 4.5 | |
| Fe | 0 to 0.4 | |
| 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
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