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ZK40A Magnesium vs. C42500 Brass

ZK40A magnesium belongs to the magnesium alloys classification, while C42500 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 ZK40A magnesium and the bottom bar is C42500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 4.2
2.0 to 49
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
42
Shear Strength, MPa 160
220 to 360
Tensile Strength: Ultimate (UTS), MPa 280
310 to 630
Tensile Strength: Yield (Proof), MPa 260
120 to 590

Thermal Properties

Latent Heat of Fusion, J/g 340
200
Maximum Temperature: Mechanical, °C 120
180
Melting Completion (Liquidus), °C 600
1030
Melting Onset (Solidus), °C 540
1010
Specific Heat Capacity, J/kg-K 970
380
Thermal Conductivity, W/m-K 110
120
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
28
Electrical Conductivity: Equal Weight (Specific), % IACS 130
29

Otherwise Unclassified Properties

Base Metal Price, % relative 13
30
Density, g/cm3 1.8
8.7
Embodied Carbon, kg CO2/kg material 24
2.8
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 950
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
12 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 740
64 to 1570
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 65
18
Strength to Weight: Axial, points 43
9.9 to 20
Strength to Weight: Bending, points 53
12 to 19
Thermal Diffusivity, mm2/s 62
36
Thermal Shock Resistance, points 17
11 to 22

Alloy Composition


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Copper (Cu), % 0
87 to 90
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 94.2 to 96.1
0
Phosphorus (P), % 0
0 to 0.35
Tin (Sn), % 0
1.5 to 3.0
Zinc (Zn), % 3.5 to 4.5
6.1 to 11.5
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.5