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Zamak 7 vs. ACI-ASTM CB7Cu-2 Steel

Zamak 7 belongs to the zinc alloys classification, while ACI-ASTM CB7Cu-2 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is ACI-ASTM CB7Cu-2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
300 to 420
Elastic (Young's, Tensile) Modulus, GPa 86
190
Elongation at Break, % 13
5.7 to 11
Fatigue Strength, MPa 47
420 to 590
Poisson's Ratio 0.25
0.28
Shear Modulus, GPa 33
75
Tensile Strength: Ultimate (UTS), MPa 280
960 to 1350
Tensile Strength: Yield (Proof), MPa 250
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 120
280
Melting Completion (Liquidus), °C 390
1430
Melting Onset (Solidus), °C 380
1380
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 110
17
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 38
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
13
Density, g/cm3 6.4
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.6
Embodied Energy, MJ/kg 57
38
Embodied Water, L/kg 380
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
1510 to 3600
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 12
34 to 48
Strength to Weight: Bending, points 15
28 to 35
Thermal Diffusivity, mm2/s 43
4.6
Thermal Shock Resistance, points 8.6
32 to 45

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
14 to 15.5
Copper (Cu), % 0 to 0.25
2.5 to 3.2
Iron (Fe), % 0 to 0.075
73.6 to 79
Lead (Pb), % 0 to 0.0030
0
Magnesium (Mg), % 0.0050 to 0.020
0
Manganese (Mn), % 0
0 to 0.7
Nickel (Ni), % 0.0050 to 0.020
4.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.0010
0
Zinc (Zn), % 95.3 to 96.5
0