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AZ91B Magnesium vs. C41300 Brass

AZ91B magnesium belongs to the magnesium alloys classification, while C41300 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 AZ91B magnesium and the bottom bar is C41300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
2.0 to 44
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
42
Shear Strength, MPa 140
230 to 370
Tensile Strength: Ultimate (UTS), MPa 240
300 to 630
Tensile Strength: Yield (Proof), MPa 160
120 to 570

Thermal Properties

Latent Heat of Fusion, J/g 360
200
Maximum Temperature: Mechanical, °C 130
180
Melting Completion (Liquidus), °C 600
1040
Melting Onset (Solidus), °C 470
1010
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
130
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
30
Electrical Conductivity: Equal Weight (Specific), % IACS 58
31

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
11 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
69 to 1440
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
9.6 to 20
Strength to Weight: Bending, points 49
11 to 19
Thermal Diffusivity, mm2/s 42
40
Thermal Shock Resistance, points 14
11 to 22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
89 to 93
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 87.9 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
0.7 to 1.3
Zinc (Zn), % 0.35 to 1.0
5.1 to 10.3
Residuals, % 0
0 to 0.5