S20910 Stainless Steel vs. Grade 18 Titanium
S20910 stainless steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is S20910 stainless steel and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Elongation at Break, % | 14 to 39 | |
| 11 to 17 |
| Fatigue Strength, MPa | 310 to 460 | |
| 330 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Reduction in Area, % | 56 to 62 | |
| 23 |
| Shear Modulus, GPa | 79 | |
| 40 |
| Shear Strength, MPa | 500 to 570 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 940 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 430 to 810 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 1080 | |
| 330 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1640 |
| Melting Onset (Solidus), °C | 1380 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 550 |
| Thermal Conductivity, W/m-K | 13 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 16 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 4.8 | |
| 41 |
| Embodied Energy, MJ/kg | 68 | |
| 670 |
| Embodied Water, L/kg | 180 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 260 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 1640 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 35 |
| Strength to Weight: Axial, points | 28 to 33 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 3.6 | |
| 3.4 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.060 | |
| 0 to 0.080 |
| Chromium (Cr), % | 20.5 to 23.5 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 52.1 to 62.1 | |
| 0 to 0.25 |
| Manganese (Mn), % | 4.0 to 6.0 | |
| 0 |
| Molybdenum (Mo), % | 1.5 to 3.0 | |
| 0 |
| Nickel (Ni), % | 11.5 to 13.5 | |
| 0 |
| Niobium (Nb), % | 0.1 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0.1 to 0.3 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |