AWS E308H vs. AWS E630
Both AWS E308H and AWS E630 are iron alloys. They have a moderately high 91% of their average alloy composition in common.
For each property being compared, the top bar is AWS E308H and the bottom bar is AWS E630.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 40 | |
| 8.0 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 620 | |
| 1040 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1430 |
| Melting Onset (Solidus), °C | 1380 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 17 |
| Thermal Expansion, µm/m-K | 14 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 14 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 2.8 |
| Embodied Energy, MJ/kg | 46 | |
| 40 |
| Embodied Water, L/kg | 150 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 21 | |
| 18 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 | |
| 37 |
| Strength to Weight: Bending, points | 21 | |
| 29 |
| Thermal Diffusivity, mm2/s | 4.2 | |
| 4.5 |
| Thermal Shock Resistance, points | 16 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0.040 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 18 to 21 | |
| 16 to 16.8 |
| Copper (Cu), % | 0 to 0.75 | |
| 3.3 to 4.0 |
| Iron (Fe), % | 62.9 to 72.5 | |
| 71.6 to 75.9 |
| Manganese (Mn), % | 0.5 to 2.5 | |
| 0.25 to 0.75 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 to 0.75 |
| Nickel (Ni), % | 9.0 to 11 | |
| 4.5 to 5.0 |
| Niobium (Nb), % | 0 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |