Cold Drawn SAE-AISI 1144 vs. Cold Finished SAE-AISI 81B45
Both cold drawn SAE-AISI 1144 and cold finished SAE-AISI 81B45 are iron alloys. Both are furnished in the cold worked (strain hardened) condition. They have a very high 99% of their average alloy composition in common. There are 31 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 cold drawn SAE-AISI 1144 and the bottom bar is cold finished SAE-AISI 81B45.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 230 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 | |
| 12 |
| Fatigue Strength, MPa | 430 | |
| 350 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 510 | |
| 400 |
| Tensile Strength: Ultimate (UTS), MPa | 840 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 690 | |
| 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 51 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 2.3 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 20 |
| Embodied Water, L/kg | 47 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 | |
| 77 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1290 | |
| 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 30 | |
| 24 |
| Strength to Weight: Bending, points | 25 | |
| 22 |
| Thermal Diffusivity, mm2/s | 14 | |
| 11 |
| Thermal Shock Resistance, points | 24 | |
| 21 |
Alloy Composition
| Boron (B), % | 0 | |
| 0.00050 to 0.0030 |
| Carbon (C), % | 0.4 to 0.48 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 | |
| 0.35 to 0.55 |
| Iron (Fe), % | 97.5 to 98 | |
| 97 to 98 |
| Manganese (Mn), % | 1.4 to 1.7 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.080 to 0.15 |
| Nickel (Ni), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0.24 to 0.33 | |
| 0 to 0.040 |