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C99700 Brass vs. ZK51A Magnesium

C99700 brass belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 26 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 C99700 brass and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
45
Elongation at Break, % 25
4.7
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 46
18
Tensile Strength: Ultimate (UTS), MPa 380
240
Tensile Strength: Yield (Proof), MPa 170
150

Thermal Properties

Latent Heat of Fusion, J/g 200
340
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 900
640
Melting Onset (Solidus), °C 880
550
Specific Heat Capacity, J/kg-K 410
970
Thermal Expansion, µm/m-K 20
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
140

Otherwise Unclassified Properties

Base Metal Price, % relative 25
13
Density, g/cm3 8.1
1.8
Embodied Carbon, kg CO2/kg material 3.3
24
Embodied Energy, MJ/kg 53
160
Embodied Water, L/kg 320
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
10
Resilience: Unit (Modulus of Resilience), kJ/m3 120
260
Stiffness to Weight: Axial, points 8.3
14
Stiffness to Weight: Bending, points 20
64
Strength to Weight: Axial, points 13
36
Strength to Weight: Bending, points 14
47
Thermal Shock Resistance, points 11
15

Alloy Composition

Aluminum (Al), % 0.5 to 3.0
0
Copper (Cu), % 54 to 65.5
0 to 0.1
Iron (Fe), % 0 to 1.0
0
Lead (Pb), % 0 to 2.0
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 11 to 15
0
Nickel (Ni), % 4.0 to 6.0
0 to 0.010
Tin (Sn), % 0 to 1.0
0
Zinc (Zn), % 19 to 25
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3