ASTM A387 Grade 91 Class 2 vs. EN 1.7386 Steel
Both ASTM A387 grade 91 class 2 and EN 1.7386 steel are iron alloys. Their average alloy composition is basically identical. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 1.7386 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 | |
| 170 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 18 to 21 |
| Fatigue Strength, MPa | 330 | |
| 170 to 290 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 420 | |
| 340 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 550 to 670 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 240 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 600 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 26 | |
| 26 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.0 |
| Embodied Energy, MJ/kg | 37 | |
| 28 |
| Embodied Water, L/kg | 88 | |
| 88 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 92 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 | |
| 150 to 490 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 20 to 24 |
| Strength to Weight: Bending, points | 22 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 6.9 |
| Thermal Shock Resistance, points | 19 | |
| 15 to 18 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 to 0.040 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 8.0 to 10 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 86.8 to 90.5 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0.25 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |