SAE-AISI 8645 Steel vs. EN 1.1181 Steel
Both SAE-AISI 8645 steel and EN 1.1181 steel are iron alloys. 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 SAE-AISI 8645 steel and the bottom bar is EN 1.1181 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 200 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 23 | |
| 19 to 20 |
| Fatigue Strength, MPa | 280 to 350 | |
| 190 to 260 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 380 to 400 | |
| 350 to 390 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 670 | |
| 560 to 620 |
| Tensile Strength: Yield (Proof), MPa | 390 to 560 | |
| 280 to 380 |
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 | 39 | |
| 42 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.4 |
| Embodied Energy, MJ/kg | 20 | |
| 19 |
| Embodied Water, L/kg | 50 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 120 | |
| 90 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 to 840 | |
| 210 to 380 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 24 | |
| 20 to 22 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 19 to 21 |
| Thermal Diffusivity, mm2/s | 10 | |
| 11 |
| Thermal Shock Resistance, points | 18 to 20 | |
| 19 to 21 |
Alloy Composition
| Carbon (C), % | 0.43 to 0.48 | |
| 0.32 to 0.39 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 to 0.4 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 97.4 to 99.18 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.035 |