ASTM A387 Grade 91 Class 2 vs. EN 1.3555 Steel
Both ASTM A387 grade 91 class 2 and EN 1.3555 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 1.3555 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 | |
| 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 540 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1500 |
| Melting Onset (Solidus), °C | 1420 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 460 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 9.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 5.6 |
| Embodied Energy, MJ/kg | 37 | |
| 81 |
| Embodied Water, L/kg | 88 | |
| 90 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 18 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 24 | |
| 27 |
| Strength to Weight: Bending, points | 22 | |
| 23 |
| Thermal Shock Resistance, points | 19 | |
| 22 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0.1 to 0.15 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 3.9 to 4.3 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 85.4 to 87.7 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.15 to 0.35 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 4.0 to 4.5 |
| Nickel (Ni), % | 0 to 0.4 | |
| 3.2 to 3.6 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0.1 to 0.25 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Tungsten (W), % | 0 | |
| 0 to 0.15 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 1.0 to 1.3 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |