AWS E630 vs. AWS E309Nb
Both AWS E630 and AWS E309Nb are iron alloys. They have 83% of their average alloy composition in common.
For each property being compared, the top bar is AWS E630 and the bottom bar is AWS E309Nb.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 8.0 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 1040 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1420 |
| Melting Onset (Solidus), °C | 1380 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 17 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 2.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 25 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 4.4 |
| Embodied Energy, MJ/kg | 40 | |
| 64 |
| Embodied Water, L/kg | 140 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 25 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 37 | |
| 22 |
| Strength to Weight: Bending, points | 29 | |
| 21 |
| Thermal Diffusivity, mm2/s | 4.5 | |
| 4.0 |
| Thermal Shock Resistance, points | 28 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.12 |
| Chromium (Cr), % | 16 to 16.8 | |
| 22 to 25 |
| Copper (Cu), % | 3.3 to 4.0 | |
| 0 to 0.75 |
| Iron (Fe), % | 71.6 to 75.9 | |
| 54.8 to 64.8 |
| Manganese (Mn), % | 0.25 to 0.75 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 to 0.75 |
| Nickel (Ni), % | 4.5 to 5.0 | |
| 12 to 14 |
| Niobium (Nb), % | 0.15 to 0.3 | |
| 0.7 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |