AWS E349 vs. AWS E309
Both AWS E349 and AWS E309 are iron alloys. Both are furnished in the as-welded condition. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is AWS E349 and the bottom bar is AWS E309.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 29 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.27 |
| Shear Modulus, GPa | 78 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 770 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1410 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 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 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 4.9 | |
| 3.7 |
| Embodied Energy, MJ/kg | 72 | |
| 52 |
| Embodied Water, L/kg | 150 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 24 | |
| 25 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 | |
| 22 |
| Strength to Weight: Bending, points | 24 | |
| 21 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 4.0 |
| Thermal Shock Resistance, points | 20 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.13 | |
| 0 to 0.15 |
| Chromium (Cr), % | 18 to 21 | |
| 22 to 25 |
| Copper (Cu), % | 0 to 0.75 | |
| 0 to 0.75 |
| Iron (Fe), % | 60.5 to 71.1 | |
| 55.8 to 65.5 |
| Manganese (Mn), % | 0.5 to 2.5 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0.35 to 0.65 | |
| 0 to 0.75 |
| Nickel (Ni), % | 8.0 to 10 | |
| 12 to 14 |
| Niobium (Nb), % | 0.75 to 1.2 | |
| 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 |
| Titanium (Ti), % | 0 to 0.15 | |
| 0 |
| Tungsten (W), % | 1.3 to 1.8 | |
| 0 |
| Vanadium (V), % | 0.1 to 0.3 | |
| 0 |