SAE-AISI 8645 Steel vs. Type 4 Magnetic Alloy
SAE-AISI 8645 steel belongs to the iron alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is Type 4 magnetic alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 23 | |
| 2.0 to 40 |
| Fatigue Strength, MPa | 280 to 350 | |
| 220 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.31 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 380 to 400 | |
| 420 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 670 | |
| 620 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 390 to 560 | |
| 270 to 1040 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 900 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 3.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 60 |
| Density, g/cm3 | 7.8 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 10 |
| Embodied Energy, MJ/kg | 20 | |
| 140 |
| Embodied Water, L/kg | 50 | |
| 210 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 120 | |
| 22 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 to 840 | |
| 190 to 2840 |
| Stiffness to Weight: Axial, points | 13 | |
| 12 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 21 to 24 | |
| 19 to 35 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 18 to 27 |
| Thermal Shock Resistance, points | 18 to 20 | |
| 21 to 37 |
Alloy Composition
| Carbon (C), % | 0.43 to 0.48 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 to 0.3 |
| Cobalt (Co), % | 0 | |
| 0 to 0.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 9.5 to 17.5 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 0.8 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 3.5 to 6.0 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 79 to 82 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.010 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.020 |