ASTM A372 Grade H Steel vs. EN 1.7725 Steel
Both ASTM A372 grade H steel and EN 1.7725 steel are iron alloys. They have a very high 99% of their average alloy composition in common. 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 A372 grade H steel and the bottom bar is EN 1.7725 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 280 | |
| 250 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 22 | |
| 14 |
| Fatigue Strength, MPa | 310 to 380 | |
| 390 to 550 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 910 | |
| 830 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 430 to 550 | |
| 610 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 440 |
| 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 | 45 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 2.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.8 |
| Embodied Energy, MJ/kg | 20 | |
| 24 |
| Embodied Water, L/kg | 49 | |
| 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 160 | |
| 110 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 500 to 810 | |
| 980 to 1940 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 32 | |
| 29 to 35 |
| Strength to Weight: Bending, points | 21 to 27 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 12 | |
| 11 |
| Thermal Shock Resistance, points | 19 to 27 | |
| 24 to 29 |
Alloy Composition
| Carbon (C), % | 0.3 to 0.4 | |
| 0.27 to 0.34 |
| Chromium (Cr), % | 0.4 to 0.65 | |
| 1.3 to 1.7 |
| Iron (Fe), % | 97.3 to 98.3 | |
| 95.7 to 97.5 |
| Manganese (Mn), % | 0.75 to 1.1 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0.3 to 0.5 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.050 to 0.15 |