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C68300 Brass vs. ZK51A Magnesium

C68300 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 (5, 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 C68300 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, % 15
4.7
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
18
Shear Strength, MPa 260
160
Tensile Strength: Ultimate (UTS), MPa 430
240
Tensile Strength: Yield (Proof), MPa 260
150

Thermal Properties

Latent Heat of Fusion, J/g 180
340
Maximum Temperature: Mechanical, °C 120
120
Melting Completion (Liquidus), °C 900
640
Melting Onset (Solidus), °C 890
550
Specific Heat Capacity, J/kg-K 390
970
Thermal Conductivity, W/m-K 120
110
Thermal Expansion, µm/m-K 20
26

Otherwise Unclassified Properties

Base Metal Price, % relative 23
13
Density, g/cm3 8.0
1.8
Embodied Carbon, kg CO2/kg material 2.8
24
Embodied Energy, MJ/kg 46
160
Embodied Water, L/kg 340
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
10
Resilience: Unit (Modulus of Resilience), kJ/m3 330
260
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 20
64
Strength to Weight: Axial, points 15
36
Strength to Weight: Bending, points 16
47
Thermal Diffusivity, mm2/s 38
61
Thermal Shock Resistance, points 14
15

Alloy Composition

Antimony (Sb), % 0.3 to 1.0
0
Cadmium (Cd), % 0 to 0.010
0
Copper (Cu), % 59 to 63
0 to 0.1
Lead (Pb), % 0 to 0.090
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.3 to 1.0
0
Tin (Sn), % 0.050 to 0.2
0
Zinc (Zn), % 34.2 to 40.4
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3