EN 1.4618 Stainless Steel vs. ASTM A387 Grade 91 Class 2
Both EN 1.4618 stainless steel and ASTM A387 grade 91 class 2 are iron alloys. They have 77% of their average alloy composition in common. There are 32 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 EN 1.4618 stainless steel and the bottom bar is ASTM A387 grade 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 210 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 51 | |
| 20 |
| Fatigue Strength, MPa | 240 to 250 | |
| 330 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 75 |
| Shear Strength, MPa | 480 to 500 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 680 to 700 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 250 to 260 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 900 | |
| 600 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1460 |
| Melting Onset (Solidus), °C | 1360 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 26 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 7.0 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 2.6 |
| Embodied Energy, MJ/kg | 39 | |
| 37 |
| Embodied Water, L/kg | 150 | |
| 88 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 270 to 280 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 to 170 | |
| 580 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 to 25 | |
| 24 |
| Strength to Weight: Bending, points | 22 to 23 | |
| 22 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 6.9 |
| Thermal Shock Resistance, points | 15 to 16 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 to 0.1 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 8.0 to 9.5 |
| Copper (Cu), % | 1.0 to 2.5 | |
| 0 |
| Iron (Fe), % | 62.7 to 72.5 | |
| 87.3 to 90.3 |
| Manganese (Mn), % | 5.5 to 9.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 4.5 to 5.5 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 to 0.15 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 to 0.070 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.2 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Vanadium (V), % | 0 | |
| 0.18 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |