AWS E409Nb vs. AWS ER80S-B8
Both AWS E409Nb and AWS ER80S-B8 are iron alloys. Both are furnished in the post-weld heat treated (PWHT) condition. They have a very high 95% of their average alloy composition in common.
For each property being compared, the top bar is AWS E409Nb and the bottom bar is AWS ER80S-B8.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 23 | |
| 19 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 500 | |
| 630 |
| Tensile Strength: Yield (Proof), MPa | 380 | |
| 530 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 25 | |
| 26 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 8.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 9.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 2.0 |
| Embodied Energy, MJ/kg | 42 | |
| 28 |
| Embodied Water, L/kg | 100 | |
| 89 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 | |
| 720 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 18 | |
| 22 |
| Strength to Weight: Bending, points | 18 | |
| 21 |
| Thermal Diffusivity, mm2/s | 6.8 | |
| 6.9 |
| Thermal Shock Resistance, points | 14 | |
| 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.12 | |
| 0 to 0.1 |
| Chromium (Cr), % | 11 to 14 | |
| 8.0 to 10.5 |
| Copper (Cu), % | 0 to 0.75 | |
| 0 to 0.35 |
| Iron (Fe), % | 80.2 to 88.5 | |
| 85.6 to 90.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0.8 to 1.2 |
| Nickel (Ni), % | 0 to 0.6 | |
| 0 to 0.5 |
| Niobium (Nb), % | 0.5 to 1.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |
| Residuals, % | 0 | |
| 0 to 0.5 |