Aluminum Alloys Vs Zinc Alloys
There are two types of common metal alloy material in modern industrial manufacturing, they are aluminum alloys and zinc alloys. Since different metal properties, these material cost and production cost are different. Aluminum alloys raw material cost is higher , and high melting points metal alloy. and low density about 2.7g/m³. However, zinc alloys cost is lower, and belong to low melting metal alloy, and high density about over 5.5g/m³. Through Aluminum Alloys Vs Zinc Alloys, from their metal properties to applications.
Aluminum Alloys Vs Zinc Alloys Pros And Cons
We can learn about pros and cons for aluminum alloys vs zinc alloys from the below information.
Pros And Cons For Aluminum Alloys
| Lightweight
The type metal has far low density about 2.7g/cm³, strong strength and anti-aging property, and withstand high corrosion and worse weather and hash environment. It is ideal for aerospace, automotive and portable device and smart wearable devices.
| Excellent Corrosion Resistance
Naturally forms a protective oxidation layer, which cover the surface of aluminum part and prevent aluminum oxidation. And have an excellent corrosion Resistance.
| High Thermal & Electrical Conductivity
Aluminum naturally has excellent thermal conductivity, many electronic components need aluminum housing and enclosures to transfer overheat into the air quickly and maintain lower temperature. Such as high power LED lighting, electronic product mainboard frame.
| Castability And Ductility
Aluminum alloys blong to metal that easy to process. Whenever casting or extruding, it can be formed into intential geometries. Especially custom aluminum die casting part, when the metal is molten, and have a good fluidity and ductility, and can fill the die fully under high pressure.
| Sustainability And Recyclability
Aluminum is 100% recyclable, like zinc, and as sustainable material, which is applied repeatively with no quality loss. And it is ideal material to eco-friendly. scraps and waste aluminum parts can be remolten and make new cast part again.
| Higher Production Cost Than Zinc Alloys
Aluminum alloy require higher temperature to melt, and longer time for cooling, often generates higher defective rates, result in higher production cost.
| Lower Production Rates
Higher thermal expansion can cause high shrankage and cold shut. What’s more aluminum alloy natural metal property belong to porosity metal,which cause poor part surface during casting process. These factors result in lower production rates.
| Porosity in Castings, facing surface finishing challenges
Hydrogen absorption can cause voids, requiring vacuum casting or degassing. Or another Aluminum Casting Impregnation Reduce Shrink Porosity And Gas Porosity.
Zinc Alloys Pros And Cons
The Advantages of Zinc Die Casting is obvious, Comparison to Other Metal Ones.
| Superior Castability & Fluidity
Zamak alloys have a good fluidity and flow well in mold, filling thin walls(as thin as 0.5mm). So it is epecially suited for precise and small size zinc cast part with tight tolerance dimensions and intricate structure.
| Precise Dimensions And Tight Tolerance Accuracy
Zinc alloys is low melting point metal, has a low shrinkage rate, so it can ensure precise dimensions and tight tolerance accuracy of cast part during die casting process. Especially some small size precise components for communication equipment and 5G IoT Network infrastructure. Like enclosures, housings and connectors.
| High Strength And Stong Wear Risistance
The kind of metal alloy, which has higher tensile strength and strong wear resistance. and endure impact times and high frication applications due to its composition, contain high percentage copper element, and make them more hardness, and endure impacts and wore out.
| Fine As Cast Surface Finish
With high precision steel tooling die, inject high fluidity molten zinc metal, cast zinc die casting part with fine surface. When zinc metal belong to less porosity metal alloy, make the surface of cast part more smoother. allow less post-processes.
| Fast Cast Cycle Production
Lower temps (~385°C/725°F ), allowing quicker die-casting cycles and energy savings. Zinc metal melting and cooling phrases all save more energy and time. Cast cycle is fast, and ensure low cost process and high effective mass production.
| Cost-Effective for Small, Complex Parts
The lower melting decides zinc alloys to cast small sizes casting parts, ensure high quality cast parts at mass production . Because zinc metal has a poor shrinkage and cold shut, ensure cast part tight tolerance dimensional accuracy and perfect complex structural metal parts.
| Brittleness in Certain Alloys
Zamak 7 and ZA-12 are more brittle than aluminum, risking fracture under impact.
