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ASTM A369 Grade FP91 vs. Type 4 Magnetic Alloy

ASTM A369 grade FP91 belongs to the iron alloys classification, while Type 4 magnetic alloy belongs to the nickel 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 ASTM A369 grade FP91 and the bottom bar is Type 4 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
2.0 to 40
Fatigue Strength, MPa 320
220 to 400
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 75
73
Shear Strength, MPa 410
420 to 630
Tensile Strength: Ultimate (UTS), MPa 670
620 to 1100
Tensile Strength: Yield (Proof), MPa 460
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 600
900
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
440
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
60
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 2.6
10
Embodied Energy, MJ/kg 37
140
Embodied Water, L/kg 88
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 560
190 to 2840
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24
19 to 35
Strength to Weight: Bending, points 22
18 to 27
Thermal Shock Resistance, points 18
21 to 37

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.050
Chromium (Cr), % 8.0 to 9.5
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 87.3 to 90.3
9.5 to 17.5
Manganese (Mn), % 0.3 to 0.6
0 to 0.8
Molybdenum (Mo), % 0.85 to 1.1
3.5 to 6.0
Nickel (Ni), % 0 to 0.4
79 to 82
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.010
Silicon (Si), % 0.2 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.020
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0