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Type 4 Magnetic Alloy vs. Type 3 Magnetic Alloy

Both Type 4 magnetic alloy and Type 3 magnetic alloy are nickel alloys. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is Type 4 magnetic alloy and the bottom bar is Type 3 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 2.0 to 40
43
Fatigue Strength, MPa 220 to 400
170
Poisson's Ratio 0.31
0.31
Shear Modulus, GPa 73
70
Shear Strength, MPa 420 to 630
380
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
550
Tensile Strength: Yield (Proof), MPa 270 to 1040
210

Thermal Properties

Curie Temperature, °C 460
400
Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Mechanical, °C 900
910
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1370
1320
Specific Heat Capacity, J/kg-K 440
450
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 60
55
Density, g/cm3 8.8
8.7
Embodied Carbon, kg CO2/kg material 10
8.7
Embodied Energy, MJ/kg 140
120
Embodied Water, L/kg 210
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
190
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
120
Stiffness to Weight: Axial, points 12
12
Stiffness to Weight: Bending, points 22
22
Strength to Weight: Axial, points 19 to 35
18
Strength to Weight: Bending, points 18 to 27
17
Thermal Shock Resistance, points 21 to 37
18

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.050
Chromium (Cr), % 0 to 0.3
2.0 to 3.0
Cobalt (Co), % 0 to 0.5
0 to 0.5
Copper (Cu), % 0 to 0.3
4.0 to 6.0
Iron (Fe), % 9.5 to 17.5
9.9 to 19
Manganese (Mn), % 0 to 0.8
0 to 1.5
Molybdenum (Mo), % 3.5 to 6.0
0 to 0.5
Nickel (Ni), % 79 to 82
75 to 78
Phosphorus (P), % 0 to 0.010
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.020