ASTM A387 Grade 91 Class 2 vs. EN 1.4606 Stainless Steel
Both ASTM A387 grade 91 class 2 and EN 1.4606 stainless steel are iron alloys. They have 65% 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 1.4606 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 23 to 39 |
| Fatigue Strength, MPa | 330 | |
| 240 to 420 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 420 | |
| 410 to 640 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 600 to 1020 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 280 to 630 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 910 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 14 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 2.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 26 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 6.0 |
| Embodied Energy, MJ/kg | 37 | |
| 87 |
| Embodied Water, L/kg | 88 | |
| 170 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 190 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 | |
| 200 to 1010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 24 | |
| 21 to 36 |
| Strength to Weight: Bending, points | 22 | |
| 20 to 28 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 3.7 |
| Thermal Shock Resistance, points | 19 | |
| 21 to 35 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 to 0.35 |
| Boron (B), % | 0 | |
| 0.0010 to 0.010 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.080 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 13 to 16 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 49.2 to 59 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 1.0 to 1.5 |
| Nickel (Ni), % | 0 to 0.4 | |
| 24 to 27 |
| 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 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 to 0.010 | |
| 1.9 to 2.3 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0.1 to 0.5 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |