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ZK40A Magnesium vs. C87800 Brass

ZK40A magnesium belongs to the magnesium alloys classification, while C87800 brass belongs to the copper alloys. There are 28 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 ZK40A magnesium and the bottom bar is C87800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 4.2
25
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
42
Tensile Strength: Ultimate (UTS), MPa 280
590
Tensile Strength: Yield (Proof), MPa 260
350

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Maximum Temperature: Mechanical, °C 120
170
Melting Completion (Liquidus), °C 600
920
Melting Onset (Solidus), °C 540
820
Specific Heat Capacity, J/kg-K 970
410
Thermal Conductivity, W/m-K 110
28
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 130
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
27
Density, g/cm3 1.8
8.3
Embodied Carbon, kg CO2/kg material 24
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 950
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
130
Resilience: Unit (Modulus of Resilience), kJ/m3 740
540
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 65
19
Strength to Weight: Axial, points 43
20
Strength to Weight: Bending, points 53
19
Thermal Diffusivity, mm2/s 62
8.3
Thermal Shock Resistance, points 17
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Antimony (Sb), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 0
80 to 84.2
Iron (Fe), % 0
0 to 0.15
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 94.2 to 96.1
0 to 0.010
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
3.8 to 4.2
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
0 to 0.25
Zinc (Zn), % 3.5 to 4.5
12 to 16
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0
0 to 0.5