EN 1.4640 Stainless Steel vs. ASTM A387 Grade 9 Steel
Both EN 1.4640 stainless steel and ASTM A387 grade 9 steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is ASTM A387 grade 9 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 200 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 51 | |
| 20 to 21 |
| Fatigue Strength, MPa | 230 to 250 | |
| 160 to 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 75 |
| Shear Strength, MPa | 440 to 460 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 600 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1410 |
| 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 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.1 |
| Embodied Energy, MJ/kg | 40 | |
| 28 |
| Embodied Water, L/kg | 150 | |
| 87 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 83 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 140 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 21 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 6.9 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0 to 0.15 |
| Chromium (Cr), % | 18 to 19 | |
| 8.0 to 10 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 87.1 to 90.8 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.025 |
| Vanadium (V), % | 0 | |
| 0 to 0.040 |