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AZ91A Magnesium vs. Grade 705C Zirconium

AZ91A magnesium belongs to the magnesium alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (13, 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 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
200
Elastic (Young's, Tensile) Modulus, GPa 46
98
Elongation at Break, % 5.0
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
36
Tensile Strength: Ultimate (UTS), MPa 240
540
Tensile Strength: Yield (Proof), MPa 160
390

Thermal Properties

Latent Heat of Fusion, J/g 360
250
Specific Heat Capacity, J/kg-K 990
270
Thermal Conductivity, W/m-K 73
18
Thermal Expansion, µm/m-K 26
5.7

Otherwise Unclassified Properties

Density, g/cm3 1.7
6.7
Embodied Water, L/kg 990
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
66
Resilience: Unit (Modulus of Resilience), kJ/m3 280
790
Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 49
22
Thermal Diffusivity, mm2/s 42
9.9
Thermal Shock Resistance, points 14
69

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.1
Copper (Cu), % 0 to 0.1
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0
0 to 0.3
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
91.9 to 98