Nickel 686 vs. EN 1.4404 Stainless Steel
Nickel 686 belongs to the nickel alloys classification, while EN 1.4404 stainless steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 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 686 and the bottom bar is EN 1.4404 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 51 | |
| 14 to 43 |
| Fatigue Strength, MPa | 410 | |
| 220 to 320 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Shear Strength, MPa | 560 | |
| 420 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 780 | |
| 600 to 900 |
| Tensile Strength: Yield (Proof), MPa | 350 | |
| 240 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 950 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1440 |
| Melting Onset (Solidus), °C | 1340 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 9.8 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.4 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.4 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 70 | |
| 19 |
| Density, g/cm3 | 9.0 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 12 | |
| 3.8 |
| Embodied Energy, MJ/kg | 170 | |
| 52 |
| Embodied Water, L/kg | 300 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 320 | |
| 110 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 | |
| 140 to 800 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 21 to 32 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 26 |
| Thermal Diffusivity, mm2/s | 2.6 | |
| 4.0 |
| Thermal Shock Resistance, points | 21 | |
| 13 to 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0 to 0.030 |
| Chromium (Cr), % | 19 to 23 | |
| 16.5 to 18.5 |
| Iron (Fe), % | 0 to 5.0 | |
| 62.8 to 71.5 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 15 to 17 | |
| 2.0 to 2.5 |
| Nickel (Ni), % | 49.5 to 63 | |
| 10 to 13 |
| Nitrogen (N), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.080 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0.020 to 0.25 | |
| 0 |
| Tungsten (W), % | 3.0 to 4.4 | |
| 0 |