Type 4 Magnetic Alloy vs. ASTM A387 Grade 91 Class 2
Type 4 magnetic alloy belongs to the nickel alloys classification, while ASTM A387 grade 91 class 2 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 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 2.0 to 40 | |
20 |
Fatigue Strength, MPa | 220 to 400 | |
330 |
Poisson's Ratio | 0.31 | |
0.28 |
Shear Modulus, GPa | 73 | |
75 |
Shear Strength, MPa | 420 to 630 | |
420 |
Tensile Strength: Ultimate (UTS), MPa | 620 to 1100 | |
670 |
Tensile Strength: Yield (Proof), MPa | 270 to 1040 | |
470 |
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 | |
1420 |
Specific Heat Capacity, J/kg-K | 440 | |
470 |
Thermal Expansion, µm/m-K | 11 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
8.9 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
10 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 60 | |
7.0 |
Density, g/cm3 | 8.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 10 | |
2.6 |
Embodied Energy, MJ/kg | 140 | |
37 |
Embodied Water, L/kg | 210 | |
88 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 22 to 200 | |
120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 to 2840 | |
580 |
Stiffness to Weight: Axial, points | 12 | |
14 |
Stiffness to Weight: Bending, points | 22 | |
25 |
Strength to Weight: Axial, points | 19 to 35 | |
24 |
Strength to Weight: Bending, points | 18 to 27 | |
22 |
Thermal Shock Resistance, points | 21 to 37 | |
19 |
Alloy Composition
Aluminum (Al), % | 0 | |
0 to 0.020 |
Carbon (C), % | 0 to 0.050 | |
0.080 to 0.12 |
Chromium (Cr), % | 0 to 0.3 | |
8.0 to 9.5 |
Cobalt (Co), % | 0 to 0.5 | |
0 |
Copper (Cu), % | 0 to 0.3 | |
0 |
Iron (Fe), % | 9.5 to 17.5 | |
87.3 to 90.3 |
Manganese (Mn), % | 0 to 0.8 | |
0.3 to 0.6 |
Molybdenum (Mo), % | 3.5 to 6.0 | |
0.85 to 1.1 |
Nickel (Ni), % | 79 to 82 | |
0 to 0.4 |
Niobium (Nb), % | 0 | |
0.060 to 0.1 |
Nitrogen (N), % | 0 | |
0.030 to 0.070 |
Phosphorus (P), % | 0 to 0.010 | |
0 to 0.020 |
Silicon (Si), % | 0 to 0.5 | |
0.2 to 0.5 |
Sulfur (S), % | 0 to 0.020 | |
0 to 0.010 |
Titanium (Ti), % | 0 | |
0 to 0.010 |
Vanadium (V), % | 0 | |
0.18 to 0.25 |
Zirconium (Zr), % | 0 | |
0 to 0.010 |