ASTM A387 Grade 9 Steel vs. AWS E240
Both ASTM A387 grade 9 steel and AWS E240 are iron alloys. They have 74% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 9 steel and the bottom bar is AWS E240.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 20 to 21 | |
| 17 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 290 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1390 |
| Melting Onset (Solidus), °C | 1410 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 26 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 14 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 3.0 |
| Embodied Energy, MJ/kg | 28 | |
| 42 |
| Embodied Water, L/kg | 87 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 12 | |
| 22 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 28 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 24 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 3.9 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 19 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.060 |
| Chromium (Cr), % | 8.0 to 10 | |
| 17 to 19 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 87.1 to 90.8 | |
| 58.6 to 68.4 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 10.5 to 13.5 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 to 0.75 |
| Nickel (Ni), % | 0 | |
| 4.0 to 6.0 |
| Nitrogen (N), % | 0 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 to 0.040 | |
| 0 |