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Grade 702C Zirconium vs. QE22A Magnesium

Grade 702C zirconium belongs to the otherwise unclassified metals classification, while QE22A magnesium belongs to the magnesium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, 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 702C zirconium and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
80
Elastic (Young's, Tensile) Modulus, GPa 97
44
Elongation at Break, % 13
2.4
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
17
Tensile Strength: Ultimate (UTS), MPa 430
250
Tensile Strength: Yield (Proof), MPa 310
190

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Specific Heat Capacity, J/kg-K 270
970
Thermal Conductivity, W/m-K 22
110
Thermal Expansion, µm/m-K 5.7
27

Otherwise Unclassified Properties

Density, g/cm3 6.7
2.0

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 510
400
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
60
Strength to Weight: Axial, points 18
36
Strength to Weight: Bending, points 19
46
Thermal Diffusivity, mm2/s 12
59
Thermal Shock Resistance, points 55
15

Alloy Composition

Carbon (C), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.1
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 0
93.1 to 95.8
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.010
0
Silver (Ag), % 0
2.0 to 3.0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 94.8 to 100
0.4 to 1.0
Residuals, % 0
0 to 0.3