Not Ideal for Large Parts: Higher density makes large zinc castings unwieldy and expensive (aluminum or magnesium are better for big components).
| Not Ideal for Large Parts
Higher density makes large zinc castings unwieldy and expensive (aluminum or magnesium are better for big components).
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In summary, there is their own pros and cons between aluminum alloys and zinc alloy. Through the above some striking contrast, let us learn much more about the two types of common metal alloys. zinc alloys are suitable for precision medium and small sized parts, while aluminum alloy are for large sized ones.
Material Types For Aluminum Alloys Vs Zinc Alloys
Take in sight of the below tablet about material types for aluminum alloys vs zinc alloys.
| Aluminum Alloy Types | Zinc Alloy Types |
|---|---|
| 2024: Aluminum (~90%), Copper (Cu): 3.8–4.9%, Magnesium (Mg): 2.1-2.9%, Manganese (Mn): 0.3–0.9%,Iron (Fe): ≤ 0.5%,Silicon (Si): ≤ 0.5%,Zinc (Zn): ≤ 0.25%,Titanium (Ti): ≤ 0.15% | Zamak 2: Zn (~95.5%), Al (3.8–4.2%), Cu (2.7–3.3%), Mg (0.03–0.06%) |
| 7075: Aluminum (~88%), Copper (Cu): 1.2-2.0%, Magnesium (Mg): 0.8-1.2%, Manganese (Mn): ≤ 0.3%,Iron (Fe): ≤ 0.5%,Silicon (Si): ≤ 0.4%,Zinc (Zn): 5.1-6.1%,Chromium (Cr): 0.18–0.28% | Zamak 3: Zn (~95.5%), Al (3.8–4.2%), Cu (<0.1%), Mg (0.02–0.05%) |
| 6061: Aluminum (~97%), Copper (Cu): 0.15-0.4%, Magnesium (Mg): 1.2–1.8%, Iron (Fe): ≤ 0.7%,Silicon (Si): 0.4-0.8%, Zinc (Zn): 0.25%, Chromium (Cr): 0.04-0.35% | Zamak 5: Zn (~95.5%), Al (3.8–4.2%), Cu (0.7–1.1%), Mg (0.03–0.06%) |
| 5052: Aluminum (~96%), Copper (Cu): ≤0.1%, Magnesium (Mg): 2.2-2.8%, Iron (Fe): ≤ 0.45%,Silicon (Si): ≤0.25%, Zinc (Zn): 0.1%, Chromium (Cr): 0.15-0.35% | Zamak 7: Zn (~95.5%), Al (3.8–4.2%), Cu (<0.1%), Mg (0.005–0.02%) |
| 6082: Aluminum (~97%), Copper (Cu): ≤0.1%, Magnesium (Mg): 0.6-1.2%, Iron (Fe): ≤ 0.5%,Silicon (Si): 0.7-1.3%, Zinc (Zn): ≤0.2%, Manganese (Mn): 0.4–1.0% | ZA-8: Zn (~91%), Al (8.2–8.8%), Cu (0.8–1.3%), Mg (0.015–0.03%) |
| 5086: Aluminum (~94%), Copper (Cu): ≤0.1%, Magnesium (Mg): 3.5-4.5%,Chromium (Cr): 0.05–0.25%, Iron (Fe): ≤ 0.5%,Silicon (Si): ≤0.4%, Manganese (Mn): 0.2-0.7% | ZA-12: Zn (~87%), Al (10.5–11.5%), Cu (0.5–1.2%), Mg (0.015–0.03%) |
| 1350: Aluminum (~99.5%), Copper (Cu): ≤0.05%, Iron (Fe): ≤ 0.4%,Silicon (Si): ≤0.1% | ZA-27: Zn (~70%), Al (25–28%), Cu (2.0–2.5%), Mg (0.01–0.02%) |
| 1100: Aluminum (~99%), Copper (Cu): 0.05-0.2%, Iron (Fe): ≤ 0.95%,Silicon (Si): ≤0.95% | ACuZinc (Zn-Al-Cu): Zn (~99.5%), Ti (0.1–0.3%) |
Aluminum Alloys And Zinc Alloys Applications
Aluminum alloys metal properties are different from zinc alloys one completely, this decides they have different applications across many industries. Aluminum die castings belong to light weight products, and used commonly for aerospace, militory, defense and automotive industries, but zinc die castings have supperior finish surfaces, and meet good appearance and intricate shape design, and widely used for automotive, consumer electronics, communucation and appliances industries. Aluminum alloys and zinc alloys, take a look in detal.
