EN 1.1127 Steel vs. SAE-AISI 8645 Steel
Both EN 1.1127 steel and SAE-AISI 8645 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1127 steel and the bottom bar is SAE-AISI 8645 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 230 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 to 25 | |
| 12 to 23 |
| Fatigue Strength, MPa | 280 to 370 | |
| 280 to 350 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 420 to 480 | |
| 380 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 790 | |
| 600 to 670 |
| Tensile Strength: Yield (Proof), MPa | 410 to 580 | |
| 390 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 | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 49 | |
| 39 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 2.6 |
| 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 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 to 140 | |
| 77 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 440 to 880 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 28 | |
| 21 to 24 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 10 |
| Thermal Shock Resistance, points | 21 to 25 | |
| 18 to 20 |
Alloy Composition
| Carbon (C), % | 0.34 to 0.42 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 96.6 to 98.1 | |
| 96.5 to 97.7 |
| Manganese (Mn), % | 1.4 to 1.7 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.040 |