ASTM B817 Type II vs. Titanium 4-4-2
Both ASTM B817 type II and titanium 4-4-2 are titanium alloys. They have a moderately high 91% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type II and the bottom bar is titanium 4-4-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 3.0 to 13 | |
| 10 |
| Fatigue Strength, MPa | 390 to 530 | |
| 590 to 620 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 4.0 to 13 | |
| 20 |
| Shear Modulus, GPa | 40 | |
| 42 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
| 1150 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
| 1030 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 350 | |
| 310 |
| Melting Completion (Liquidus), °C | 1580 | |
| 1610 |
| Melting Onset (Solidus), °C | 1530 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 540 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 37 | |
| 39 |
| Density, g/cm3 | 4.6 | |
| 4.7 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 30 |
| Embodied Energy, MJ/kg | 650 | |
| 480 |
| Embodied Water, L/kg | 220 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 26 to 120 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
| 4700 to 5160 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 34 |
| Strength to Weight: Axial, points | 55 to 58 | |
| 68 to 74 |
| Strength to Weight: Bending, points | 45 to 47 | |
| 52 to 55 |
| Thermal Shock Resistance, points | 62 to 66 | |
| 86 to 93 |
Alloy Composition
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| Aluminum (Al), % | 5.0 to 6.0 | |
| 3.0 to 5.0 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.080 |
| Chlorine (Cl), % | 0 to 0.2 | |
| 0 |
| Copper (Cu), % | 0.35 to 1.0 | |
| 0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0.35 to 1.0 | |
| 0 to 0.2 |
| Molybdenum (Mo), % | 0 | |
| 3.0 to 5.0 |
| Nitrogen (N), % | 0 to 0.040 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 to 0.3 | |
| 0 to 0.25 |
| Silicon (Si), % | 0 to 0.1 | |
| 0.3 to 0.7 |
| Sodium (Na), % | 0 to 0.2 | |
| 0 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 82.1 to 87.8 | |
| 85.8 to 92.2 |
| Vanadium (V), % | 5.0 to 6.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |