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AZ31C Magnesium vs. C66700 Brass

AZ31C magnesium belongs to the magnesium alloys classification, while C66700 brass belongs to the copper alloys. There are 29 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 AZ31C magnesium and the bottom bar is C66700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 12
2.0 to 58
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 17
41
Shear Strength, MPa 130
250 to 530
Tensile Strength: Ultimate (UTS), MPa 260
340 to 690
Tensile Strength: Yield (Proof), MPa 200
100 to 640

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 110
140
Melting Completion (Liquidus), °C 600
1090
Melting Onset (Solidus), °C 550
1050
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 130
97
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
17
Electrical Conductivity: Equal Weight (Specific), % IACS 98
19

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 970
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28
13 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 440
49 to 1900
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 42
11 to 23
Strength to Weight: Bending, points 53
13 to 21
Thermal Diffusivity, mm2/s 74
30
Thermal Shock Resistance, points 16
11 to 23

Alloy Composition


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Aluminum (Al), % 2.4 to 3.6
0
Copper (Cu), % 0 to 0.1
68.5 to 71.5
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 93.4 to 97
0
Manganese (Mn), % 0.15 to 1.0
0.8 to 1.5
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.1
0
Zinc (Zn), % 0.5 to 1.5
26.3 to 30.7
Residuals, % 0 to 0.3
0 to 0.5