Type 4 Magnetic Alloy vs. ASTM A387 Grade 9 Steel
Type 4 magnetic alloy belongs to the nickel alloys classification, while ASTM A387 grade 9 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is Type 4 magnetic alloy and the bottom bar is ASTM A387 grade 9 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 2.0 to 40 | |
| 20 to 21 |
| Fatigue Strength, MPa | 220 to 400 | |
| 160 to 240 |
| Poisson's Ratio | 0.31 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Shear Strength, MPa | 420 to 630 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 1100 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 270 to 1040 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 900 | |
| 600 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1370 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 6.5 |
| Density, g/cm3 | 8.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 2.1 |
| Embodied Energy, MJ/kg | 140 | |
| 28 |
| Embodied Water, L/kg | 210 | |
| 87 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 22 to 200 | |
| 83 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 to 2840 | |
| 140 to 310 |
| Stiffness to Weight: Axial, points | 12 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 19 to 35 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 18 to 27 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 21 to 37 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0 to 0.3 | |
| 8.0 to 10 |
| Cobalt (Co), % | 0 to 0.5 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 9.5 to 17.5 | |
| 87.1 to 90.8 |
| Manganese (Mn), % | 0 to 0.8 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 3.5 to 6.0 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 79 to 82 | |
| 0 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.025 |
| Vanadium (V), % | 0 | |
| 0 to 0.040 |