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AS41B Magnesium vs. C86700 Bronze

AS41B magnesium belongs to the magnesium alloys classification, while C86700 bronze belongs to the copper alloys. There are 28 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 C86700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 6.0
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 210
630
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 370
180
Maximum Temperature: Mechanical, °C 110
130
Melting Completion (Liquidus), °C 620
880
Melting Onset (Solidus), °C 570
860
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 68
89
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
17
Electrical Conductivity: Equal Weight (Specific), % IACS 92
19

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
2.9
Embodied Energy, MJ/kg 160
49
Embodied Water, L/kg 980
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
86
Resilience: Unit (Modulus of Resilience), kJ/m3 220
290
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 35
22
Strength to Weight: Bending, points 47
21
Thermal Diffusivity, mm2/s 41
28
Thermal Shock Resistance, points 13
21

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
1.0 to 3.0
Copper (Cu), % 0 to 0.020
55 to 60
Iron (Fe), % 0 to 0.0035
1.0 to 3.0
Lead (Pb), % 0
0.5 to 1.5
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
1.0 to 3.5
Nickel (Ni), % 0 to 0.0020
0 to 1.0
Silicon (Si), % 0.5 to 1.5
0
Tin (Sn), % 0
0 to 1.5
Zinc (Zn), % 0 to 0.12
30 to 38
Residuals, % 0
0 to 1.0