ASTM A387 Grade 9 Steel vs. EN 1.4104 Stainless Steel
Both ASTM A387 grade 9 steel and EN 1.4104 stainless steel are iron alloys. They have a moderately high 92% 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 ASTM A387 grade 9 steel and the bottom bar is EN 1.4104 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 20 to 21 | |
| 11 to 23 |
| Fatigue Strength, MPa | 160 to 240 | |
| 230 to 310 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 77 |
| Shear Strength, MPa | 310 to 380 | |
| 400 to 450 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 630 to 750 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 350 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 860 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1410 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 26 | |
| 25 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 9.0 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 8.5 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 2.2 |
| Embodied Energy, MJ/kg | 28 | |
| 30 |
| Embodied Water, L/kg | 87 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 12 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 83 to 110 | |
| 77 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 310 | |
| 310 to 800 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 23 to 27 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 21 to 24 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 6.7 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 22 to 27 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.1 to 0.17 |
| Chromium (Cr), % | 8.0 to 10 | |
| 15.5 to 17.5 |
| Iron (Fe), % | 87.1 to 90.8 | |
| 78.8 to 84.1 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0.2 to 0.6 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0.15 to 0.35 |
| Vanadium (V), % | 0 to 0.040 | |
| 0 |