EN 1.1127 Steel vs. ASTM A372 Grade H Steel
Both EN 1.1127 steel and ASTM A372 grade H steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1127 steel and the bottom bar is ASTM A372 grade H steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 230 | |
| 200 to 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 to 25 | |
| 20 to 22 |
| Fatigue Strength, MPa | 280 to 370 | |
| 310 to 380 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 420 to 480 | |
| 410 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 790 | |
| 650 to 910 |
| Tensile Strength: Yield (Proof), MPa | 410 to 580 | |
| 430 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 49 | |
| 45 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 2.3 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 20 |
| Embodied Water, L/kg | 49 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 to 140 | |
| 130 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 440 to 880 | |
| 500 to 810 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 28 | |
| 23 to 32 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 21 to 27 |
| Thermal Diffusivity, mm2/s | 13 | |
| 12 |
| Thermal Shock Resistance, points | 21 to 25 | |
| 19 to 27 |
Alloy Composition
| Carbon (C), % | 0.34 to 0.42 | |
| 0.3 to 0.4 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0.4 to 0.65 |
| Iron (Fe), % | 96.6 to 98.1 | |
| 97.3 to 98.3 |
| Manganese (Mn), % | 1.4 to 1.7 | |
| 0.75 to 1.1 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.010 |