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ZINC DIE CASTING
- Die casting machines up to 450 tons
- Hydraulic trim presses up to 40 tons
- Alloys #3, #5, #7, ZA8, ZA12 & ZA27
- Complete, unit and insert tooling
- Hot chamber process and tooling |
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ZINC ALLOY SELECTION GUIDE
Zinc #3
Usually the first choice when considering zinc for die casting. It provides an excellent combination of strength, ductility, impact strength and long-term dimensional stability. It also offers excellent plating and finishing characteristics.
Zinc #5
This alloy provides moderately greater hardness, strength and creep resistance
over Zinc #3.
Zinc #7
This is a modification of #3 alloy with similar mechanical properties. It has higher ductility for forming bending operations and higher casting fluidity which is important for casting thin walled components requiring good surface finish.
ZA-8
This alloy provides improved performance characteristics over the zinc alloys. It can be hot chamber die cast with improved strength, hardness and creep properties.
ZA-12
Provides excellent bearing properties with strength and hardness characteristics between ZA-8 and ZA-27. It has good dimensional stability and better die castability than ZA-27. Must be cast by the cold chamber die casting process.
ZA-27
Offers the highest mechanical properties of the ZA family. It has poor die filling characteristics. Difficult to chrome plate. (cold chamber process)
ZINC & ZA DIE CASTING ALLOY PROPERTIES
Chemical Properties - Percentage
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Alloy
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Al
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Mg
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Cu
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Fe
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Pb
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Cd
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Sn
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Ni
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Zinc #3
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3.5 - 4.3
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0.02 - 0.05
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0.25 max
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0.10
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0.005
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0.004
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0.003
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-
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Zinc #5
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3.5 - 4.3
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0.03 - 0.08
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0.75 - 1.25
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0.10
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0.005
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0.004
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0.003
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-
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Zinc #7
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3.5 - 4.3
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0.005 - 0.020
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0.25 max
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0.075
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0.003
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0.002
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0.001
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0.005-0.020
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ZA-8
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8.0 - 8.8
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0.015 - 0.030
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0.8 -1.3
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0.075
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0.006
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0.006
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0.003
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-
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ZA-12
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10.5 - 11.5
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0.015 - 0.030
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0.5 - 1.2
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0.075
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0.006
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0.006
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0.003
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-
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ZA-27
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25.0 - 28.0
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0.010 - 0.020
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2 - 2.5
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0.075
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0.006
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0.006
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0.003
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Mechanical Properties
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Alloy
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Tensile Strength (ksi)
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Yield Strength (ksi)
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Elongation (% in 2 in.)
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Brinell Hardness (BHN)
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Shear Strength (ksi)
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Fatigue Strength (ksi)
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Zinc #3
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41
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32
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10
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82
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31
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6.9
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Zinc #5
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48
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39
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7
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91
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38
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8.2
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Zinc #7
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41
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32
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13
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80
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31
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6.9
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ZA-8
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54
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41 - 43
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8 - 10
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100 - 106
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40
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15
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ZA-12
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59
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45 - 48
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4 - 7
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95 - 105
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43
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-
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ZA-27
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62
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52 - 55
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2.0 - 3.5
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116 - 122
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47
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21
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Physical Properties
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Alloy
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Density
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Melting
Range
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Specific Heat
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Coefficient of Thermal Expansion
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Thermal Conductivity
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Electrical Conductivity
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Zinc #3
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0.24
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718 - 728
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0.10
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15.2
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65.3
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27
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Zinc #5
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0.24
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717 - 727
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0.10
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15.2
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62.9
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26
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Zinc #7
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0.24
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718 - 728
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0.10
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15.2
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65.3
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27
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ZA-8
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0.227
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707 - 759
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0.104
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12.9
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66.3
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27.7
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ZA-12
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0.218
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710 - 780
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0.107
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13.4
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67.1
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28.3
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ZA-27
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0.181
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708 - 903
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0.125
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14.4
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72.5
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29.7
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