Zamak 2 (ASTM AC43A, Z35541, Mazak 2) Zinc Alloy
Zamak 2 is a zinc-aluminum alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. AC43A is the ASTM designation for this material. Z35541 is the UNS number. And Zamak 2 is the common industry name.
It has a moderately high tensile strength among the zinc alloys in the database.
The graph bars on the material properties cards below compare Zamak 2 to: zinc-aluminums (top), all zinc alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
100
Compressive (Crushing) Strength
640 MPa 93 x 103 psi
Elastic (Young's, Tensile) Modulus
87 GPa 13 x 106 psi
Elongation at Break
6.0 %
Fatigue Strength
59 MPa 8.6 x 103 psi
Knoop Hardness
130
Poisson's Ratio
0.26
Rockwell B Hardness
63
Shear Modulus
33 GPa 4.8 x 106 psi
Shear Strength
320 MPa 46 x 103 psi
Tensile Strength: Ultimate (UTS)
360 MPa 52 x 103 psi
Tensile Strength: Yield (Proof)
270 MPa 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
130 J/g
Maximum Temperature: Mechanical
95 °C 200 °F
Melting Completion (Liquidus)
390 °C 730 °F
Melting Onset (Solidus)
380 °C 710 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
410 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
110 W/m-K 63 BTU/h-ft-°F
Thermal Expansion
28 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
25 % IACS
Electrical Conductivity: Equal Weight (Specific)
35 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
6.5 g/cm3 400 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
57 MJ/kg 24 x 103 BTU/lb
Embodied Water
380 L/kg 45 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
20 MJ/m3
Resilience: Unit (Modulus of Resilience)
420 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
15 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
41 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
| Zn | 92.2 to 94 | |
| Al | 3.5 to 4.3 | |
| Cu | 2.5 to 3.3 | |
| Fe | 0 to 0.1 | |
| Mg | 0.020 to 0.060 | |
| Si | 0 to 0.030 | |
| Ni | 0 to 0.020 | |
| Pb | 0 to 0.0050 | |
| Cd | 0 to 0.0050 | |
| Sn | 0 to 0.0030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 12844: Zinc and zinc alloys - Castings - Specifications
ASTM B86: Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings
Corrosion Resistance of Zinc and Zinc Alloys, Frank C. Porter, 1994
Zinc Handbook: Properties, Processing, and Use In Design, Frank C. Porter, 1991
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015