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Type 2 Magnetic Alloy vs. R30021 Cobalt

Type 2 magnetic alloy belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Type 2 magnetic alloy and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 2.0 to 38
9.0
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
86
Tensile Strength: Ultimate (UTS), MPa 510 to 910
700
Tensile Strength: Yield (Proof), MPa 260 to 870
500

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1420
1350
Melting Onset (Solidus), °C 1370
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 4.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 5.9
8.0
Embodied Energy, MJ/kg 81
110
Embodied Water, L/kg 140
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 160
57
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 2010
570
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 17 to 30
23
Strength to Weight: Bending, points 17 to 25
21
Thermal Shock Resistance, points 16 to 29
21

Alloy Composition

Carbon (C), % 0 to 0.050
0.2 to 0.35
Chromium (Cr), % 0 to 0.3
26 to 29
Cobalt (Co), % 0 to 0.5
61.7 to 67.3
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 48.2 to 53
0 to 3.0
Manganese (Mn), % 0 to 0.8
0
Molybdenum (Mo), % 0 to 0.3
4.5 to 6.0
Nickel (Ni), % 47 to 49
2.0 to 3.0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.030
0