AWS E309Nb vs. AWS E309H
Both AWS E309Nb and AWS E309H are iron alloys. Both are furnished in the as-welded condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is AWS E309Nb and the bottom bar is AWS E309H.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.27 |
| Shear Modulus, GPa | 78 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 620 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1410 |
| Melting Onset (Solidus), °C | 1380 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.1 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.4 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 25 | |
| 20 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 4.4 | |
| 3.7 |
| Embodied Energy, MJ/kg | 64 | |
| 52 |
| Embodied Water, L/kg | 180 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 25 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 | |
| 22 |
| Strength to Weight: Bending, points | 21 | |
| 21 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 16 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.12 | |
| 0.040 to 0.15 |
| Chromium (Cr), % | 22 to 25 | |
| 22 to 25 |
| Copper (Cu), % | 0 to 0.75 | |
| 0 to 0.75 |
| Iron (Fe), % | 54.8 to 64.8 | |
| 55.8 to 65.5 |
| Manganese (Mn), % | 0.5 to 2.5 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 to 0.75 |
| Nickel (Ni), % | 12 to 14 | |
| 12 to 14 |
| Niobium (Nb), % | 0.7 to 1.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |