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C91700 Bronze vs. ZK40A Magnesium

C91700 bronze belongs to the copper alloys classification, while ZK40A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 C91700 bronze and the bottom bar is ZK40A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 13
4.2
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 41
17
Tensile Strength: Ultimate (UTS), MPa 330
280
Tensile Strength: Yield (Proof), MPa 170
260

Thermal Properties

Latent Heat of Fusion, J/g 190
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 1020
600
Melting Onset (Solidus), °C 850
540
Specific Heat Capacity, J/kg-K 370
970
Thermal Conductivity, W/m-K 71
110
Thermal Expansion, µm/m-K 18
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
27
Electrical Conductivity: Equal Weight (Specific), % IACS 10
130

Otherwise Unclassified Properties

Base Metal Price, % relative 36
13
Density, g/cm3 8.7
1.8
Embodied Carbon, kg CO2/kg material 3.9
24
Embodied Energy, MJ/kg 63
160
Embodied Water, L/kg 400
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
12
Resilience: Unit (Modulus of Resilience), kJ/m3 140
740
Stiffness to Weight: Axial, points 6.9
14
Stiffness to Weight: Bending, points 18
65
Strength to Weight: Axial, points 11
43
Strength to Weight: Bending, points 12
53
Thermal Diffusivity, mm2/s 22
62
Thermal Shock Resistance, points 12
17

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 84.2 to 87.5
0
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0 to 0.25
0
Magnesium (Mg), % 0
94.2 to 96.1
Nickel (Ni), % 1.2 to 2.0
0
Phosphorus (P), % 0 to 0.3
0
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 11.3 to 12.5
0
Zinc (Zn), % 0 to 0.25
3.5 to 4.5
Zirconium (Zr), % 0
0.45 to 1.0
Residuals, % 0
0 to 0.3