SAE-AISI 1137 Steel vs. ASTM A387 Grade 9 Steel
Both SAE-AISI 1137 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 (2, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1137 steel and the bottom bar is ASTM A387 grade 9 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 210 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 20 to 21 |
| Fatigue Strength, MPa | 250 to 400 | |
| 160 to 240 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Shear Strength, MPa | 430 to 460 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 760 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 370 to 650 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 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 | 51 | |
| 26 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 10 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 12 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 2.1 |
| Embodied Energy, MJ/kg | 19 | |
| 28 |
| Embodied Water, L/kg | 48 | |
| 87 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 81 to 100 | |
| 83 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 360 to 1130 | |
| 140 to 310 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 27 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 14 | |
| 6.9 |
| Thermal Shock Resistance, points | 21 to 23 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.39 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0 | |
| 8.0 to 10 |
| Iron (Fe), % | 97.8 to 98.3 | |
| 87.1 to 90.8 |
| Manganese (Mn), % | 1.4 to 1.7 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0.080 to 0.13 | |
| 0 to 0.025 |
| Vanadium (V), % | 0 | |
| 0 to 0.040 |