EN 1.4020 Stainless Steel vs. ASTM A387 Grade 9 Steel
Both EN 1.4020 stainless steel and ASTM A387 grade 9 steel are iron alloys. They have 77% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is EN 1.4020 stainless steel and the bottom bar is ASTM A387 grade 9 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 340 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 13 to 34 | |
| 20 to 21 |
| Fatigue Strength, MPa | 340 to 540 | |
| 160 to 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 75 |
| Shear Strength, MPa | 510 to 680 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 1130 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 430 to 950 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 890 | |
| 600 |
| Melting Completion (Liquidus), °C | 1390 | |
| 1460 |
| Melting Onset (Solidus), °C | 1350 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 6.5 |
| Density, g/cm3 | 7.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.5 | |
| 2.1 |
| Embodied Energy, MJ/kg | 37 | |
| 28 |
| Embodied Water, L/kg | 150 | |
| 87 |
Common Calculations
| PREN (Pitting Resistance) | 23 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 220 | |
| 83 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 2290 | |
| 140 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 28 to 41 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 25 to 32 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.15 |
| Chromium (Cr), % | 16.5 to 19 | |
| 8.0 to 10 |
| Iron (Fe), % | 62.8 to 71.8 | |
| 87.1 to 90.8 |
| Manganese (Mn), % | 11 to 14 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0.5 to 2.5 | |
| 0 |
| Nitrogen (N), % | 0.2 to 0.45 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |
| Vanadium (V), % | 0 | |
| 0 to 0.040 |