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Nickel 684 vs. QE22A Magnesium

Nickel 684 belongs to the nickel alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 nickel 684 and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
80
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 11
2.4
Fatigue Strength, MPa 390
110
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 710
150
Tensile Strength: Ultimate (UTS), MPa 1190
250
Tensile Strength: Yield (Proof), MPa 800
190

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 1000
250
Melting Completion (Liquidus), °C 1370
640
Melting Onset (Solidus), °C 1320
570
Specific Heat Capacity, J/kg-K 470
970
Thermal Expansion, µm/m-K 13
27

Otherwise Unclassified Properties

Density, g/cm3 8.3
2.0
Embodied Carbon, kg CO2/kg material 10
27
Embodied Energy, MJ/kg 140
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 1610
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
60
Strength to Weight: Axial, points 40
36
Strength to Weight: Bending, points 30
46
Thermal Shock Resistance, points 34
15

Alloy Composition

Aluminum (Al), % 2.5 to 3.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 15 to 20
0
Cobalt (Co), % 13 to 20
0
Copper (Cu), % 0 to 0.15
0 to 0.1
Iron (Fe), % 0 to 4.0
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 0 to 0.75
0
Molybdenum (Mo), % 3.0 to 5.0
0
Nickel (Ni), % 42.7 to 64
0 to 0.010
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.75
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 2.5 to 3.3
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3