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AS41B Magnesium vs. CC494K Bronze

AS41B magnesium belongs to the magnesium alloys classification, while CC494K bronze belongs to the copper alloys. There are 28 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 AS41B magnesium and the bottom bar is CC494K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 6.0
7.6
Poisson's Ratio 0.29
0.35
Shear Modulus, GPa 18
39
Tensile Strength: Ultimate (UTS), MPa 210
210
Tensile Strength: Yield (Proof), MPa 140
94

Thermal Properties

Latent Heat of Fusion, J/g 370
180
Maximum Temperature: Mechanical, °C 110
160
Melting Completion (Liquidus), °C 620
970
Melting Onset (Solidus), °C 570
890
Specific Heat Capacity, J/kg-K 1000
360
Thermal Conductivity, W/m-K 68
63
Thermal Expansion, µm/m-K 26
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
16
Electrical Conductivity: Equal Weight (Specific), % IACS 92
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
9.1
Embodied Carbon, kg CO2/kg material 23
3.1
Embodied Energy, MJ/kg 160
50
Embodied Water, L/kg 980
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
13
Resilience: Unit (Modulus of Resilience), kJ/m3 220
43
Stiffness to Weight: Axial, points 15
6.4
Stiffness to Weight: Bending, points 72
17
Strength to Weight: Axial, points 35
6.5
Strength to Weight: Bending, points 47
8.8
Thermal Diffusivity, mm2/s 41
19
Thermal Shock Resistance, points 13
7.8

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0 to 0.010
Antimony (Sb), % 0
0 to 0.5
Copper (Cu), % 0 to 0.020
78 to 87
Iron (Fe), % 0 to 0.0035
0 to 0.25
Lead (Pb), % 0
8.0 to 10
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0 to 0.2
Nickel (Ni), % 0 to 0.0020
0 to 2.0
Phosphorus (P), % 0
0 to 0.1
Silicon (Si), % 0.5 to 1.5
0 to 0.010
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0
4.0 to 6.0
Zinc (Zn), % 0 to 0.12
0 to 2.0