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ASTM A369 Grade FP91 vs. Type 3 Magnetic Alloy

ASTM A369 grade FP91 belongs to the iron alloys classification, while Type 3 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 3 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 19
43
Fatigue Strength, MPa 320
170
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 75
70
Shear Strength, MPa 410
380
Tensile Strength: Ultimate (UTS), MPa 670
550
Tensile Strength: Yield (Proof), MPa 460
210

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 600
910
Melting Completion (Liquidus), °C 1460
1370
Melting Onset (Solidus), °C 1420
1320
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 13
12

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
55
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 2.6
8.7
Embodied Energy, MJ/kg 37
120
Embodied Water, L/kg 88
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 560
120
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24
18
Strength to Weight: Bending, points 22
17
Thermal Shock Resistance, points 18
18

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
2.0 to 3.0
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
4.0 to 6.0
Iron (Fe), % 87.3 to 90.3
9.9 to 19
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.85 to 1.1
0 to 0.5
Nickel (Ni), % 0 to 0.4
75 to 78
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