Applications Of Aluminum Alloys
Aluminum alloy is very light metal, and castable, and also easy to be machined. So it can be cast into some precision components in aerospace and automotive industries. With Cold chamber die casting approch, die casting manufacturer can choose the right aluminum alloy composition to produce more high precision parts. and use them in many industries.
Aerospace & Aviation
Aircraft structures : fuselage, wings, panels, they are very light, reduce overweight of aircraft or plane.
Spacecraft & Satellites: fuel tanks, structural components are made of aluminum alloys. Either light or high toughness.
Helicopter rotors & engine parts: High hardness, and good resistant to sress.
Common alloys: 2024, 6061, 7075.
Automotive Industry
Engine components: such as pistons, cylinder heads, strong corrosion resistance and high hardness.
Body panels & chassis : weight reduction for fuel efficiency.
Wheels & Suspension Parts: Light weight, and solid and fine integrated structure.
Common alloys: 5052, 6061, 6082.
Marine Applications
Ship hulls & Superstructures: good corrosion-resistant in seawater
Offshore Platforms & Boat Fittings: Easy machined, and remain a high precision dimensions.
Common alloys: 5083, 5086, 6061.
Packaging Industry
Beverage cans (Al 3004 & 5182): high ductility, and easy to form.
Food containers & foil: (Al 8011, 1235). Luxury and storage the food well.
Pharmaceutical packaging: Decoration and promption.
Defense & Military
Armored vehicles & military aircraft: Reduce overweight of equipment, and remain high performance of equipment .
Missile casings & naval ships: light weight, and offer a high speed for very light weight.
Common alloys: 7075, 5083, which are high strength & ballistic resistance.
Zinc Alloys Applications
As one of lower melting points Metal, Zinc alloys can be cast into ideal metal components used largly in many industries, At lower production cost, ensure consistent high quality die casting components with hot chamber die casting process in high efficiency. Of course more complex geometries and integrated structure components for zinc die casting meet the specific requirements of many industries.
Automotive Industry
Transmision And Fuel Line Component: brackets, Fuel filters and gearbox components
Interior and Exterior Components: door handles, Antanna, car label and knob.
Safety Systems: Airbag housings and seatbelt mechanisms due to high strength and impact resistance.
Common Alloys: Zamak 3, Zamak 5, Zamak 7, Zamak 8
Electronics & Electrical Appliances
Connectors & Housings: Used for smartphones, laptops, and power adapters due to its good electricity conductivity and shielding electric magnet signal.
Battery Casings: Strong corrosion resistance and solid.
Common Alloys: Zamak 3, Zamak 5, Zamak 7
Cloth Accessoiries
Zippers & Fasteners: small size and high precision dimensions and a smooth surface finsh.
Hang tags: Easy to cast and fine surfce finish.
Common Alloys: Zamak 3 , Zamak 5
Industrial Applications
Bearings & Bushings: good wear resistance and castable.
Corrosion-Resistant Coatings: Common coating metal, provide a good bond for electrolating process.
Medical & Dental
Dental Amalgams(Zamak 3,Zamak 5 ): as dental filling material.
Surgical Instruments: biocompatibility and sterilization resistance.
We can find that zinc alloys are suitable for high strength-weight ratio cast parts, which requires precision appearance and complex internal structure. While aluminum alloys are best for far lightweight cast parts, which don’t require smooth surface finish but larger ones.
Conclusion
The above has a detail description for aluminum alloys vs zinc alloys from these aspects, which are aluminum alloys vs zinc alloys pros and cons, material types for aluminum alloys vs zinc alloys and zinc alloys applications. As common popular cast metal material, we should select proper material to cast high quality parts and goods to meet various requireements from different industries.
