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ZA-27 vs. Zamak 3

Both ZA-27 and Zamak 3 are zinc alloys. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is ZA-27 and the bottom bar is Zamak 3.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 120
83
Compressive (Crushing) Strength, MPa 260 to 370
410
Elastic (Young's, Tensile) Modulus, GPa 78
86
Elongation at Break, % 2.0 to 4.5
11
Fatigue Strength, MPa 110 to 170
48
Fracture Toughness, MPa-m1/2 20 to 24
12
Knoop Hardness 120 to 140
110
Poisson's Ratio 0.27
0.25
Rockwell B Hardness 60 to 72
50
Shear Modulus, GPa 31
33
Shear Strength, MPa 230 to 330
210
Tensile Strength: Ultimate (UTS), MPa 400 to 430
280
Tensile Strength: Yield (Proof), MPa 260 to 370
210

Thermal Properties

Latent Heat of Fusion, J/g 130
120
Maximum Temperature: Mechanical, °C 120
95
Melting Completion (Liquidus), °C 480
390
Melting Onset (Solidus), °C 380
380
Solidification (Pattern Maker's) Shrinkage, % 1.3
1.2
Specific Heat Capacity, J/kg-K 530
410
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 26
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
27
Electrical Conductivity: Equal Weight (Specific), % IACS 53
38

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 5.0
6.4
Embodied Carbon, kg CO2/kg material 4.2
3.0
Embodied Energy, MJ/kg 80
57
Embodied Water, L/kg 570
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1 to 18
28
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 890
260
Stiffness to Weight: Axial, points 8.6
7.5
Stiffness to Weight: Bending, points 28
23
Strength to Weight: Axial, points 22 to 24
12
Strength to Weight: Bending, points 24 to 25
15
Thermal Diffusivity, mm2/s 47
43
Thermal Shock Resistance, points 14 to 15
8.6

Alloy Composition

Aluminum (Al), % 25 to 28
3.5 to 4.3
Cadmium (Cd), % 0 to 0.0060
0 to 0.0050
Copper (Cu), % 2.0 to 2.5
0 to 0.25
Iron (Fe), % 0 to 0.1
0 to 0.1
Lead (Pb), % 0 to 0.0060
0 to 0.0050
Magnesium (Mg), % 0.010 to 0.020
0.020 to 0.060
Nickel (Ni), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 0.080
0 to 0.030
Tin (Sn), % 0 to 0.0030
0 to 0.0030
Zinc (Zn), % 69.3 to 73
95.3 to 96.5