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C87500 Brass vs. ZK51A Magnesium

C87500 brass belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium 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 C87500 brass and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 18
4.7
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
18
Tensile Strength: Ultimate (UTS), MPa 460
240
Tensile Strength: Yield (Proof), MPa 190
150

Thermal Properties

Latent Heat of Fusion, J/g 260
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 920
640
Melting Onset (Solidus), °C 820
550
Specific Heat Capacity, J/kg-K 410
970
Thermal Conductivity, W/m-K 28
110
Thermal Expansion, µm/m-K 18
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
28
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
140

Otherwise Unclassified Properties

Base Metal Price, % relative 27
13
Density, g/cm3 8.3
1.8
Embodied Carbon, kg CO2/kg material 2.7
24
Embodied Energy, MJ/kg 44
160
Embodied Water, L/kg 300
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
10
Resilience: Unit (Modulus of Resilience), kJ/m3 160
260
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
64
Strength to Weight: Axial, points 16
36
Strength to Weight: Bending, points 16
47
Thermal Diffusivity, mm2/s 8.3
61
Thermal Shock Resistance, points 17
15

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Copper (Cu), % 79 to 85
0 to 0.1
Lead (Pb), % 0 to 0.5
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 3.0 to 5.0
0
Zinc (Zn), % 12 to 16
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3