ACI-ASTM CF20 Steel vs. AWS E309Nb
Both ACI-ASTM CF20 steel and AWS E309Nb are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is AWS E309Nb.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 50 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 530 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1420 |
| Melting Onset (Solidus), °C | 1410 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 15 |
| Thermal Expansion, µm/m-K | 17 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 2.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 25 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.1 | |
| 4.4 |
| Embodied Energy, MJ/kg | 44 | |
| 64 |
| Embodied Water, L/kg | 150 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 25 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 19 | |
| 22 |
| Strength to Weight: Bending, points | 19 | |
| 21 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 4.0 |
| Thermal Shock Resistance, points | 11 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.12 |
| Chromium (Cr), % | 18 to 21 | |
| 22 to 25 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 64.2 to 74 | |
| 54.8 to 64.8 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.75 |
| Nickel (Ni), % | 8.0 to 11 | |
| 12 to 14 |
| Niobium (Nb), % | 0 | |
| 0.7 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |