AISI 403 Stainless Steel vs. Nickel 718
AISI 403 stainless steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 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 403 stainless steel and the bottom bar is nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 to 25 | |
| 12 to 50 |
| Fatigue Strength, MPa | 200 to 340 | |
| 460 to 760 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Reduction in Area, % | 47 to 50 | |
| 34 to 64 |
| Shear Modulus, GPa | 76 | |
| 75 |
| Shear Strength, MPa | 340 to 480 | |
| 660 to 950 |
| Tensile Strength: Ultimate (UTS), MPa | 530 to 780 | |
| 930 to 1530 |
| Tensile Strength: Yield (Proof), MPa | 280 to 570 | |
| 510 to 1330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 310 |
| Maximum Temperature: Mechanical, °C | 740 | |
| 980 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1340 |
| Melting Onset (Solidus), °C | 1400 | |
| 1260 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 28 | |
| 11 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 1.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 75 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 13 |
| Embodied Energy, MJ/kg | 27 | |
| 190 |
| Embodied Water, L/kg | 99 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 140 to 390 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 840 | |
| 660 to 4560 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 19 to 28 | |
| 31 to 51 |
| Strength to Weight: Bending, points | 19 to 24 | |
| 25 to 35 |
| Thermal Diffusivity, mm2/s | 7.6 | |
| 3.0 |
| Thermal Shock Resistance, points | 20 to 29 | |
| 27 to 44 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.080 |
| Chromium (Cr), % | 11.5 to 13 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 84.7 to 88.5 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 to 0.6 | |
| 50 to 55 |
| Niobium (Nb), % | 0 | |
| 4.8 to 5.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.65 to 1.2 |