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ACI-ASTM CB7Cu-2 Steel vs. Zamak 7

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while Zamak 7 belongs to the zinc 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 ACI-ASTM CB7Cu-2 steel and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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