Nickel 625 vs. S21800 Stainless Steel
Nickel 625 belongs to the nickel alloys classification, while S21800 stainless steel belongs to the iron alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 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 nickel 625 and the bottom bar is S21800 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 33 to 34 | |
| 40 |
| Fatigue Strength, MPa | 240 to 320 | |
| 330 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 79 | |
| 75 |
| Shear Strength, MPa | 530 to 600 | |
| 510 |
| Tensile Strength: Ultimate (UTS), MPa | 790 to 910 | |
| 740 |
| Tensile Strength: Yield (Proof), MPa | 320 to 450 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 340 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 900 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1360 |
| Melting Onset (Solidus), °C | 1290 | |
| 1310 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 500 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 15 |
| Density, g/cm3 | 8.6 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 14 | |
| 3.1 |
| Embodied Energy, MJ/kg | 190 | |
| 45 |
| Embodied Water, L/kg | 290 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 220 to 250 | |
| 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 490 | |
| 390 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 26 |
| Strength to Weight: Axial, points | 26 to 29 | |
| 27 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 24 |
| Thermal Shock Resistance, points | 22 to 25 | |
| 17 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.4 | |
| 0 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.1 |
| Chromium (Cr), % | 20 to 23 | |
| 16 to 18 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 59.1 to 65.4 |
| Manganese (Mn), % | 0 to 0.5 | |
| 7.0 to 9.0 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 0 |
| Nickel (Ni), % | 58 to 68.9 | |
| 8.0 to 9.0 |
| Niobium (Nb), % | 3.2 to 4.2 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0.080 to 0.18 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 0.5 | |
| 3.5 to 4.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.4 | |
| 0 |