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C69700 Brass vs. ZK51A Magnesium

C69700 brass belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 27 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 C69700 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, % 25
4.7
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
18
Shear Strength, MPa 300
160
Tensile Strength: Ultimate (UTS), MPa 470
240
Tensile Strength: Yield (Proof), MPa 230
150

Thermal Properties

Latent Heat of Fusion, J/g 240
340
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 930
640
Melting Onset (Solidus), °C 880
550
Specific Heat Capacity, J/kg-K 400
970
Thermal Conductivity, W/m-K 43
110
Thermal Expansion, µm/m-K 19
26

Otherwise Unclassified Properties

Base Metal Price, % relative 26
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 310
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
10
Resilience: Unit (Modulus of Resilience), kJ/m3 250
260
Stiffness to Weight: Axial, points 7.3
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 13
61
Thermal Shock Resistance, points 16
15

Alloy Composition

Copper (Cu), % 75 to 80
0 to 0.1
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0.5 to 1.5
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0 to 0.4
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 2.5 to 3.5
0
Zinc (Zn), % 13.9 to 22
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3