Nickel 625 vs. Grade 21 Titanium
Nickel 625 belongs to the nickel alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is nickel 625 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, % | 33 to 34 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 240 to 320 | |
| 550 to 660 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 79 | |
| 51 |
| Shear Strength, MPa | 530 to 600 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 790 to 910 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 320 to 450 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 310 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1740 |
| Melting Onset (Solidus), °C | 1290 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 500 |
| Thermal Conductivity, W/m-K | 11 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 13 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 60 |
| Density, g/cm3 | 8.6 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 14 | |
| 32 |
| Embodied Energy, MJ/kg | 190 | |
| 490 |
| Embodied Water, L/kg | 290 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 220 to 250 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 490 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 32 |
| Strength to Weight: Axial, points | 26 to 29 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 2.8 |
| Thermal Shock Resistance, points | 22 to 25 | |
| 66 to 100 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.4 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.050 |
| Chromium (Cr), % | 20 to 23 | |
| 0 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 14 to 16 |
| Nickel (Ni), % | 58 to 68.9 | |
| 0 |
| Niobium (Nb), % | 3.2 to 4.2 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 to 0.4 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |