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AZ91A Magnesium vs. C44400 Brass

AZ91A magnesium belongs to the magnesium alloys classification, while C44400 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 AZ91A magnesium and the bottom bar is C44400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 240
350
Tensile Strength: Yield (Proof), MPa 160
120

Thermal Properties

Latent Heat of Fusion, J/g 360
180
Maximum Temperature: Mechanical, °C 130
140
Melting Completion (Liquidus), °C 600
940
Melting Onset (Solidus), °C 470
900
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
110
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
25
Electrical Conductivity: Equal Weight (Specific), % IACS 52
27

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 280
65
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
12
Strength to Weight: Bending, points 49
13
Thermal Diffusivity, mm2/s 42
35
Thermal Shock Resistance, points 14
12

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Antimony (Sb), % 0
0.020 to 0.1
Copper (Cu), % 0 to 0.1
70 to 73
Iron (Fe), % 0
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0.9 to 1.2
Zinc (Zn), % 0.35 to 1.0
25.2 to 29.1
Residuals, % 0
0 to 0.4