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C90500 Gun Metal vs. ZK51A Magnesium

C90500 gun metal belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 C90500 gun metal and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 20
4.7
Fatigue Strength, MPa 90
62
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 40
18
Tensile Strength: Ultimate (UTS), MPa 320
240
Tensile Strength: Yield (Proof), MPa 160
150

Thermal Properties

Latent Heat of Fusion, J/g 190
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 1000
640
Melting Onset (Solidus), °C 850
550
Solidification (Pattern Maker's) Shrinkage, % 1.6
1.3
Specific Heat Capacity, J/kg-K 370
970
Thermal Conductivity, W/m-K 75
110
Thermal Expansion, µm/m-K 18
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
28
Electrical Conductivity: Equal Weight (Specific), % IACS 11
140

Otherwise Unclassified Properties

Base Metal Price, % relative 35
13
Density, g/cm3 8.7
1.8
Embodied Carbon, kg CO2/kg material 3.6
24
Embodied Energy, MJ/kg 59
160
Embodied Water, L/kg 390
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
10
Resilience: Unit (Modulus of Resilience), kJ/m3 110
260
Stiffness to Weight: Axial, points 6.9
14
Stiffness to Weight: Bending, points 18
64
Strength to Weight: Axial, points 10
36
Strength to Weight: Bending, points 12
47
Thermal Diffusivity, mm2/s 23
61
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
0 to 0.1
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0 to 0.3
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0 to 1.0
0 to 0.010
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
0
Zinc (Zn), % 1.0 to 3.0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3