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Zamak 7 vs. ZA-8

Both Zamak 7 and ZA-8 are zinc alloys. They have a moderately high 95% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
87 to 100
Compressive (Crushing) Strength, MPa 410
210 to 250
Elastic (Young's, Tensile) Modulus, GPa 86
85 to 86
Elongation at Break, % 13
1.3 to 8.0
Fatigue Strength, MPa 47
51 to 100
Knoop Hardness 99
110 to 130
Poisson's Ratio 0.25
0.26
Shear Modulus, GPa 33
34
Shear Strength, MPa 210
240 to 280
Tensile Strength: Ultimate (UTS), MPa 280
210 to 370
Tensile Strength: Yield (Proof), MPa 250
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 120
110
Maximum Temperature: Mechanical, °C 95
100
Melting Completion (Liquidus), °C 390
400
Melting Onset (Solidus), °C 380
380
Solidification (Pattern Maker's) Shrinkage, % 1.2
1.1
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 110
120
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
28
Electrical Conductivity: Equal Weight (Specific), % IACS 38
40

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 6.4
6.3
Embodied Carbon, kg CO2/kg material 3.0
3.3
Embodied Energy, MJ/kg 57
62
Embodied Water, L/kg 380
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 370
260 to 490
Stiffness to Weight: Axial, points 7.5
7.5
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 12
9.3 to 17
Strength to Weight: Bending, points 15
12 to 18
Thermal Diffusivity, mm2/s 43
42
Thermal Shock Resistance, points 8.6
7.6 to 13

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
8.0 to 8.8
Cadmium (Cd), % 0 to 0.0020
0 to 0.0060
Copper (Cu), % 0 to 0.25
0.8 to 1.3
Iron (Fe), % 0 to 0.075
0 to 0.075
Lead (Pb), % 0 to 0.0030
0 to 0.0060
Magnesium (Mg), % 0.0050 to 0.020
0.015 to 0.030
Nickel (Ni), % 0.0050 to 0.020
0 to 0.020
Silicon (Si), % 0
0 to 0.045
Tin (Sn), % 0 to 0.0010
0 to 0.0030
Zinc (Zn), % 95.3 to 96.5
89.7 to 91.2