ASTM A387 Grade 12 Steel vs. SAE-AISI 1045 Steel
Both ASTM A387 grade 12 steel and SAE-AISI 1045 steel are iron alloys. They have a very high 98% 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 12 steel and the bottom bar is SAE-AISI 1045 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 160 | |
| 180 to 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 | |
| 13 to 18 |
| Fatigue Strength, MPa | 190 to 230 | |
| 220 to 370 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 300 to 330 | |
| 380 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 520 | |
| 620 to 680 |
| Tensile Strength: Yield (Proof), MPa | 260 to 310 | |
| 330 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 400 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 44 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.4 |
| Embodied Energy, MJ/kg | 21 | |
| 18 |
| Embodied Water, L/kg | 51 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 110 | |
| 84 to 93 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 250 | |
| 300 to 900 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 18 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 17 to 18 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 12 | |
| 14 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.17 | |
| 0.43 to 0.5 |
| Chromium (Cr), % | 0.8 to 1.2 | |
| 0 |
| Iron (Fe), % | 97 to 98.2 | |
| 98.5 to 99 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.050 |