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C66700 Brass vs. ZK61A Magnesium

C66700 brass belongs to the copper alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 29 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 C66700 brass and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 2.0 to 58
5.8 to 7.1
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 41
18
Shear Strength, MPa 250 to 530
170 to 180
Tensile Strength: Ultimate (UTS), MPa 340 to 690
290 to 310
Tensile Strength: Yield (Proof), MPa 100 to 640
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 180
330
Maximum Temperature: Mechanical, °C 140
120
Melting Completion (Liquidus), °C 1090
640
Melting Onset (Solidus), °C 1050
530
Specific Heat Capacity, J/kg-K 390
960
Thermal Conductivity, W/m-K 97
120
Thermal Expansion, µm/m-K 20
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
29
Electrical Conductivity: Equal Weight (Specific), % IACS 19
130

Otherwise Unclassified Properties

Base Metal Price, % relative 25
13
Density, g/cm3 8.2
1.9
Embodied Carbon, kg CO2/kg material 2.7
23
Embodied Energy, MJ/kg 45
160
Embodied Water, L/kg 320
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 150
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 49 to 1900
370 to 420
Stiffness to Weight: Axial, points 7.3
13
Stiffness to Weight: Bending, points 19
62
Strength to Weight: Axial, points 11 to 23
42 to 45
Strength to Weight: Bending, points 13 to 21
50 to 53
Thermal Diffusivity, mm2/s 30
65
Thermal Shock Resistance, points 11 to 23
17 to 18

Alloy Composition

Copper (Cu), % 68.5 to 71.5
0 to 0.1
Iron (Fe), % 0 to 0.1
0
Lead (Pb), % 0 to 0.070
0
Magnesium (Mg), % 0
92.1 to 93.9
Manganese (Mn), % 0.8 to 1.5
0
Nickel (Ni), % 0
0 to 0.010
Zinc (Zn), % 26.3 to 30.7
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3