AISI 316 Stainless Steel vs. Grade 21 Titanium
AISI 316 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is AISI 316 stainless steel and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 140 |
| Elongation at Break, % | 8.0 to 55 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 210 to 430 | |
| 550 to 660 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Reduction in Area, % | 80 | |
| 22 |
| Shear Modulus, GPa | 78 | |
| 51 |
| Shear Strength, MPa | 350 to 690 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 1180 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 230 to 850 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 590 | |
| 310 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1740 |
| Melting Onset (Solidus), °C | 1380 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 500 |
| Thermal Conductivity, W/m-K | 15 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 16 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 60 |
| Density, g/cm3 | 7.9 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 3.9 | |
| 32 |
| Embodied Energy, MJ/kg | 53 | |
| 490 |
| Embodied Water, L/kg | 150 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 85 to 260 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 1820 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 32 |
| Strength to Weight: Axial, points | 18 to 41 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 18 to 31 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 2.8 |
| Thermal Shock Resistance, points | 11 to 26 | |
| 66 to 100 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 16 to 18 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 62 to 72 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.0 to 3.0 | |
| 14 to 16 |
| Nickel (Ni), % | 10 to 14 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 |
| Silicon (Si), % | 0 to 0.75 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |