EN 1.4415 Stainless Steel vs. ASTM A387 Grade 9 Steel
Both EN 1.4415 stainless steel and ASTM A387 grade 9 steel 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 9 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 17 to 20 | |
| 20 to 21 |
| Fatigue Strength, MPa | 470 to 510 | |
| 160 to 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 75 |
| Shear Strength, MPa | 520 to 570 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 930 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 730 to 840 | |
| 230 to 350 |
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 | |
| 1410 |
| 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 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 6.5 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 2.1 |
| Embodied Energy, MJ/kg | 51 | |
| 28 |
| Embodied Water, L/kg | 120 | |
| 87 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 160 | |
| 83 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1350 to 1790 | |
| 140 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 33 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 25 to 27 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 5.1 | |
| 6.9 |
| Thermal Shock Resistance, points | 30 to 34 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.15 |
| Chromium (Cr), % | 11.5 to 13.5 | |
| 8.0 to 10 |
| Iron (Fe), % | 75.9 to 82.4 | |
| 87.1 to 90.8 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 1.5 to 2.5 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 4.5 to 6.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.025 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.1 to 0.5 | |
| 0 to 0.040 |