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ZK51A Magnesium vs. Nickel 686

ZK51A magnesium belongs to the magnesium alloys classification, while nickel 686 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
220
Elongation at Break, % 4.7
51
Fatigue Strength, MPa 62
410
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
77
Shear Strength, MPa 160
560
Tensile Strength: Ultimate (UTS), MPa 240
780
Tensile Strength: Yield (Proof), MPa 150
350

Thermal Properties

Latent Heat of Fusion, J/g 340
320
Maximum Temperature: Mechanical, °C 120
980
Melting Completion (Liquidus), °C 640
1380
Melting Onset (Solidus), °C 550
1340
Specific Heat Capacity, J/kg-K 970
420
Thermal Conductivity, W/m-K 110
9.8
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
70
Density, g/cm3 1.8
9.0
Embodied Carbon, kg CO2/kg material 24
12
Embodied Energy, MJ/kg 160
170
Embodied Water, L/kg 940
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10
320
Resilience: Unit (Modulus of Resilience), kJ/m3 260
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 64
22
Strength to Weight: Axial, points 36
24
Strength to Weight: Bending, points 47
21
Thermal Diffusivity, mm2/s 61
2.6
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
19 to 23
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
0 to 5.0
Magnesium (Mg), % 93.1 to 95.9
0
Manganese (Mn), % 0
0 to 0.75
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0 to 0.010
49.5 to 63
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.080
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4
Zinc (Zn), % 3.6 to 5.5
0
Zirconium (Zr), % 0.5 to 1.0
0
Residuals, % 0 to 0.3
0