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AS41B Magnesium vs. ASTM F15 Fe-Ni-Co

AS41B magnesium belongs to the magnesium alloys classification, while ASTM F15 Fe-Ni-Co belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 F15 Fe-Ni-Co.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
73
Tensile Strength: Ultimate (UTS), MPa 210
520 to 880

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Melting Completion (Liquidus), °C 620
1410
Melting Onset (Solidus), °C 570
1450
Specific Heat Capacity, J/kg-K 1000
460
Thermal Conductivity, W/m-K 68
17
Thermal Expansion, µm/m-K 26
6.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 92
4.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
49
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 23
5.2
Embodied Energy, MJ/kg 160
71
Embodied Water, L/kg 980
190

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
23
Strength to Weight: Axial, points 35
17 to 29
Strength to Weight: Bending, points 47
17 to 24
Thermal Diffusivity, mm2/s 41
4.5
Thermal Shock Resistance, points 13
32 to 55

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0 to 0.1
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
0 to 0.2
Cobalt (Co), % 0
16 to 18
Copper (Cu), % 0 to 0.020
0 to 0.2
Iron (Fe), % 0 to 0.0035
50.3 to 56
Magnesium (Mg), % 92.7 to 95.7
0 to 0.1
Manganese (Mn), % 0.35 to 0.7
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0 to 0.0020
28 to 30
Silicon (Si), % 0.5 to 1.5
0 to 0.2
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.12
0
Zirconium (Zr), % 0
0 to 0.1