Cold Finished SAE-AISI 8645 vs. EN 1.4104 +C550 Steel
Both cold finished SAE-AISI 8645 and EN 1.4104 +C550 steel are iron alloys. Both are furnished in the cold worked (strain hardened) condition. They have 83% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is cold finished SAE-AISI 8645 and the bottom bar is EN 1.4104 +C550 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 12 | |
| 17 |
| Fatigue Strength, MPa | 350 | |
| 300 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Shear Strength, MPa | 400 | |
| 400 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 650 |
| Tensile Strength: Yield (Proof), MPa | 560 | |
| 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 860 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 39 | |
| 25 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 8.5 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 2.2 |
| Embodied Energy, MJ/kg | 20 | |
| 30 |
| Embodied Water, L/kg | 50 | |
| 120 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 | |
| 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 840 | |
| 620 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 23 |
| Strength to Weight: Bending, points | 22 | |
| 22 |
| Thermal Diffusivity, mm2/s | 10 | |
| 6.7 |
| Thermal Shock Resistance, points | 20 | |
| 23 |
Alloy Composition
| Carbon (C), % | 0.43 to 0.48 | |
| 0.1 to 0.17 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 15.5 to 17.5 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 78.8 to 84.1 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0.2 to 0.6 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0.15 to 0.35 |