Grade 28 Titanium vs. S17700 Stainless Steel
Grade 28 titanium belongs to the titanium alloys classification, while S17700 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is grade 28 titanium and the bottom bar is S17700 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 11 to 17 | |
| 1.0 to 23 |
| Fatigue Strength, MPa | 330 to 480 | |
| 290 to 560 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 40 | |
| 76 |
| Shear Strength, MPa | 420 to 590 | |
| 740 to 940 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 1180 to 1650 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 430 to 1210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 890 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1440 |
| Melting Onset (Solidus), °C | 1590 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 480 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 15 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 13 |
| Density, g/cm3 | 4.5 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 37 | |
| 2.8 |
| Embodied Energy, MJ/kg | 600 | |
| 40 |
| Embodied Water, L/kg | 370 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 15 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1370 to 3100 | |
| 460 to 3750 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 35 | |
| 25 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 42 to 59 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 32 to 40 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 4.1 |
| Thermal Shock Resistance, points | 47 to 66 | |
| 39 to 54 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0.75 to 1.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.090 |
| Chromium (Cr), % | 0 | |
| 16 to 18 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 70.5 to 76.8 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 | |
| 6.5 to 7.8 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Ruthenium (Ru), % | 0.080 to 0.14 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 92.4 to 95.4 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |