Nickel 908 vs. S21904 Stainless Steel
Nickel 908 belongs to the nickel alloys classification, while S21904 stainless steel belongs to the iron alloys. They have 52% of their average alloy composition in common. There are 29 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 908 and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Elongation at Break, % | 11 | |
| 17 to 51 |
| Fatigue Strength, MPa | 450 | |
| 380 to 550 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 70 | |
| 78 |
| Shear Strength, MPa | 800 | |
| 510 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 1340 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 930 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 920 | |
| 980 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1400 |
| Melting Onset (Solidus), °C | 1380 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 480 |
| Thermal Conductivity, W/m-K | 11 | |
| 14 |
| Thermal Expansion, µm/m-K | 8.6 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 50 | |
| 15 |
| Density, g/cm3 | 8.3 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 9.3 | |
| 3.0 |
| Embodied Energy, MJ/kg | 140 | |
| 43 |
| Embodied Water, L/kg | 170 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 4.2 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2340 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 12 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 45 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 33 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 3.8 |
| Thermal Shock Resistance, points | 61 | |
| 15 to 21 |
Alloy Composition
| Aluminum (Al), % | 0.75 to 1.3 | |
| 0 |
| Boron (B), % | 0 to 0.012 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.040 |
| Chromium (Cr), % | 3.8 to 4.5 | |
| 19 to 21.5 |
| Cobalt (Co), % | 0 to 0.5 | |
| 0 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Iron (Fe), % | 35.6 to 44.6 | |
| 59.5 to 67.4 |
| Manganese (Mn), % | 0 to 1.0 | |
| 8.0 to 10 |
| Nickel (Ni), % | 47 to 51 | |
| 5.5 to 7.5 |
| Niobium (Nb), % | 2.7 to 3.3 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0.15 to 0.4 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.0050 | |
| 0 to 0.030 |
| Titanium (Ti), % | 1.2 to 1.8 | |
| 0 |