EN 1.4594 Stainless Steel vs. ASTM A387 Grade 91 Class 2
Both EN 1.4594 stainless steel and ASTM A387 grade 91 class 2 are iron alloys. They have 87% 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 EN 1.4594 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, % | 11 to 17 | |
| 20 |
| Fatigue Strength, MPa | 490 to 620 | |
| 330 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 75 |
| Shear Strength, MPa | 620 to 700 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 to 1170 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 810 to 1140 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 820 | |
| 600 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 26 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 7.0 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 2.6 |
| Embodied Energy, MJ/kg | 45 | |
| 37 |
| Embodied Water, L/kg | 130 | |
| 88 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 190 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1660 to 3320 | |
| 580 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 36 to 41 | |
| 24 |
| Strength to Weight: Bending, points | 29 to 31 | |
| 22 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 6.9 |
| Thermal Shock Resistance, points | 34 to 39 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 to 0.070 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 13 to 15 | |
| 8.0 to 9.5 |
| Copper (Cu), % | 1.2 to 2.0 | |
| 0 |
| Iron (Fe), % | 72.6 to 79.5 | |
| 87.3 to 90.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 1.2 to 2.0 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 5.0 to 6.0 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0.15 to 0.6 | |
| 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 0.7 | |
| 0.2 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 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 |