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AS41B Magnesium vs. ASTM A369 Grade FP9

AS41B magnesium belongs to the magnesium alloys classification, while ASTM A369 grade FP9 belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 AS41B magnesium and the bottom bar is ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 6.0
20
Fatigue Strength, MPa 97
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
75
Shear Strength, MPa 120
300
Tensile Strength: Ultimate (UTS), MPa 210
470
Tensile Strength: Yield (Proof), MPa 140
240

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 110
600
Melting Completion (Liquidus), °C 620
1450
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 68
26
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 92
10

Otherwise Unclassified Properties

Base Metal Price, % relative 12
6.5
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
2.0
Embodied Energy, MJ/kg 160
28
Embodied Water, L/kg 980
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
80
Resilience: Unit (Modulus of Resilience), kJ/m3 220
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 35
17
Strength to Weight: Bending, points 47
17
Thermal Diffusivity, mm2/s 41
6.9
Thermal Shock Resistance, points 13
13

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.0035
87.1 to 90.3
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0.5 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.12
0