AWS ER80S-B2 vs. AWS ER90S-B3
Both AWS ER80S-B2 and AWS ER90S-B3 are iron alloys. Both are furnished in the post-weld heat treated (PWHT) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is AWS ER80S-B2 and the bottom bar is AWS ER90S-B3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 21 | |
| 19 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 620 | |
| 690 |
| Tensile Strength: Yield (Proof), MPa | 540 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 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 | 40 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.0 | |
| 4.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 21 | |
| 24 |
| Embodied Water, L/kg | 54 | |
| 60 |
Common Calculations
| PREN (Pitting Resistance) | 3.1 | |
| 6.0 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 760 | |
| 1000 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 | |
| 25 |
| Strength to Weight: Bending, points | 21 | |
| 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 18 | |
| 20 |
Alloy Composition
| Carbon (C), % | 0.070 to 0.12 | |
| 0.070 to 0.12 |
| Chromium (Cr), % | 1.2 to 1.5 | |
| 2.3 to 2.7 |
| Copper (Cu), % | 0 to 0.35 | |
| 0 to 0.35 |
| Iron (Fe), % | 95.2 to 97.5 | |
| 93.5 to 95.9 |
| Manganese (Mn), % | 0.4 to 0.7 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0.4 to 0.65 | |
| 0.9 to 1.2 |
| Nickel (Ni), % | 0 to 0.2 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.4 to 0.7 | |
| 0.4 to 0.7 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.025 |
| Residuals, % | 0 | |
| 0 to 0.5 |