Titanium 4-4-2 vs. S21904 Stainless Steel
Titanium 4-4-2 belongs to the titanium alloys classification, while S21904 stainless steel belongs to the iron 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 titanium 4-4-2 and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 10 | |
| 17 to 51 |
| Fatigue Strength, MPa | 590 to 620 | |
| 380 to 550 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 42 | |
| 78 |
| Shear Strength, MPa | 690 to 750 | |
| 510 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 1150 to 1250 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 1030 to 1080 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 980 |
| Melting Completion (Liquidus), °C | 1610 | |
| 1400 |
| Melting Onset (Solidus), °C | 1560 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 480 |
| Thermal Conductivity, W/m-K | 6.7 | |
| 14 |
| Thermal Expansion, µm/m-K | 8.6 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 39 | |
| 15 |
| Density, g/cm3 | 4.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 30 | |
| 3.0 |
| Embodied Energy, MJ/kg | 480 | |
| 43 |
| Embodied Water, L/kg | 180 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4700 to 5160 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 34 | |
| 25 |
| Strength to Weight: Axial, points | 68 to 74 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 52 to 55 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 2.6 | |
| 3.8 |
| Thermal Shock Resistance, points | 86 to 93 | |
| 15 to 21 |
Alloy Composition
| Aluminum (Al), % | 3.0 to 5.0 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.040 |
| Chromium (Cr), % | 0 | |
| 19 to 21.5 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 59.5 to 67.4 |
| Manganese (Mn), % | 0 | |
| 8.0 to 10 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 5.5 to 7.5 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0.15 to 0.4 |
| Oxygen (O), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.045 |
| Silicon (Si), % | 0.3 to 0.7 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 0 |
| Titanium (Ti), % | 85.8 to 92.2 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |