EN 1.1170 Steel vs. SAE-AISI 81B45 Steel
Both EN 1.1170 steel and SAE-AISI 81B45 steel are iron alloys. Their average alloy composition is basically identical. 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 EN 1.1170 steel and the bottom bar is SAE-AISI 81B45 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 210 | |
| 160 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 to 17 | |
| 12 to 24 |
| Fatigue Strength, MPa | 220 to 330 | |
| 250 to 350 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 390 to 450 | |
| 340 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 730 | |
| 540 to 670 |
| Tensile Strength: Yield (Proof), MPa | 330 to 500 | |
| 350 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| 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 | 50 | |
| 40 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
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 | 2.1 | |
| 2.3 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 20 |
| Embodied Water, L/kg | 49 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 to 100 | |
| 77 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 to 670 | |
| 320 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 26 | |
| 19 to 24 |
| Strength to Weight: Bending, points | 21 to 23 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 11 |
| Thermal Shock Resistance, points | 20 to 23 | |
| 17 to 21 |
Alloy Composition
| Boron (B), % | 0 | |
| 0.00050 to 0.0030 |
| Carbon (C), % | 0.25 to 0.32 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0.35 to 0.55 |
| Iron (Fe), % | 96.7 to 98.5 | |
| 97 to 98 |
| Manganese (Mn), % | 1.3 to 1.7 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0.080 to 0.15 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.4 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.040 |