ASTM A387 Grade 11 Steel vs. EN 1.7221 Steel
Both ASTM A387 grade 11 steel and EN 1.7221 steel are iron alloys. Their average alloy composition is basically identical. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 11 steel and the bottom bar is EN 1.7221 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 200 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 | |
| 11 to 17 |
| Fatigue Strength, MPa | 200 to 250 | |
| 290 to 390 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 650 to 780 |
| Tensile Strength: Yield (Proof), MPa | 270 to 350 | |
| 430 to 630 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 420 |
| 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 | 39 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.5 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 2.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 | |
| 20 |
| Embodied Water, L/kg | 53 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 130 | |
| 83 to 98 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 200 to 320 | |
| 490 to 1050 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 23 to 27 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 21 to 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 12 |
| Thermal Shock Resistance, points | 15 to 18 | |
| 19 to 23 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.17 | |
| 0.22 to 0.29 |
| Chromium (Cr), % | 1.0 to 1.5 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 96.2 to 97.6 | |
| 96.8 to 98.3 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0.45 to 0.65 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.5 to 0.8 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |