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Grade 705C Zirconium vs. ZK60A Magnesium

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while ZK60A magnesium belongs to the magnesium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, 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 grade 705C zirconium and the bottom bar is ZK60A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
46
Elongation at Break, % 13
4.5 to 9.9
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
18
Tensile Strength: Ultimate (UTS), MPa 540
320 to 330
Tensile Strength: Yield (Proof), MPa 390
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Specific Heat Capacity, J/kg-K 270
960
Thermal Conductivity, W/m-K 18
120
Thermal Expansion, µm/m-K 5.7
26

Otherwise Unclassified Properties

Density, g/cm3 6.7
1.9
Embodied Water, L/kg 450
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 66
14 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 790
570 to 690
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
63
Strength to Weight: Axial, points 22
47 to 49
Strength to Weight: Bending, points 22
55 to 56
Thermal Diffusivity, mm2/s 9.9
66
Thermal Shock Resistance, points 69
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.1
0
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 0
92.5 to 94.8
Niobium (Nb), % 2.0 to 3.0
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0
Zinc (Zn), % 0
4.8 to 6.2
Zirconium (Zr), % 91.9 to 98
0.45 to 1.0
Residuals, % 0
0 to 0.3