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C47940 Brass vs. ZK51A Magnesium

C47940 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 C47940 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, % 14 to 34
4.7
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
18
Shear Strength, MPa 250 to 310
160
Tensile Strength: Ultimate (UTS), MPa 380 to 520
240
Tensile Strength: Yield (Proof), MPa 160 to 390
150

Thermal Properties

Latent Heat of Fusion, J/g 170
340
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 850
640
Melting Onset (Solidus), °C 800
550
Specific Heat Capacity, J/kg-K 380
970
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 20
26

Otherwise Unclassified Properties

Base Metal Price, % relative 25
13
Density, g/cm3 8.2
1.8
Embodied Carbon, kg CO2/kg material 2.8
24
Embodied Energy, MJ/kg 47
160
Embodied Water, L/kg 330
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 100
10
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 740
260
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 19
64
Strength to Weight: Axial, points 13 to 17
36
Strength to Weight: Bending, points 14 to 17
47
Thermal Diffusivity, mm2/s 36
61
Thermal Shock Resistance, points 13 to 17
15

Alloy Composition

Copper (Cu), % 63 to 66
0 to 0.1
Iron (Fe), % 0.1 to 1.0
0
Lead (Pb), % 1.0 to 2.0
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0.1 to 0.5
0 to 0.010
Tin (Sn), % 1.2 to 2.0
0
Zinc (Zn), % 28.1 to 34.6
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3