EN 1.1191 Steel vs. ASTM A387 Grade 91 Class 2
Both EN 1.1191 steel and ASTM A387 grade 91 class 2 are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is EN 1.1191 steel and the bottom bar is ASTM A387 grade 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 200 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 to 17 | |
| 20 |
| Fatigue Strength, MPa | 210 to 290 | |
| 330 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 75 |
| Shear Strength, MPa | 380 to 430 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 700 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 310 to 440 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 600 |
| 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 | 48 | |
| 26 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 7.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 2.6 |
| Embodied Energy, MJ/kg | 19 | |
| 37 |
| Embodied Water, L/kg | 47 | |
| 88 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 83 to 100 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 510 | |
| 580 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 24 |
| Strength to Weight: Bending, points | 21 to 22 | |
| 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 6.9 |
| Thermal Shock Resistance, points | 20 to 22 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0.42 to 0.5 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 0 to 0.4 | |
| 8.0 to 9.5 |
| Iron (Fe), % | 97.3 to 99.08 | |
| 87.3 to 90.3 |
| Manganese (Mn), % | 0.5 to 0.8 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.4 | |
| 0.2 to 0.5 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Vanadium (V), % | 0 | |
| 0.18 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |