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2218 Aluminum vs. Monel K-500

2218 aluminum belongs to the aluminum alloys classification, while Monel K-500 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 2218 aluminum and the bottom bar is Monel K-500.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
160
Elongation at Break, % 6.8 to 10
25 to 36
Fatigue Strength, MPa 110
260 to 560
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
61
Shear Strength, MPa 210 to 250
430 to 700
Tensile Strength: Ultimate (UTS), MPa 330 to 430
640 to 1100
Tensile Strength: Yield (Proof), MPa 260 to 310
310 to 880

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Maximum Temperature: Mechanical, °C 220
900
Melting Completion (Liquidus), °C 640
1350
Melting Onset (Solidus), °C 510
1320
Specific Heat Capacity, J/kg-K 870
440
Thermal Conductivity, W/m-K 140
18
Thermal Expansion, µm/m-K 22
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 11
50
Density, g/cm3 3.1
8.7
Embodied Carbon, kg CO2/kg material 8.2
8.1
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 1130
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
180 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
300 to 2420
Stiffness to Weight: Axial, points 13
10
Stiffness to Weight: Bending, points 45
21
Strength to Weight: Axial, points 30 to 39
21 to 35
Strength to Weight: Bending, points 34 to 41
19 to 27
Thermal Diffusivity, mm2/s 52
4.8
Thermal Shock Resistance, points 15 to 19
21 to 36

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
2.3 to 3.2
Carbon (C), % 0
0 to 0.18
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
27 to 33
Iron (Fe), % 0 to 1.0
0 to 2.0
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0 to 1.5
Nickel (Ni), % 1.7 to 2.3
63 to 70.4
Silicon (Si), % 0 to 0.9
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.35 to 0.85
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0