ASTM A387 Grade 91 Class 2 vs. EN 1.1170 Steel
Both ASTM A387 grade 91 class 2 and EN 1.1170 steel 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 ASTM A387 grade 91 class 2 and the bottom bar is EN 1.1170 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 | |
| 180 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 16 to 17 |
| Fatigue Strength, MPa | 330 | |
| 220 to 330 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 73 |
| Shear Strength, MPa | 420 | |
| 390 to 450 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 640 to 730 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 330 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 400 |
| 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 | 26 | |
| 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 1.5 |
| Embodied Energy, MJ/kg | 37 | |
| 19 |
| Embodied Water, L/kg | 88 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 91 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 | |
| 290 to 670 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 24 | |
| 23 to 26 |
| Strength to Weight: Bending, points | 22 | |
| 21 to 23 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 13 |
| Thermal Shock Resistance, points | 19 | |
| 20 to 23 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0.25 to 0.32 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 0 to 0.4 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 96.7 to 98.5 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 1.3 to 1.7 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.035 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |