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C90500 Gun Metal vs. Zamak 7

C90500 gun metal belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C90500 gun metal and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 280
410
Elastic (Young's, Tensile) Modulus, GPa 110
86
Elongation at Break, % 20
13
Fatigue Strength, MPa 90
47
Poisson's Ratio 0.34
0.25
Shear Modulus, GPa 40
33
Tensile Strength: Ultimate (UTS), MPa 320
280
Tensile Strength: Yield (Proof), MPa 160
250

Thermal Properties

Latent Heat of Fusion, J/g 190
120
Maximum Temperature: Mechanical, °C 170
95
Melting Completion (Liquidus), °C 1000
390
Melting Onset (Solidus), °C 850
380
Solidification (Pattern Maker's) Shrinkage, % 1.6
1.2
Specific Heat Capacity, J/kg-K 370
410
Thermal Conductivity, W/m-K 75
110
Thermal Expansion, µm/m-K 18
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
27
Electrical Conductivity: Equal Weight (Specific), % IACS 11
38

Otherwise Unclassified Properties

Base Metal Price, % relative 35
11
Density, g/cm3 8.7
6.4
Embodied Carbon, kg CO2/kg material 3.6
3.0
Embodied Energy, MJ/kg 59
57
Embodied Water, L/kg 390
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
36
Resilience: Unit (Modulus of Resilience), kJ/m3 110
370
Stiffness to Weight: Axial, points 6.9
7.5
Stiffness to Weight: Bending, points 18
23
Strength to Weight: Axial, points 10
12
Strength to Weight: Bending, points 12
15
Thermal Diffusivity, mm2/s 23
43
Thermal Shock Resistance, points 12
8.6

Alloy Composition

Aluminum (Al), % 0 to 0.0050
3.5 to 4.3
Antimony (Sb), % 0 to 0.2
0
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 86 to 89
0 to 0.25
Iron (Fe), % 0 to 0.2
0 to 0.075
Lead (Pb), % 0 to 0.3
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Nickel (Ni), % 0 to 1.0
0.0050 to 0.020
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
0 to 0.0010
Zinc (Zn), % 1.0 to 3.0
95.3 to 96.5
Residuals, % 0 to 0.3
0