SAE-AISI 81B45 Steel vs. ASTM A266 Carbon Steel
Both SAE-AISI 81B45 steel and ASTM A266 carbon steel are iron alloys. 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 SAE-AISI 81B45 steel and the bottom bar is ASTM A266 carbon steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 200 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 24 | |
| 21 to 26 |
| Fatigue Strength, MPa | 250 to 350 | |
| 170 to 200 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 340 to 400 | |
| 320 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 670 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 350 to 560 | |
| 230 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 40 | |
| 51 to 52 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.1 to 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.4 |
| Embodied Energy, MJ/kg | 20 | |
| 18 to 19 |
| Embodied Water, L/kg | 49 | |
| 46 to 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 110 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 320 to 840 | |
| 140 to 230 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 to 24 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 19 to 22 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 11 | |
| 14 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 16 to 19 |