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Nickel 725 vs. ZK51A Magnesium

Nickel 725 belongs to the nickel alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 725 and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 34
4.7
Fatigue Strength, MPa 260
62
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
18
Shear Strength, MPa 580
160
Tensile Strength: Ultimate (UTS), MPa 860
240
Tensile Strength: Yield (Proof), MPa 350
150

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 980
120
Melting Completion (Liquidus), °C 1340
640
Melting Onset (Solidus), °C 1270
550
Specific Heat Capacity, J/kg-K 440
970
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
28
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
140

Otherwise Unclassified Properties

Base Metal Price, % relative 75
13
Density, g/cm3 8.5
1.8
Embodied Carbon, kg CO2/kg material 13
24
Embodied Energy, MJ/kg 190
160
Embodied Water, L/kg 270
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
10
Resilience: Unit (Modulus of Resilience), kJ/m3 300
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
64
Strength to Weight: Axial, points 28
36
Strength to Weight: Bending, points 24
47
Thermal Shock Resistance, points 23
15

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19 to 22.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 2.3 to 15.3
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0 to 0.35
0
Molybdenum (Mo), % 7.0 to 9.5
0
Nickel (Ni), % 55 to 59
0 to 0.010
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 1.0 to 1.7
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3