Titanium 15-3-3-3 vs. AISI 321 Stainless Steel
Titanium 15-3-3-3 belongs to the titanium alloys classification, while AISI 321 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is titanium 15-3-3-3 and the bottom bar is AISI 321 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 200 |
| Elongation at Break, % | 5.7 to 8.0 | |
| 34 to 50 |
| Fatigue Strength, MPa | 610 to 710 | |
| 220 to 270 |
| Poisson's Ratio | 0.33 | |
| 0.28 |
| Shear Modulus, GPa | 39 | |
| 77 |
| Shear Strength, MPa | 660 to 810 | |
| 420 to 460 |
| Tensile Strength: Ultimate (UTS), MPa | 1120 to 1390 | |
| 590 to 690 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1340 | |
| 220 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 870 |
| Melting Completion (Liquidus), °C | 1620 | |
| 1430 |
| Melting Onset (Solidus), °C | 1560 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 480 |
| Thermal Conductivity, W/m-K | 8.1 | |
| 16 |
| Thermal Expansion, µm/m-K | 9.8 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.2 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 40 | |
| 16 |
| Density, g/cm3 | 4.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 59 | |
| 3.2 |
| Embodied Energy, MJ/kg | 950 | |
| 45 |
| Embodied Water, L/kg | 260 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 78 to 89 | |
| 190 to 230 |
| Stiffness to Weight: Axial, points | 12 | |
| 14 |
| Stiffness to Weight: Bending, points | 32 | |
| 25 |
| Strength to Weight: Axial, points | 64 to 80 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 50 to 57 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.1 |
| Thermal Shock Resistance, points | 79 to 98 | |
| 13 to 15 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.080 |
| Chromium (Cr), % | 2.5 to 3.5 | |
| 17 to 19 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 65.3 to 74 |
| Manganese (Mn), % | 0 | |
| 0 to 2.0 |
| Nickel (Ni), % | 0 | |
| 9.0 to 12 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.1 |
| Oxygen (O), % | 0 to 0.13 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tin (Sn), % | 2.5 to 3.5 | |
| 0 |
| Titanium (Ti), % | 72.6 to 78.5 | |
| 0 to 0.7 |
| Vanadium (V), % | 14 to 16 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |