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C85400 Brass vs. ZK51A Magnesium

C85400 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 (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 C85400 brass and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
45
Elongation at Break, % 23
4.7
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
18
Tensile Strength: Ultimate (UTS), MPa 220
240
Tensile Strength: Yield (Proof), MPa 85
150

Thermal Properties

Latent Heat of Fusion, J/g 180
340
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 940
640
Melting Onset (Solidus), °C 940
550
Specific Heat Capacity, J/kg-K 380
970
Thermal Conductivity, W/m-K 89
110
Thermal Expansion, µm/m-K 20
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
28
Electrical Conductivity: Equal Weight (Specific), % IACS 22
140

Otherwise Unclassified Properties

Base Metal Price, % relative 25
13
Density, g/cm3 8.3
1.8
Embodied Carbon, kg CO2/kg material 2.8
24
Embodied Energy, MJ/kg 46
160
Embodied Water, L/kg 330
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
10
Resilience: Unit (Modulus of Resilience), kJ/m3 35
260
Stiffness to Weight: Axial, points 7.0
14
Stiffness to Weight: Bending, points 19
64
Strength to Weight: Axial, points 7.5
36
Strength to Weight: Bending, points 9.9
47
Thermal Diffusivity, mm2/s 28
61
Thermal Shock Resistance, points 7.6
15

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Copper (Cu), % 65 to 70
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Lead (Pb), % 1.5 to 3.8
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0 to 1.0
0 to 0.010
Silicon (Si), % 0 to 0.050
0
Tin (Sn), % 0.5 to 1.5
0
Zinc (Zn), % 24 to 32
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3