AWS ER90S-B3 vs. AWS ER70S-B2L
Both AWS ER90S-B3 and AWS ER70S-B2L 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 ER90S-B3 and the bottom bar is AWS ER70S-B2L.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 22 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 690 | |
| 590 |
| Tensile Strength: Yield (Proof), MPa | 620 | |
| 450 |
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 | 7.7 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.1 | |
| 3.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.6 |
| Embodied Energy, MJ/kg | 24 | |
| 21 |
| Embodied Water, L/kg | 60 | |
| 54 |
Common Calculations
| PREN (Pitting Resistance) | 6.0 | |
| 3.1 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1000 | |
| 530 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 25 | |
| 21 |
| Strength to Weight: Bending, points | 22 | |
| 20 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 20 | |
| 17 |
Alloy Composition
| Carbon (C), % | 0.070 to 0.12 | |
| 0 to 0.050 |
| Chromium (Cr), % | 2.3 to 2.7 | |
| 1.2 to 1.5 |
| Copper (Cu), % | 0 to 0.35 | |
| 0 to 0.35 |
| Iron (Fe), % | 93.5 to 95.9 | |
| 95.3 to 97.6 |
| Manganese (Mn), % | 0.4 to 0.7 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0.9 to 1.2 | |
| 0.4 to 0.65 |
| 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 |