AWS E409Nb vs. S21640 Stainless Steel
Both AWS E409Nb and S21640 stainless steel are iron alloys. They have 83% of their average alloy composition in common. 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 AWS E409Nb and the bottom bar is S21640 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 23 | |
| 46 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 500 | |
| 740 |
| Tensile Strength: Yield (Proof), MPa | 380 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1410 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 25 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 2.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 17 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 3.6 |
| Embodied Energy, MJ/kg | 42 | |
| 51 |
| Embodied Water, L/kg | 100 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 26 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 280 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 | |
| 300 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 18 | |
| 27 |
| Strength to Weight: Bending, points | 18 | |
| 23 |
| Thermal Diffusivity, mm2/s | 6.8 | |
| 4.0 |
| Thermal Shock Resistance, points | 14 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.12 | |
| 0 to 0.080 |
| Chromium (Cr), % | 11 to 14 | |
| 17.5 to 19.5 |
| Copper (Cu), % | 0 to 0.75 | |
| 0 |
| Iron (Fe), % | 80.2 to 88.5 | |
| 63 to 74.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 3.5 to 6.5 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0.5 to 2.0 |
| Nickel (Ni), % | 0 to 0.6 | |
| 4.0 to 6.5 |
| Niobium (Nb), % | 0.5 to 1.5 | |
| 0.1 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0.080 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |