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ASTM A369 Grade FP91 vs. AZ63A Magnesium

ASTM A369 grade FP91 belongs to the iron alloys classification, while AZ63A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
46
Elongation at Break, % 19
2.2 to 8.0
Fatigue Strength, MPa 320
76 to 83
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
18
Shear Strength, MPa 410
110 to 160
Tensile Strength: Ultimate (UTS), MPa 670
190 to 270
Tensile Strength: Yield (Proof), MPa 460
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 600
120
Melting Completion (Liquidus), °C 1460
610
Melting Onset (Solidus), °C 1420
450
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 26
52 to 65
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
12 to 15
Electrical Conductivity: Equal Weight (Specific), % IACS 10
59 to 74

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 2.6
22
Embodied Energy, MJ/kg 37
150
Embodied Water, L/kg 88
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 560
71 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
66
Strength to Weight: Axial, points 24
29 to 41
Strength to Weight: Bending, points 22
40 to 51
Thermal Diffusivity, mm2/s 6.9
29 to 37
Thermal Shock Resistance, points 18
11 to 16

Alloy Composition

Aluminum (Al), % 0 to 0.020
5.3 to 6.7
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 87.3 to 90.3
0
Magnesium (Mg), % 0
88.6 to 92.1
Manganese (Mn), % 0.3 to 0.6
0.15 to 0.35
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.010
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.2 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
2.5 to 3.5
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.3