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C95700 Bronze vs. Z21721 Zinc

C95700 bronze belongs to the copper alloys classification, while Z21721 zinc belongs to the zinc alloys.

For each property being compared, the top bar is C95700 bronze and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
87
Elongation at Break, % 23
40
Poisson's Ratio 0.34
0.25
Shear Modulus, GPa 47
35
Tensile Strength: Ultimate (UTS), MPa 680
150
Tensile Strength: Yield (Proof), MPa 310
120

Thermal Properties

Latent Heat of Fusion, J/g 230
110
Maximum Temperature: Mechanical, °C 220
90
Melting Completion (Liquidus), °C 990
410
Melting Onset (Solidus), °C 950
390
Specific Heat Capacity, J/kg-K 440
390
Thermal Conductivity, W/m-K 12
110
Thermal Expansion, µm/m-K 18
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
27
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
37

Otherwise Unclassified Properties

Base Metal Price, % relative 26
11
Density, g/cm3 8.2
6.6
Embodied Carbon, kg CO2/kg material 3.3
2.8
Embodied Energy, MJ/kg 54
53
Embodied Water, L/kg 360
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
57
Resilience: Unit (Modulus of Resilience), kJ/m3 390
88
Stiffness to Weight: Axial, points 8.5
7.3
Stiffness to Weight: Bending, points 20
22
Strength to Weight: Axial, points 23
6.4
Strength to Weight: Bending, points 21
9.6
Thermal Diffusivity, mm2/s 3.3
44
Thermal Shock Resistance, points 21
4.8

Alloy Composition

Aluminum (Al), % 7.0 to 8.5
0 to 0.0020
Cadmium (Cd), % 0
0 to 0.070
Copper (Cu), % 71 to 78.5
0 to 0.0050
Iron (Fe), % 2.0 to 4.0
0 to 0.010
Lead (Pb), % 0 to 0.030
0 to 1.0
Manganese (Mn), % 11 to 14
0
Nickel (Ni), % 1.5 to 3.0
0
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0
0 to 0.020
Zinc (Zn), % 0
98.9 to 100
Residuals, % 0 to 0.5
0