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AZ91B Magnesium vs. C49300 Brass

AZ91B magnesium belongs to the magnesium alloys classification, while C49300 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 C49300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 5.0
4.5 to 20
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Shear Strength, MPa 140
270 to 290
Tensile Strength: Ultimate (UTS), MPa 240
430 to 520
Tensile Strength: Yield (Proof), MPa 160
210 to 410

Thermal Properties

Latent Heat of Fusion, J/g 360
170
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 600
880
Melting Onset (Solidus), °C 470
840
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
88
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
15
Electrical Conductivity: Equal Weight (Specific), % IACS 58
17

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
3.0
Embodied Energy, MJ/kg 160
50
Embodied Water, L/kg 990
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
21 to 71
Resilience: Unit (Modulus of Resilience), kJ/m3 280
220 to 800
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
15 to 18
Strength to Weight: Bending, points 49
16 to 18
Thermal Diffusivity, mm2/s 42
29
Thermal Shock Resistance, points 14
14 to 18

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.5
Antimony (Sb), % 0
0 to 0.5
Bismuth (Bi), % 0
0.5 to 2.0
Copper (Cu), % 0 to 0.35
58 to 62
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.010
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.030
Nickel (Ni), % 0 to 0.030
0 to 1.5
Phosphorus (P), % 0
0 to 0.2
Selenium (Se), % 0
0 to 0.2
Silicon (Si), % 0 to 0.5
0 to 0.1
Tin (Sn), % 0
1.0 to 1.8
Zinc (Zn), % 0.35 to 1.0
30.6 to 40.5
Residuals, % 0
0 to 0.5