Nickel 725 vs. EN 1.4938 Stainless Steel
Nickel 725 belongs to the nickel alloys classification, while EN 1.4938 stainless steel belongs to the iron alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is nickel 725 and the bottom bar is EN 1.4938 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 | |
| 16 to 17 |
| Fatigue Strength, MPa | 260 | |
| 390 to 520 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 76 |
| Shear Strength, MPa | 580 | |
| 540 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 860 | |
| 870 to 1030 |
| Tensile Strength: Yield (Proof), MPa | 350 | |
| 640 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 750 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1460 |
| Melting Onset (Solidus), °C | 1270 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.5 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.6 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 10 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 3.3 |
| Embodied Energy, MJ/kg | 190 | |
| 47 |
| Embodied Water, L/kg | 270 | |
| 110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 300 | |
| 1050 to 1920 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 31 to 37 |
| Strength to Weight: Bending, points | 24 | |
| 26 to 29 |
| Thermal Shock Resistance, points | 23 | |
| 30 to 35 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.35 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 19 to 22.5 | |
| 11 to 12.5 |
| Iron (Fe), % | 2.3 to 15.3 | |
| 80.5 to 84.8 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 7.0 to 9.5 | |
| 1.5 to 2.0 |
| Nickel (Ni), % | 55 to 59 | |
| 2.0 to 3.0 |
| Niobium (Nb), % | 2.8 to 4.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0.020 to 0.040 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.2 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |
| Titanium (Ti), % | 1.0 to 1.7 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.4 |