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Nickel 725 vs. ZK61A Magnesium

Nickel 725 belongs to the nickel alloys classification, while ZK61A 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 ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 34
5.8 to 7.1
Fatigue Strength, MPa 260
120 to 140
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
18
Shear Strength, MPa 580
170 to 180
Tensile Strength: Ultimate (UTS), MPa 860
290 to 310
Tensile Strength: Yield (Proof), MPa 350
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Maximum Temperature: Mechanical, °C 980
120
Melting Completion (Liquidus), °C 1340
640
Melting Onset (Solidus), °C 1270
530
Specific Heat Capacity, J/kg-K 440
960
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
29
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
130

Otherwise Unclassified Properties

Base Metal Price, % relative 75
13
Density, g/cm3 8.5
1.9
Embodied Carbon, kg CO2/kg material 13
23
Embodied Energy, MJ/kg 190
160
Embodied Water, L/kg 270
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 300
370 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
62
Strength to Weight: Axial, points 28
42 to 45
Strength to Weight: Bending, points 24
50 to 53
Thermal Shock Resistance, points 23
17 to 18

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
92.1 to 93.9
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
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3