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R05255 Alloy vs. ZK51A Magnesium

R05255 alloy belongs to the otherwise unclassified metals classification, while ZK51A magnesium belongs to the magnesium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, 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 R05255 alloy and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 20
4.7
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 70
18
Tensile Strength: Ultimate (UTS), MPa 540
240
Tensile Strength: Yield (Proof), MPa 450
150

Thermal Properties

Latent Heat of Fusion, J/g 140
340
Specific Heat Capacity, J/kg-K 140
970
Thermal Conductivity, W/m-K 59
110
Thermal Expansion, µm/m-K 6.6
26

Otherwise Unclassified Properties

Density, g/cm3 17
1.8
Embodied Water, L/kg 630
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
10
Resilience: Unit (Modulus of Resilience), kJ/m3 530
260
Stiffness to Weight: Axial, points 6.3
14
Stiffness to Weight: Bending, points 11
64
Strength to Weight: Axial, points 9.1
36
Strength to Weight: Bending, points 8.9
47
Thermal Diffusivity, mm2/s 25
61
Thermal Shock Resistance, points 31
15

Alloy Composition

Carbon (C), % 0 to 0.010
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0
Magnesium (Mg), % 0
93.1 to 95.9
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
0 to 0.010
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.015
0
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 95.9 to 98
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3