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ZK51A Magnesium vs. Nickel 684

ZK51A magnesium belongs to the magnesium alloys classification, while nickel 684 belongs to the nickel 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 ZK51A magnesium and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10
120
Resilience: Unit (Modulus of Resilience), kJ/m3 260
1610
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 64
23
Strength to Weight: Axial, points 36
40
Strength to Weight: Bending, points 47
30
Thermal Shock Resistance, points 15
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
15 to 20
Cobalt (Co), % 0
13 to 20
Copper (Cu), % 0 to 0.1
0 to 0.15
Iron (Fe), % 0
0 to 4.0
Magnesium (Mg), % 93.1 to 95.9
0
Manganese (Mn), % 0
0 to 0.75
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0 to 0.010
42.7 to 64
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
2.5 to 3.3
Zinc (Zn), % 3.6 to 5.5
0
Zirconium (Zr), % 0.5 to 1.0
0
Residuals, % 0 to 0.3
0