ASTM A387 Grade 91 Class 2 vs. EN 1.4612 Stainless Steel
Both ASTM A387 grade 91 class 2 and EN 1.4612 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 26 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 1.4612 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 11 |
| Fatigue Strength, MPa | 330 | |
| 860 to 950 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 76 |
| Shear Strength, MPa | 420 | |
| 1010 to 1110 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 1690 to 1850 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 1570 to 1730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 790 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 16 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 3.6 |
| Embodied Energy, MJ/kg | 37 | |
| 50 |
| Embodied Water, L/kg | 88 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 190 to 210 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 60 to 65 |
| Strength to Weight: Bending, points | 22 | |
| 40 to 43 |
| Thermal Shock Resistance, points | 19 | |
| 58 to 63 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 1.4 to 1.8 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.015 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 11 to 12.5 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 71.5 to 75.5 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 1.8 to 2.3 |
| Nickel (Ni), % | 0 to 0.4 | |
| 10.2 to 11.3 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.010 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.0050 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0.2 to 0.5 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |