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AWS ERNiCu-7 vs. QE22A Magnesium

AWS ERNiCu-7 belongs to the nickel alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, 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 AWS ERNiCu-7 and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
44
Elongation at Break, % 34
2.4
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 61
17
Tensile Strength: Ultimate (UTS), MPa 550
250

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Melting Completion (Liquidus), °C 1280
640
Melting Onset (Solidus), °C 1240
570
Specific Heat Capacity, J/kg-K 440
970
Thermal Conductivity, W/m-K 20
110
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
120

Otherwise Unclassified Properties

Density, g/cm3 8.7
2.0
Embodied Carbon, kg CO2/kg material 8.5
27
Embodied Energy, MJ/kg 120
220

Common Calculations

Stiffness to Weight: Axial, points 10
13
Stiffness to Weight: Bending, points 21
60
Strength to Weight: Axial, points 18
36
Strength to Weight: Bending, points 17
46
Thermal Diffusivity, mm2/s 5.3
59
Thermal Shock Resistance, points 19
15

Alloy Composition


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Aluminum (Al), % 0 to 1.3
0
Carbon (C), % 0 to 0.15
0
Copper (Cu), % 18.3 to 36.5
0 to 0.1
Iron (Fe), % 0 to 2.5
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 0 to 4.0
0
Nickel (Ni), % 62 to 69
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.3
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 1.5 to 3.0
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0 to 0.5
0 to 0.3