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AZ91B Magnesium vs. CC381H Copper-nickel

AZ91B magnesium belongs to the magnesium alloys classification, while CC381H copper-nickel belongs to the copper alloys. There are 29 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 AZ91B magnesium and the bottom bar is CC381H copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
91
Elastic (Young's, Tensile) Modulus, GPa 46
140
Elongation at Break, % 5.0
20
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
52
Tensile Strength: Ultimate (UTS), MPa 240
380
Tensile Strength: Yield (Proof), MPa 160
140

Thermal Properties

Latent Heat of Fusion, J/g 360
240
Maximum Temperature: Mechanical, °C 130
260
Melting Completion (Liquidus), °C 600
1180
Melting Onset (Solidus), °C 470
1120
Specific Heat Capacity, J/kg-K 990
410
Thermal Conductivity, W/m-K 73
30
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
6.8
Electrical Conductivity: Equal Weight (Specific), % IACS 58
6.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
40
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
5.0
Embodied Energy, MJ/kg 160
73
Embodied Water, L/kg 990
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
60
Resilience: Unit (Modulus of Resilience), kJ/m3 280
68
Stiffness to Weight: Axial, points 15
8.6
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
12
Strength to Weight: Bending, points 49
13
Thermal Diffusivity, mm2/s 42
8.4
Thermal Shock Resistance, points 14
13

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.010
Carbon (C), % 0
0 to 0.030
Copper (Cu), % 0 to 0.35
64.5 to 69.9
Iron (Fe), % 0
0.5 to 1.5
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.6 to 1.2
Nickel (Ni), % 0 to 0.030
29 to 31
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0.35 to 1.0
0 to 0.5