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Zamak 3 vs. ZA-12

Both Zamak 3 and ZA-12 are zinc alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is Zamak 3 and the bottom bar is ZA-12.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 83
89 to 100
Compressive (Crushing) Strength, MPa 410
230 to 270
Elastic (Young's, Tensile) Modulus, GPa 86
83
Elongation at Break, % 11
1.6 to 5.3
Fatigue Strength, MPa 48
73 to 120
Fracture Toughness, MPa-m1/2 12
14 to 15
Knoop Hardness 110
110 to 130
Poisson's Ratio 0.25
0.26
Rockwell B Hardness 50
56 to 63
Shear Modulus, GPa 33
33
Shear Strength, MPa 210
240 to 300
Tensile Strength: Ultimate (UTS), MPa 280
260 to 400
Tensile Strength: Yield (Proof), MPa 210
210 to 320

Thermal Properties

Latent Heat of Fusion, J/g 120
120
Maximum Temperature: Mechanical, °C 95
100
Melting Completion (Liquidus), °C 390
430
Melting Onset (Solidus), °C 380
380
Solidification (Pattern Maker's) Shrinkage, % 1.2
1.3
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 110
120
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
28
Electrical Conductivity: Equal Weight (Specific), % IACS 38
42

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 6.4
6.0
Embodied Carbon, kg CO2/kg material 3.0
3.4
Embodied Energy, MJ/kg 57
64
Embodied Water, L/kg 380
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28
4.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 260
260 to 620
Stiffness to Weight: Axial, points 7.5
7.6
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 12
12 to 19
Strength to Weight: Bending, points 15
15 to 20
Thermal Diffusivity, mm2/s 43
43
Thermal Shock Resistance, points 8.6
9.4 to 14

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
10.5 to 11.5
Cadmium (Cd), % 0 to 0.0050
0 to 0.0060
Copper (Cu), % 0 to 0.25
0.5 to 1.2
Iron (Fe), % 0 to 0.1
0 to 0.075
Lead (Pb), % 0 to 0.0050
0 to 0.0060
Magnesium (Mg), % 0.020 to 0.060
0.015 to 0.030
Nickel (Ni), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 0.030
0 to 0.060
Tin (Sn), % 0 to 0.0030
0 to 0.0030
Zinc (Zn), % 95.3 to 96.5
87.1 to 89