ZA Alloys Vs Zamak Alloys, Different Applications

ZA(Zinc-Aluminum) Alloys and Zamak alloys blong to two kinds of zinc alloys in one of family of zinc alloys, Depends on their composition, metal properties, These zinc alloys will be used for casting desired zinc die castings to meet the versitile requirement in different industries. Za alloys vs zamak alloys, ZA alloys are higher melting points metal,which contains higher aluminum content. This kind of Zinc alloys are used for components for lightweight, excellent mechanical properities and high strength.

However Zamak alloys are lower melting points zinc alloy, which contains copper content, and harder, which are used for some common consumer electronics, gifts and hardwares. So they also have their different application respectively. Now ZA alloys vs Zamak alloys, ultimate Applications, From the follow key points, look in their difference and benefits in depth.

ZA Alloys Vs Zamak Alloys Material Composition

Different composition content decides different metal properties. Zin-aluminum alloys(called as ZA) contain higher aluminum content, and requires higher temperature to melt the metal, comparison to common zamak alloy, which blong to lower melting points metal. ZA alloys vs Zamak alloys Material Composition as the below.

ZA Alloys Material

Basic of Zn element (~80-90%), other element Al (~8-28%), Cu (~1-3%), Mg (~0.01-0.03%), Higher aluminum content,Hardness: 90-120 BHN, Higher Impact Resistance, Excellent Wear Resistance, Melting Point: 375-485°C. More expensive but offer superior strength. Common ZA alloys include of ZA-8, ZA-12 and ZA-27

• ZA-8: Easiest to cast for small gears, bushings, low-medium load parts
• ZA-12: Automotive components (brackets, pulleys) Industrial machinery parts
• ZA-27: Highest strength, hardest to cast, Bearings, sliding parts (replaces bronze in some cases) Heavy-duty industrial applications.

Zamak Alloys Material

Zn (~95%), Al (~4%), Mg (~0.03-0.06%), Cu (trace), Lower aluminum content, Hardness: 80-100 BHN, Moderate Impact Resistance, Good Wear Resistance, Melting Point: 380-390°C. Lower melting point, energy-efficient, Supperior metal fluidity. More common in thin-walled parts, less poor corrosion resistance, compare to ZA alloys. Cheaper and more widely used in die-casting.

From the above the comparison between both zinc alloys, different zinc alloys can be used in different industrial applications. Depends on the specific demand in various industries, we can select Zamak for high-volume, thin-walled die-cast parts where cost and ease of casting matter, but ZA alloys for stronger, lightweight, wear-resistant components, especially in bearing and structural applications and automotive parts and aerospace components. This is the difference that ZA alloys vs Zamak alloys.

• Zamak 2: Making sporting goods, includes of high-end fishing reels, industrial components, such as tubing fitting, valves and jigs.
• Zamak 3 : Casing for razors, lighters, camera bodies, toy cars (e.g., Hot Wheels), zipper sliders.seat belt components, various knobs and levers, decorative trim for automotive industry,furniture hardware, such as hinks, handles and lock mechanism.
• Zamak 5 : Create heavy-duty lock components, parts in seat mechanisms, Gears, pulleys, bushings, and other light-duty mechanical parts in industrial equipment. Housing for precision measuring instruments.
• Zamak 7 : Suitable for plumbering fitting, automotive exterior decorative components and consumer electrics buttons.

Case Study Of Applications For ZA Alloys Vs Zamak Alloys

The two different types of metal alloys, using hot chamber die casting technology, casting different metal die casting parts, and being applied for different sector in one industry respectively. It reflects the different applications for ZA alloys vs Zamak alloys from the below real case studies.

Automotive Gearbox Housing -ZA Alloys Die Casting

Like these zinc alloy die casting components, belongs to medium size zinc die casting parts. Their attribute focus on the specific features of strong corrosion resistance, high strength, resistant to impact and easy to cast. We firstly plan a zinc die casting component design guide. Our engineering team can design precise steel die with advanced CAD software. Then well-experienced technician follows the design drawing for the die, and fabricate high precision casting die and finish the turnkey project.Strictly comply with international quality management system , the standard IATF 16949, which is the ganratee of high quality automotive components.

Choose The Right ZA alloy

In order to the specific functional requirement, we select ZA-27, which has lightweight,high strength, strong corrosion resistance and easy to cast. Under the lower temperature, the gearbox housing is made out easily. This ZA features as the follow.

High Quality Gearbox Housing Mass Production

Cast Die Design And Fabrication

Firstly, our engineering collaborate with our mold technician fully, design and manufacture high preformance precise tooling steel casting die. and have a trial prototype testing, and remain continuous mold improvement and adjustment until making out satisfied sample. Record the operation parameter and regulate the operation guide.

High Efficiency Mass Productioin

Secondly, Our production supervior arrange mass production, employers fill the selected zinc ingot into the melting pool, and keep the steady temperature molten metal and ready for casting. Technician set up the parameter of die casting machine well, and start mass production in high efficiency. In order to ensure the smooth surface of the gearbox housing, reduce porosity stats, our technician will take some measures to troubleshoot it.

Surfce finishing Options

At last, Triming the flash on the suface of component with cnc machining equipment, and bead shooting the die casting part, and removes the burrs and sharp edges. Sometime they need electroplating on these die casting parts and enhance their apperance and durability, chrome electroplating for corrosion resistance.

Car Key Case Cover-Zamak Alloys Die Casting

A professional automotive manufacturer needed a cost-effective, high-strength, and corrosion-resistant material for producing  car key case covers in high volume. These zinc die casting parts must be high dimensional accuracy, Smooth surface finish (for plating/painting), Good wear resistance and good mechanical properties.

Choose The Right Zamak Alloy

After evaluating options between aluminum and ZA alloys, we chose Zamak 3 (Zn-4Al-0.03Mg) for its excellent castability, strength, and flexiable geometries available. It has these features as the below:

 Die Casting Process

Step 1: Mold Design And Manufacturing

Tool Steel Mold (H13) is selected, our engineers and designers design the precisoin steel casting die with Auto-CAD software. Depends on the principle of hot chamber die casting process, setting cooling channels for rapid solidification. Using EMD machining, process high precision cores and cavities of the casting die, come with appopriate ejection mechanism, finish the mold design and manufacturing.

Step 2: Melting & Casting

Using integrated furnace to melt Zamak 3 ,Melting Temp: ~390°C, maintain the steady temperature zinc molten in melting pool, and preheat the casting die, equal to the temperature of melting zinc alloy. Injecting the molten zinc into the casting die under injection Pressure: ~800-1,200 bar. Then cools the casting die and solidifies the zinc inside the die in a fews seconds. The die is opened, the shaped cast part is ejected out from the die.

Step 3: Post-Processing

Although these zinc alloy die casting parts have a fine surface finish, but the burrs and sharp edges should be trimmed. They accept trimming: Removal of flash via automated trimming. Sometime they need Plating on the surface of them and enhance their apperance and durability, chrome electroplating for corrosion resistance & aesthetics. Conduct Strict Quality Control: X-ray inspection for internal defects.

Conclusion

ZA Alloys vs Zamak Alloys, Mainly Shown in different sector applications in one industry. Because different composition zinc alloy has different metal properties. Zinc-aluminum alloys have a strong strength mechanical properties, and suitable for precision industrial equipment and automotive parts,but Zamak alloys, which has the features of lower melting point and high ductility, are easier to cast, and for electronic consumer goods, hardware, gifts and cloth accessories.