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Nickel 684 vs. ZK51A Magnesium

Nickel 684 belongs to the nickel alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 11
4.7
Fatigue Strength, MPa 390
62
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
18
Shear Strength, MPa 710
160
Tensile Strength: Ultimate (UTS), MPa 1190
240
Tensile Strength: Yield (Proof), MPa 800
150

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 1000
120
Melting Completion (Liquidus), °C 1370
640
Melting Onset (Solidus), °C 1320
550
Specific Heat Capacity, J/kg-K 470
970
Thermal Expansion, µm/m-K 13
26

Otherwise Unclassified Properties

Base Metal Price, % relative 75
13
Density, g/cm3 8.3
1.8
Embodied Carbon, kg CO2/kg material 10
24
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 360
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
10
Resilience: Unit (Modulus of Resilience), kJ/m3 1610
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
64
Strength to Weight: Axial, points 40
36
Strength to Weight: Bending, points 30
47
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 95.9
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
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 2.5 to 3.3
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3