ASTM A387 Grade 9 Steel vs. SAE-AISI 1141 Steel
Both ASTM A387 grade 9 steel and SAE-AISI 1141 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 (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 SAE-AISI 1141 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 210 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 21 | |
| 11 to 17 |
| Fatigue Strength, MPa | 160 to 240 | |
| 270 to 430 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 72 |
| Shear Strength, MPa | 310 to 380 | |
| 460 to 480 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 740 to 810 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 400 to 700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 9.0 | |
| 10 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 1.4 |
| Embodied Energy, MJ/kg | 28 | |
| 19 |
| Embodied Water, L/kg | 87 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 83 to 110 | |
| 86 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 310 | |
| 430 to 1290 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 26 to 29 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 23 to 25 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 14 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 24 to 26 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.37 to 0.45 |
| Chromium (Cr), % | 8.0 to 10 | |
| 0 |
| Iron (Fe), % | 87.1 to 90.8 | |
| 97.7 to 98.2 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 1.4 to 1.7 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0.080 to 0.13 |
| Vanadium (V), % | 0 to 0.040 | |
| 0 |