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AZ91A Magnesium vs. Grade M30H Nickel

AZ91A magnesium belongs to the magnesium alloys classification, while grade M30H nickel belongs to the nickel 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 AZ91A magnesium and the bottom bar is grade M30H nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
160
Elongation at Break, % 5.0
11
Fatigue Strength, MPa 99
230
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
61
Tensile Strength: Ultimate (UTS), MPa 240
770
Tensile Strength: Yield (Proof), MPa 160
470

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Maximum Temperature: Mechanical, °C 130
900
Melting Completion (Liquidus), °C 600
1250
Melting Onset (Solidus), °C 470
1200
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 73
22
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 52
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
50
Density, g/cm3 1.7
8.6
Embodied Carbon, kg CO2/kg material 22
7.7
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 990
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
75
Resilience: Unit (Modulus of Resilience), kJ/m3 280
700
Stiffness to Weight: Axial, points 15
10
Stiffness to Weight: Bending, points 69
21
Strength to Weight: Axial, points 38
25
Strength to Weight: Bending, points 49
22
Thermal Diffusivity, mm2/s 42
5.7
Thermal Shock Resistance, points 14
27

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.3
Copper (Cu), % 0 to 0.1
27 to 33
Iron (Fe), % 0
0 to 3.5
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.030
57.9 to 70.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
2.7 to 3.7
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0