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Z21721 Zinc vs. R05255 Alloy

Z21721 zinc belongs to the zinc alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (8, 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 Z21721 zinc and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
190
Elongation at Break, % 40
20
Poisson's Ratio 0.25
0.34
Shear Modulus, GPa 35
70
Tensile Strength: Ultimate (UTS), MPa 150
540
Tensile Strength: Yield (Proof), MPa 120
450

Thermal Properties

Latent Heat of Fusion, J/g 110
140
Specific Heat Capacity, J/kg-K 390
140
Thermal Conductivity, W/m-K 110
59
Thermal Expansion, µm/m-K 26
6.6

Otherwise Unclassified Properties

Density, g/cm3 6.6
17
Embodied Water, L/kg 340
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
100
Resilience: Unit (Modulus of Resilience), kJ/m3 88
530
Stiffness to Weight: Axial, points 7.3
6.3
Stiffness to Weight: Bending, points 22
11
Strength to Weight: Axial, points 6.4
9.1
Strength to Weight: Bending, points 9.6
8.9
Thermal Diffusivity, mm2/s 44
25
Thermal Shock Resistance, points 4.8
31

Alloy Composition

Aluminum (Al), % 0 to 0.0020
0
Cadmium (Cd), % 0 to 0.070
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 0 to 0.0050
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.010
0 to 0.010
Lead (Pb), % 0 to 1.0
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.0050
Tantalum (Ta), % 0
95.9 to 98
Titanium (Ti), % 0 to 0.020
0 to 0.010
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 98.9 to 100
0