ASTM A387 Grade 12 Steel vs. EN 1.6580 Steel
Both ASTM A387 grade 12 steel and EN 1.6580 steel are iron alloys. They have a very high 97% of their average alloy composition in common.
For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is EN 1.6580 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 160 | |
| 220 to 350 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 | |
| 11 to 19 |
| Fatigue Strength, MPa | 190 to 230 | |
| 310 to 610 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 300 to 330 | |
| 450 to 700 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 520 | |
| 720 to 1170 |
| Tensile Strength: Yield (Proof), MPa | 260 to 310 | |
| 460 to 990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 450 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 44 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 4.3 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 21 | |
| 23 |
| Embodied Water, L/kg | 51 | |
| 59 |
Common Calculations
| PREN (Pitting Resistance) | 2.7 | |
| 3.3 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 110 | |
| 120 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 250 | |
| 560 to 2590 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 18 | |
| 26 to 41 |
| Strength to Weight: Bending, points | 17 to 18 | |
| 23 to 31 |
| Thermal Diffusivity, mm2/s | 12 | |
| 11 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 21 to 34 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.17 | |
| 0.26 to 0.34 |
| Chromium (Cr), % | 0.8 to 1.2 | |
| 1.8 to 2.2 |
| Iron (Fe), % | 97 to 98.2 | |
| 93.7 to 95.5 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0.3 to 0.5 |
| Nickel (Ni), % | 0 | |
| 1.8 to 2.2 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.035 |