EN 1.4415 Stainless Steel vs. ASTM A387 Grade 91 Class 2
Both EN 1.4415 stainless steel and ASTM A387 grade 91 class 2 are iron alloys. They have 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 (3, in this case) are not shown.
For each property being compared, the top bar is EN 1.4415 stainless steel and the bottom bar is ASTM A387 grade 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 17 to 20 | |
| 20 |
| Fatigue Strength, MPa | 470 to 510 | |
| 330 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 75 |
| Shear Strength, MPa | 520 to 570 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 930 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 730 to 840 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 790 | |
| 600 |
| 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 | 19 | |
| 26 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 7.0 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 2.6 |
| Embodied Energy, MJ/kg | 51 | |
| 37 |
| Embodied Water, L/kg | 120 | |
| 88 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 160 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1350 to 1790 | |
| 580 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 33 | |
| 24 |
| Strength to Weight: Bending, points | 25 to 27 | |
| 22 |
| Thermal Diffusivity, mm2/s | 5.1 | |
| 6.9 |
| Thermal Shock Resistance, points | 30 to 34 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 to 0.030 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 11.5 to 13.5 | |
| 8.0 to 9.5 |
| Iron (Fe), % | 75.9 to 82.4 | |
| 87.3 to 90.3 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 1.5 to 2.5 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 4.5 to 6.5 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.2 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 to 0.010 |
| Vanadium (V), % | 0.1 to 0.5 | |
| 0.18 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |