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R60901 Alloy vs. ZK40A Magnesium

R60901 alloy belongs to the otherwise unclassified metals classification, while ZK40A magnesium belongs to the magnesium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, 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 R60901 alloy and the bottom bar is ZK40A magnesium.

UNS R60901 Zirconium-Niobium AlloyZK40A (ZK40A-T5, M16400) Magnesium
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
45
Elongation at Break, % 17 to 22
4.2
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 37
17
Tensile Strength: Ultimate (UTS), MPa 500 to 580
280
Tensile Strength: Yield (Proof), MPa 350 to 390
260

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Specific Heat Capacity, J/kg-K 270
970
Thermal Conductivity, W/m-K 17
110
Thermal Expansion, µm/m-K 6.3
26

Otherwise Unclassified Properties

Density, g/cm3 6.6
1.8
Embodied Water, L/kg 270
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 100
12
Resilience: Unit (Modulus of Resilience), kJ/m3 640 to 760
740
Stiffness to Weight: Axial, points 8.3
14
Stiffness to Weight: Bending, points 23
65
Strength to Weight: Axial, points 21 to 25
43
Strength to Weight: Bending, points 21 to 24
53
Thermal Diffusivity, mm2/s 9.7
62
Thermal Shock Resistance, points 58 to 67
17

Alloy Composition

Magnesium (Mg), % 0
94.2 to 96.1
Niobium (Nb), % 2.4 to 2.8
0
Zinc (Zn), % 0
3.5 to 4.5
Zirconium (Zr), % 96.8 to 97.5
0.45 to 1.0
Residuals, % 0
0 to 0.3