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EN-MC21220 Magnesium vs. C84400 Valve Metal

EN-MC21220 magnesium belongs to the magnesium alloys classification, while C84400 valve metal belongs to the copper 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 EN-MC21220 magnesium and the bottom bar is C84400 valve metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 11
19
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 17
39
Tensile Strength: Ultimate (UTS), MPa 210
230
Tensile Strength: Yield (Proof), MPa 120
110

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 120
160
Melting Completion (Liquidus), °C 600
1000
Melting Onset (Solidus), °C 540
840
Specific Heat Capacity, J/kg-K 1000
370
Thermal Conductivity, W/m-K 65
72
Thermal Expansion, µm/m-K 27
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
16
Electrical Conductivity: Equal Weight (Specific), % IACS 87
17

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 990
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
36
Resilience: Unit (Modulus of Resilience), kJ/m3 160
58
Stiffness to Weight: Axial, points 15
6.6
Stiffness to Weight: Bending, points 71
18
Strength to Weight: Axial, points 34
7.2
Strength to Weight: Bending, points 46
9.4
Thermal Diffusivity, mm2/s 39
22
Thermal Shock Resistance, points 12
8.3

Alloy Composition


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Aluminum (Al), % 4.4 to 5.5
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
Copper (Cu), % 0 to 0.010
78 to 82
Iron (Fe), % 0 to 0.0050
0 to 0.4
Lead (Pb), % 0
6.0 to 8.0
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0
Nickel (Ni), % 0 to 0.0020
0 to 1.0
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0 to 0.1
0 to 0.0050
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
2.3 to 3.5
Zinc (Zn), % 0 to 0.3
7.0 to 10
Residuals, % 0 to 0.010
0 to 0.7