EN 1.7321 Steel vs. AWS ER70S-A1
Both EN 1.7321 steel and AWS ER70S-A1 are iron alloys. Their average alloy composition is basically identical. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is EN 1.7321 steel and the bottom bar is AWS ER70S-A1.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 490 to 1460 | |
| 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 45 | |
| 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.5 | |
| 2.5 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 20 | |
| 20 |
| Embodied Water, L/kg | 50 | |
| 48 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 to 52 | |
| 21 |
| Strength to Weight: Bending, points | 18 to 36 | |
| 20 |
| Thermal Diffusivity, mm2/s | 12 | |
| 14 |
| Thermal Shock Resistance, points | 14 to 43 | |
| 17 |
Alloy Composition
| Carbon (C), % | 0.17 to 0.23 | |
| 0 to 0.12 |
| Chromium (Cr), % | 0.3 to 0.6 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.35 |
| Iron (Fe), % | 97.1 to 98.4 | |
| 96.1 to 99.3 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0 to 1.3 |
| Molybdenum (Mo), % | 0.4 to 0.5 | |
| 0.4 to 0.65 |
| Nickel (Ni), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.3 | |
| 0.3 to 0.7 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.025 |
| Residuals, % | 0 | |
| 0 to 0.5 |