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Type 3 Magnetic Alloy vs. ASTM A387 Grade 91 Class 2

Type 3 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 3 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 180
190
Elongation at Break, % 43
20
Fatigue Strength, MPa 170
330
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 70
75
Shear Strength, MPa 380
420
Tensile Strength: Ultimate (UTS), MPa 550
670
Tensile Strength: Yield (Proof), MPa 210
470

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 910
600
Melting Completion (Liquidus), °C 1370
1460
Melting Onset (Solidus), °C 1320
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
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 55
7.0
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 8.7
2.6
Embodied Energy, MJ/kg 120
37
Embodied Water, L/kg 220
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 120
580
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 17
22
Thermal Shock Resistance, points 18
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0 to 0.050
0.080 to 0.12
Chromium (Cr), % 2.0 to 3.0
8.0 to 9.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 4.0 to 6.0
0
Iron (Fe), % 9.9 to 19
87.3 to 90.3
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.85 to 1.1
Nickel (Ni), % 75 to 78
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