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Type 4 Magnetic Alloy vs. ASTM A369 Grade FP9

Type 4 magnetic alloy belongs to the nickel alloys classification, while ASTM A369 grade FP9 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 A369 grade FP9.

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
160
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 420 to 630
300
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
470
Tensile Strength: Yield (Proof), MPa 270 to 1040
240

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 900
600
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 440
480
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
2.0
Embodied Energy, MJ/kg 140
28
Embodied Water, L/kg 210
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
80
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
140
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19 to 35
17
Strength to Weight: Bending, points 18 to 27
17
Thermal Shock Resistance, points 21 to 37
13

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 90.3
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 0.030
Silicon (Si), % 0 to 0.5
0.5 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030