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Permanent Mold Cast Zinc-Aluminum 27

Permanent mold ZA-27 is ZA-27 in the as-fabricated (no temper or treatment) condition. It has the lowest strength compared to the other variants of ZA-27. The graph bars on the material properties cards below compare permanent mold ZA-27 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

260 MPa 37 x 103 psi

Elastic (Young's, Tensile) Modulus

78 GPa 11 x 106 psi

Elongation at Break

3.6 %

Fatigue Strength

110 MPa 16 x 103 psi

Fracture Toughness

20 MPa-m1/2 18 x 103 psi-in1/2

Poisson's Ratio

0.27

Shear Modulus

31 GPa 4.4 x 106 psi

Shear Strength

230 MPa 33 x 103 psi

Tensile Strength: Ultimate (UTS)

400 MPa 58 x 103 psi

Tensile Strength: Yield (Proof)

260 MPa 37 x 103 psi

Thermal Properties

Latent Heat of Fusion

130 J/g

Maximum Temperature: Mechanical

120 °C 260 °F

Melting Completion (Liquidus)

480 °C 900 °F

Melting Onset (Solidus)

380 °C 710 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

530 J/kg-K 0.13 BTU/lb-°F

Thermal Conductivity

130 W/m-K 72 BTU/h-ft-°F

Thermal Expansion

26 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

30 % IACS

Electrical Conductivity: Equal Weight (Specific)

53 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

5.0 g/cm3 310 lb/ft3

Embodied Carbon

4.2 kg CO2/kg material

Embodied Energy

80 MJ/kg 34 x 103 BTU/lb

Embodied Water

570 L/kg 68 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

13 MJ/m3

Resilience: Unit (Modulus of Resilience)

420 kJ/m3

Stiffness to Weight: Axial

8.6 points

Stiffness to Weight: Bending

28 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

24 points

Thermal Diffusivity

47 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Zinc (Zn) 69.3 to 73
Aluminum (Al) 25 to 28
Copper (Cu) 2.0 to 2.5
Iron (Fe) 0 to 0.1
Silicon (Si) 0 to 0.080
Magnesium (Mg) 0.010 to 0.020
Nickel (Ni) 0 to 0.020
Lead (Pb) 0 to 0.0060
Cadmium (Cd) 0 to 0.0060
Tin (Sn) 0 to 0.0030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

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