S45500 Stainless Steel vs. Grade 18 Titanium
S45500 stainless steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is S45500 stainless steel and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 3.4 to 11 | |
| 11 to 17 |
| Fatigue Strength, MPa | 570 to 890 | |
| 330 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Reduction in Area, % | 34 to 45 | |
| 23 |
| Shear Modulus, GPa | 75 | |
| 40 |
| Shear Strength, MPa | 790 to 1090 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 1370 to 1850 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 1240 to 1700 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 330 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1640 |
| Melting Onset (Solidus), °C | 1400 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 550 |
| Thermal Expansion, µm/m-K | 11 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 3.8 | |
| 41 |
| Embodied Energy, MJ/kg | 57 | |
| 670 |
| Embodied Water, L/kg | 120 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 45 to 190 | |
| 87 to 110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 48 to 65 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 35 to 42 | |
| 39 to 49 |
| Thermal Shock Resistance, points | 48 to 64 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.080 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0 |
| Copper (Cu), % | 1.5 to 2.5 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 71.5 to 79.2 | |
| 0 to 0.25 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 7.5 to 9.5 | |
| 0 |
| Niobium (Nb), % | 0 to 0.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 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 0.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 0 to 0.5 | |
| 0 |
| Titanium (Ti), % | 0.8 to 1.4 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |